Domestic gas cooking appliances -- Safety

This document specifies particular requirements for safety, construction and materials of household gas surface cooking appliances. For general requirements for safety, construction and materials of gas hobs, see ISO/TS 21364-1:2021. This document covers the following: —   surface cooking appliances: —   hobs; —   surface grills; —   griddles; being built-in, part of a cooking appliance or table top; —   hobs accessories. It does not cover surface cooking appliances intended for outdoor use and/or commercial use as well as electrical heated elements as part of the appliance. It also does not cover appliances with automatic burner control systems. NOTE 1   For requirements of electrical safety refer to the IEC 60335 standard series. NOTE 2   Attention is drawn to the fact that —    for appliances intended to be used in vehicles or on board of ships or aircrafts, additional requirements could be necessary; —    in many countries additional requirements are specified by the national health authorities, the national water supply authorities and similar authorities. This document does not cover requirements relating to gas cylinders, their pressure regulators and their connections. This document does not cover requirements for gas installation.

Appareils de cuisson domestiques utilisant les combustibles gazeux -- Sécurité

Le présente document spécifie des exigences particulières relatives à la sécurité, à la construction et aux matériaux des appareils de cuisson domestiques de surface utilisant les combustibles gazeux. Pour les exigences générales de sécurité, de construction et de matériaux des tables de cuisson à gaz, la norme l'ISO/TS 21364-1:2021 s’applique. Le présent document couvre les éléments suivants: —   appareils de cuisson de surface: —   tables de cuisson; —   grils de surface; —   grils par contact; encastrés, faisant partie d’un appareil de cuisson ou à poser sur table; —   accessoires de table de cuisson. Toutefois, il ne couvre pas les appareils de cuisson de surface destinés à une utilisation en extérieur et/ou commerciale, ainsi que les éléments chauffés électriquement faisant partie de l’appareil. Il ne couvre pas non plus les appareils avec systèmes automatiques de commande de brûleur. NOTE 1   Pour les exigences relatives à la sécurité électrique, se référer aux normes IEC. NOTE 2   L'attention est attirée sur le fait que: —    pour les appareils destinés à une utilisation dans des véhicules ou à bord de bateaux ou aéronefs, des exigences supplémentaires peuvent être nécessaires; —    dans de nombreux pays, des exigences supplémentaires sont spécifiées par les autorités sanitaires nationales, les services nationaux de distribution d’eau et les autorités similaires. Le présent document ne couvre pas les exigences relatives aux bouteilles à gaz, à leurs régulateurs de pression ou à leurs raccords. Le présent document ne couvre pas les exigences relatives à l’installation de gaz.

Plinski kuhalni aparati za gospodinjstvo - Varnost - 21. del: Posebne zahteve za plinske kuhalne plošče, plinske žare in plinske žare z rešetko

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Status
Published
Publication Date
20-May-2021
Current Stage
5060 - Close of voting Proof returned by Secretariat
Start Date
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Completion Date
08-Jan-2021

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TECHNICAL ISO/TS
SPECIFICATION 21364-21
First edition
2021-05
Domestic gas cooking appliances —
Safety —
Part 21:
Particular requirements for gas hobs,
gas grills and gas griddles
Appareils de cuisson domestiques utilisant les combustibles gazeux —
Sécurité —
Partie 21: Exigences particulières pour les tables de cuisson à gaz,
grils à gaz et grils par contact à gaz
Reference number
ISO/TS 21364-21:2021(E)
ISO 2021
---------------------- Page: 1 ----------------------
ISO/TS 21364-21:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/TS 21364-21:2021(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................vi

Introduction ..............................................................................................................................................................................................................................vii

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 2

3.1 Definitions relating to components ...................................................................................................................................... 2

4 Components in gas cooking appliances ........................................................................................................................................ 2

4.1 General ........................................................................................................................................................................................................... 2

4.2 Manual gas shut-off valves (Taps) .......................................................................................................................................... 2

4.2.1 Taps for multi-ring burners .................................................................................................................................... 3

4.3 Knobs ............................................................................................................................................................................................................... 3

4.3.1 Design of knobs ................................................................................................................................................................. 3

4.4 Multifunctional controls ................................................................................................................................................................. 3

4.5 Thermoelectric flame supervision controls ................................................................................................................... 3

4.6 Thermostats .............................................................................................................................................................................................. 3

4.7 Pressure regulators ............................................................................................................................................................................. 3

4.8 Automatic shut-off valves .............................................................................................................................................................. 3

4.9 Injectors and adjusters .................................................................................................................................................................... 3

4.10 Ignition systems ..................................................................................................................................................................................... 3

4.11 Thermal cut-outs ................................................................................................................................................................................... 3

4.12 Multi-ring burners ............................................................................................................................................................................... 3

4.13 Overheating safety devices ........................................................................................................................................................... 4

4.13.1 Requirement ........................................................................................................................................................................ 4

4.13.2 Test ............................................................................................................................................................................................... 5

5 General conditions of test ........................................................................................................................................................................... 5

6 Heat input .................................................................................................................................................................................................................... 5

6.1 General ........................................................................................................................................................................................................... 5

6.2 Obtaining the nominal heat input ......... .................................................................................................................................. 5

6.2.1 Test of hob burner .......................................................................................................................................................... 5

6.2.2 Test of multi-ring hob burner ............................................................................................................................... 6

6.2.3 Test of surface grill and griddle without a thermostat ................................................................... 6

6.2.4 Test of surface grill and griddle with a thermostat ............................................................................ 6

6.3 Measurements and calculations ............................................................................................................................................... 6

6.4 Obtaining the reduced heat input ........................................................................................................................................... 6

6.4.1 Requirement ........................................................................................................................................................................ 6

6.4.2 Test ............................................................................................................................................................................................... 6

6.4.3 Test of hob burner, surface grill and griddle burner ......................................................................... 6

6.5 Total heat input ....................................................................................................................................................................................... 7

7 Heating ............................................................................................................................................................................................................................ 7

7.1 General ........................................................................................................................................................................................................... 7

7.2 Operating conditions ......................................................................................................................................................................... 7

7.3 Heating tests.............................................................................................................................................................................................. 7

7.4 Abnormal operation ........................................................................................................................................................................... 7

7.4.1 Hob burner ............................................................................................................................................................................ 7

7.4.2 Gas griddles .......................................................................................................................................................................... 7

8 Combustion ................................................................................................................................................................................................................ 8

8.1 Measurement of all burners simultaneously ................................................................................................................ 8

8.2 Blocked combustion products outlet ................................................................................................................................... 8

8.3 Analysis of the combustion products .................................................................................................................................. 8

8.4 Single burner ............................................................................................................................................................................................ 8

8.4.1 General requirement .................................................................................................................................................... 8

© ISO 2021 – All rights reserved iii
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ISO/TS 21364-21:2021(E)

8.4.2 Hob burner, surface grill burner and griddle burner ....................................................................... 8

8.4.3 Tests of multi-ring burner .................. ...................................................................................................................10

8.4.4 Additional test of Type II and Type V multi-ring burners .........................................................10

8.4.5 Sampling the combustion products ..............................................................................................................10

8.5 Sooting ........................................................................................................................................................................................................13

8.5.1 Requirement .....................................................................................................................................................................13

8.5.2 Test ............................................................................................................................................................................................13

9 Ignition, cross-lighting and flame stability ............................................................................................................................14

9.1 General ........................................................................................................................................................................................................14

9.2 Movement of oven/grill door or cabinet door ..........................................................................................................14

9.3 Hob burner, surface grill burner and griddle burner ..........................................................................................14

9.3.1 General...................................................................................................................................................................................14

9.3.2 Cold conditions ...............................................................................................................................................................14

9.3.3 Hot conditions .................................................................................................................................................................15

9.4 Multi-ring hob burner ....................................................................................................................................................................16

9.4.1 Requirement .....................................................................................................................................................................16

9.4.2 Additional test for Type I multi-ring burners ......................................................................................16

9.4.3 Additional test for Type II and Type V multi-ring burners.......................................................16

9.4.4 Resistance to draught ...............................................................................................................................................16

10 Accumulation of unburnt gas and leak tightness ............................................................................................................17

11 Construction ...........................................................................................................................................................................................................17

11.1 General ........................................................................................................................................................................................................18

11.2 Materials ....................................................................................................................................................................................................18

11.2.1 General...................................................................................................................................................................................18

11.2.2 Burner material test ........................................................................................................................................... ........18

11.2.3 Sealings .................................................................................................................................................................................18

11.2.4 Resistance for non-metallic feet of pan supports .............................................................................18

11.3 Gas inlet connections ......................................................................................................................................................................18

11.4 Conversion to different gases ..................................................................................................................................................18

11.5 Pull forces of knobs for manual gas shut-off valves (taps) ......... ....................................................................18

11.6 Appliances that enable the user to program the start or the end of the cooking cycle .........18

11.7 Compartment for one gas cylinder .....................................................................................................................................18

11.8 Touch controls ......................................................................................................................................................................................18

11.8.1 Requirement .....................................................................................................................................................................19

11.8.2 Test ............................................................................................................................................................................................19

11.9 Resistance to spillage .....................................................................................................................................................................19

11.9.1 Requirement .....................................................................................................................................................................19

11.9.2 Test ............................................................................................................................................................................................19

11.10 Specific hob parts and hob accessories ..........................................................................................................................19

11.10.1 Pan supports .....................................................................................................................................................................19

11.10.2 Removable devices for small pans .................................................................................................................20

11.10.3 Special supports for convex-based pans ..................................................................................................20

11.10.4 Covered burners ............................................................................................................................................................20

11.11 Shut down lids ......................................................................................................................................................................................21

11.11.1 Requirement .....................................................................................................................................................................21

11.11.2 Test ............................................................................................................................................................................................21

11.11.3 Glass shut down lids ..................................................................................................................................................21

11.11.4 Shut-off device ................................................................................................................................................................21

12 Mechanical strength .......................................................................................................................................................................................21

12.1 Parts made of glass and glass-ceramic ............................................................................................................................21

12.1.1 General...................................................................................................................................................................................22

12.1.2 Spring hammer test ....................................................................................................................................................22

12.1.3 Punch test............................................................................................................................................................................22

12.1.4 Thermal stress resistance for glass and glass-ceramic hob surfaces ..............................22

12.2 Pan support .............................................................................................................................................................................................22

12.2.1 Requirement .....................................................................................................................................................................22

iv © ISO 2021 – All rights reserved
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ISO/TS 21364-21:2021(E)

12.2.2 Test ............................................................................................................................................................................................22

12.3 Pan support in contact with the glass or glass ceramic of the hob .........................................................22

13 Electrical safety ...................................................................................................................................................................................................22

14 Marking and instructions .........................................................................................................................................................................22

Annex A (informative) National deviations in various countries ........................................................................................23

© ISO 2021 – All rights reserved v
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ISO/TS 21364-21:2021(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following

URL: www .iso .org/ iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 291, Domestic gas cooking appliances.

A list of all parts in the ISO 21364 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
vi © ISO 2021 – All rights reserved
---------------------- Page: 6 ----------------------
ISO/TS 21364-21:2021(E)
Introduction

This document provides general requirements for safety of domestic gas cooking appliances.

This document can also be applied, so far as is reasonable, to appliances not mentioned in this

specific document and to appliances designed on the basis of new principles, in which case additional

requirements may be necessary.

Where no specific International Standard for an appliance exists, the appliance can be tested according

to this document and further tests which take into account the intended use.

Gas burning appliances using fuel gases need to withstand the type of gas which is specified. Other ISO

technical committees, e.g. ISO/TC 193, Natural gas, deal with the testing and properties of fuel gases.

Note that, due to the differing properties of fuel gas depending on its source/region of origin, certain

differences in regulations exist at present in different regions; some of these differences are presented

in Annex A.
This document covers type testing.
This document series is structured as follows:
ISO 21364 Domestic gas cooking appliances – Safety
— Part 1: General requirements
— Part 21: Particular requirements for hobs, surface grills and griddles
— Part 22: Particular requirements for ovens and compartment grills

This document of ISO 21364 is designed to be used in combination with ISO/TS 21364-1. Together, they

establish the full requirements as they apply to the product covered by this document. Where needed,

this document adapts ISO/TS 21364-1 by stating in the corresponding clause:
— “with the following modification”;
— “with the following addition”;
— “is replaced by the following”;
— “is not applicable”.

In order to identify specific requirements that are particular to this document, that are not already

covered by ISO/TS 21364-1, this document may contain clauses or subclauses that are additional to the

structure of ISO/TS 21364-1.

To ensure global relevance of this document, the differing requirements resulting from practical

experience and installation practices in various regions of the world have been taken into account. The

variations in basic infrastructure associated with appliances have also been recognized, some of which

are addressed in ISO/TS 21364-1:2021, Annex E and ISO/TS 21364-1:2021, Annex A. This document

intends to provide a basic framework of requirements that recognize these differences.

© ISO 2021 – All rights reserved vii
---------------------- Page: 7 ----------------------
TECHNICAL SPECIFICATION ISO/TS 21364-21:2021(E)
Domestic gas cooking appliances — Safety —
Part 21:
Particular requirements for gas hobs, gas grills and gas
griddles
1 Scope

This document specifies particular requirements for safety, construction and materials of household

gas surface cooking appliances. For general requirements for safety, construction and materials of gas

hobs, see ISO/TS 21364-1:2021.
This document covers the following:
— surface cooking appliances:
— hobs;
— surface grills;
— griddles;
being built-in, part of a cooking appliance or table top;
— hobs accessories.

It does not cover surface cooking appliances intended for outdoor use and/or commercial use as well

as electrical heated elements as part of the appliance. It also does not cover appliances with automatic

burner control systems.

NOTE 1 For requirements of electrical safety refer to the IEC 60335 standard series.

NOTE 2 Attention is drawn to the fact that

— for appliances intended to be used in vehicles or on board of ships or aircrafts, additional requirements could

be necessary;

— in many countries additional requirements are specified by the national health authorities, the national

water supply authorities and similar authorities.

This document does not cover requirements relating to gas cylinders, their pressure regulators and

their connections.
This document does not cover requirements for gas installation.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO/TS 21364-1:2021, Domestic gas cooking appliances – Safety- Part 1: General requirements

ISO 23551-8:2016+A1: 2019, Safety and control devices for gas burners and gas-burning appliances —

Particular requirements — Part 8: Multifunctional controls
© ISO 2021 – All rights reserved 1
---------------------- Page: 8 ----------------------
ISO/TS 21364-21:2021(E)

IEC 60730-2-9:2015+A1: 2018, Automatic electrical controls for household and similar use — Part 2-9:

Particular requirements for temperature sensing controls
3 Terms and definitions

For the purposes of this document, the terms and definitions of ISO/TS 21364-1:2021 apply with the

following additions.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electr
...

SPÉCIFICATION ISO/TS
TECHNIQUE 21364-21
Première édition
2021-05
Appareils de cuisson domestiques
utilisant les combustibles gazeux —
Sécurité —
Partie 21:
Exigences particulières pour les tables
de cuisson à gaz, grils à gaz et grils par
contact à gaz
Domestic gas cooking appliances — Safety —
Part 21: Particular requirements for gas hobs, gas grills and gas
griddles
Numéro de référence
ISO/TS 21364-21:2021(F)
ISO 2021
---------------------- Page: 1 ----------------------
ISO/TS 21364-21:2021(F)
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2021

Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette

publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,

y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut

être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.

ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Genève
Tél.: +41 22 749 01 11
E-mail: copyright@iso.org
Web: www.iso.org
Publié en Suisse
ii © ISO 2021 – Tous droits réservés
---------------------- Page: 2 ----------------------
ISO/TS 21364-21:2021(F)
Sommaire Page

Avant-propos ..............................................................................................................................................................................................................................vi

Introduction ..............................................................................................................................................................................................................................vii

1 Domaine d'application ................................................................................................................................................................................... 1

2 Références normatives ................................................................................................................................................................................... 1

3 Termes et définitions ....................................................................................................................................................................................... 2

3.1 Définitions relatives aux composants ................................................................................................................................. 2

4 Composants des appareils de cuisson utilisant les combustibles gazeux ................................................2

4.1 Généralités .................................................................................................................................................................................................. 3

4.2 Robinets manuels de sectionnement de gaz ................................................................................................................. 3

4.2.1 Robinets pour brûleurs multicouronnes .................................................................................................... 3

4.3 Manettes ....................................................................................................................................................................................................... 3

4.3.1 Conception des manettes ......................................................................................................................................... 3

4.4 Équipements multifonctionnels ............................................................................................................................................... 3

4.5 Équipements thermoélectriques de surveillance de flamme ......................................................................... 3

4.6 Thermostats .............................................................................................................................................................................................. 3

4.7 Régulateurs de pression.................................................................................................................................................................. 3

4.8 Robinets automatiques de sectionnement ..................................................................................................................... 3

4.9 Injecteurs et organes de préréglage ..................................................................................................................................... 3

4.10 Systèmes d’allumage .......................................................................................................................................................................... 3

4.11 Dispositifs de coupure thermique .......................................................................................................................................... 4

4.12 Brûleurs multicouronnes ............................................................................................................................................................... 4

4.13 Dispositifs anti-surchauffe ............................................................................................................................................................ 5

4.13.1 Exigence................................................................................................................................................................................... 5

4.13.2 Essai ............................................................................................................................................................................................ 5

5 Conditions générales d'essai .................................................................................................................................................................... 6

6 Débit calorifique ................................................................................................................................................................................................... 6

6.1 Généralités .................................................................................................................................................................................................. 6

6.2 Obtenir le débit calorifique nominal .................................................................................................................................... 6

6.2.1 Mise à l’essai d’un brûleur de table de cuisson ..................................................................................... 6

6.2.2 Mise à l’essai d’un brûleur multicouronnes ............................................................................................. 6

6.2.3 Mise à l’essai d’un gril de surface et d’un gril par contact sans thermostat ................. 6

6.2.4 Mise à l’essai d’un gril de surface et d’un gril par contact avec thermostat ................. 7

6.3 Mesures et calculs ................................................................................................................................................................................ 7

6.4 Obtenir le débit calorifique réduit ......................................................................................................................................... 7

6.4.1 Exigence................................................................................................................................................................................... 7

6.4.2 Essai ............................................................................................................................................................................................ 7

6.4.3 Mise à l’essai d’un brûleur de table de cuisson, d’un gril de surface et d’un

brûleur de gril par contact ...................................................................................................................................... 7

6.5 Débit calorique total ........................................................................................................................................................................... 7

7 Échauffement ........................................................................................................................................................................................................... 7

7.1 Généralités .................................................................................................................................................................................................. 7

7.2 Conditions de fonctionnement .................................................................................................................................................. 7

7.3 Essais d’échauffement ...................................................................................................................................................................... 7

7.4 Fonctionnement anormal .............................................................................................................................................................. 8

7.4.1 Brûleur de table de cuisson .................................................................................................................................... 8

7.4.2 Grils de surface et grils par contact à gaz ................................................................................................... 8

8 Combustion ................................................................................................................................................................................................................ 8

8.1 Mesurage de tous les brûleurs fonctionnant simultanément ......................................................................... 8

8.2 Orifice de sortie des produits de combustion bloqué ........................................................................................... 9

8.3 Analyse des produits de combustion ................................................................................................................................... 9

8.4 Brûleur seul ............................................................................................................................................................................................... 9

© ISO 2021 – Tous droits réservés iii
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ISO/TS 21364-21:2021(F)

8.4.1 Exigences générales ...................................................................................................................................................... 9

8.4.2 Mise à l’essai d’un brûleur de table de cuisson, d’un brûleur de gril de

surface et d’un brûleur de gril par contact ................................................................................................ 9

8.4.3 Mise à l’essai d’un brûleur multicouronnes ..........................................................................................10

8.4.4 Essai supplémentaire des brûleurs multicouronnes de type II et V ................................11

8.4.5 Prélèvement des produits de combustion ..............................................................................................11

8.5 Charbonnement...................................................................................................................................................................................14

8.5.1 Exigence................................................................................................................................................................................14

8.5.2 Essais.......................................................................................................................................................................................14

9 Allumage, interallumage, stabilité des flammes ..............................................................................................................15

9.1 Généralités ...............................................................................................................................................................................................15

9.2 Mouvement de la porte du four/gril ou de la porte du meuble .................................................................15

9.3 Brûleur de table de cuisson, brûleur de gril de surface et brûleur de gril par contact .........15

9.3.1 Généralités .........................................................................................................................................................................15

9.3.2 Essais à froid .....................................................................................................................................................................15

9.3.3 Essais à chaud .................. .................................................... ............................................................................................16

9.4 Brûleur multicouronnes de table de cuisson .............................................................................................................17

9.4.1 Exigence................................................................................................................................................................................17

9.4.2 Essais supplémentaires du type I ...................................................................................................................17

9.4.3 Essais supplémentaires des types II et V .................................................................................................17

9.4.4 Résistance aux courants d'air ............................................................................................................................18

10 Accumulation de gaz non brûlés et étanchéité ..................................................................................................................19

11 Construction ...........................................................................................................................................................................................................19

11.1 Généralités ...............................................................................................................................................................................................19

11.2 Matériaux ..................................................................................................................................................................................................20

11.2.1 Généralités .........................................................................................................................................................................20

11.2.2 Mise à l’essai du matériau des brûleurs ....................................................................................................20

11.2.3 Joints ........................................................................................................................................................................................20

11.2.4 Résistance des pieds non métalliques de la grille-support ......................................................20

11.3 Raccord d'alimentation de gaz ...............................................................................................................................................20

11.4 Adaptation aux différents gaz .................................................................................................................................................20

11.5 Forces de traction des manettes pour les robinets manuels de sectionnement de gaz ........20

11.6 Appareils permettant à l’utilisateur de programmer le démarrage ou la fin du cycle

de cuisson .................................................................................................................................................................................................20

11.7 Logement pour une bouteille de gaz .................................................................................................................................20

11.8 Touches sensitives .............................................................................................................................................................................20

11.8.1 Exigence................................................................................................................................................................................20

11.8.2 Essai .........................................................................................................................................................................................21

11.9 Débordement .........................................................................................................................................................................................21

11.9.1 Exigence................................................................................................................................................................................21

11.9.2 Essais.......................................................................................................................................................................................21

11.10 Pièces spécifiques aux tables de cuisson et accessoires de table de cuisson .................................21

11.10.1 Grilles-support ................................................................................................................................................................21

11.10.2 Supports spéciaux amovibles pour petits récipients ....................................................................22

11.10.3 Supports spéciaux pour récipients à fond convexe .........................................................................22

11.10.4 Brûleurs couverts .........................................................................................................................................................22

11.11 Couvercles-dosserets ......................................................................................................................................................................23

11.11.1 Exigence................................................................................................................................................................................23

11.11.2 Essais.......................................................................................................................................................................................23

11.11.3 Couvercles-dosserets en verre ..........................................................................................................................23

11.11.4 Organe de coupure ......................................................................................................................................................23

12 Résistance mécanique .................................................................................................................................................................................23

12.1 Verre et vitrocéramique ...............................................................................................................................................................24

12.1.1 Généralités .........................................................................................................................................................................24

12.1.2 Essais au marteau à ressort .................................................................................................................................24

12.1.3 Essais au poinçon .........................................................................................................................................................24

iv © ISO 2021 – Tous droits réservés
---------------------- Page: 4 ----------------------
ISO/TS 21364-21:2021(F)
12.1.4 Résistance aux contraintes thermiques pour les surfaces de table de

cuisson en verre et vitrocéramique ..............................................................................................................24

12.2 Grilles-support .....................................................................................................................................................................................24

12.2.1 Exigence................................................................................................................................................................................24

12.2.2 Essai .........................................................................................................................................................................................24

12.3 Grilles support en contact avec les surfaces de table de cuisson en verre ou en

vitrocéramique .....................................................................................................................................................................................24

13 Sécurité électrique ..........................................................................................................................................................................................25

14 Marquage et instructions .........................................................................................................................................................................25

Annexe A (informative) Divergences nationales pour divers pays.....................................................................................26

© ISO 2021 – Tous droits réservés v
---------------------- Page: 5 ----------------------
ISO/TS 21364-21:2021(F)
Avant-propos

L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes

nationaux de normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est

en général confiée aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude

a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,

gouvernementales et non gouvernementales, en liaison avec l'ISO participent également aux travaux.

L'ISO collabore étroitement avec la Commission électrotechnique internationale (IEC) en ce qui

concerne la normalisation électrotechnique.

Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont

décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier de prendre note des différents

critères d'approbation requis pour les différents types de documents ISO. Le présent document a été

rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2 (voir www

.iso .org/ directives).

L'attention est attirée sur le fait que certains des éléments du présent document peuvent faire l'objet de

droits de propriété intellectuelle ou de droits analogues. L'ISO ne saurait être tenue pour responsable

de ne pas avoir identifié de tels droits de propriété et averti de leur existence. Les détails concernant

les références aux droits de propriété intellectuelle ou autres droits analogues identifiés lors de

l'élaboration du document sont indiqués dans l'Introduction et/ou dans la liste des déclarations de

brevets reçues par l'ISO (voir www .iso .org/ brevets).

Les appellations commerciales éventuellement mentionnées dans le présent document sont données

pour information, par souci de commodité, à l'intention des utilisateurs et ne sauraient constituer un

engagement.

Pour une explication de la nature volontaire des normes, la signification des termes et expressions

spécifiques de l'ISO liés à l'évaluation de la conformité, ou pour toute information au sujet de l'adhésion

de l'ISO aux principes de l'Organisation mondiale du commerce (OMC) concernant les obstacles

techniques au commerce (OTC), voir le lien suivant: www .iso .org/ iso/ fr/ avant -propos.

Le présent document a été élaboré par le comité technique ISO/TC 291, Appareils de cuisson domestiques

utilisant les combustibles gazeux.

Une liste de toutes les parties de la série ISO 21364 se trouve sur le site web de l'ISO.

Tout commentaire ou toute question sur ce document doit être adressé à l’organisme national de

normalisation de l’utilisateur. Une liste complète de ces organismes est disponible sur www .iso .org/

members .html.
vi © ISO 2021 – Tous droits réservés
---------------------- Page: 6 ----------------------
ISO/TS 21364-21:2021(F)
Introduction

Le présent document fournit des exigences générales pour la sécurité des appareils de cuisson

domestiques utilisant des combustibles gazeux.

Le présent document peut aussi être appliqué, dans la mesure du raisonnable, à des appareils non

traités par cette norme particulière et à des appareils conçus sur la base de principes nouveaux, auquel

cas des exigences supplémentaires peuvent être nécessaires.

Lorsqu’il n’existe pas de Norme internationale spécifique pour un appareil, celui-ci peut être soumis à

essai conformément à la présente Norme internationale et à des essais complémentaires tenant compte

de l’usage auquel il est destiné.

Les appareils à gaz utilisant des combustibles gazeux doivent supporter le type de gaz spécifié. D’autres

comités techniques de l’ISO, par exemple l’ISO/TC 193, gaz naturel, traitent des essais et des propriétés

des gaz combustibles.

Il convient de noter qu'en raison des changements de propriétés du gaz combustible en fonction de sa

source/région d'origine, il existe actuellement certaines différences entre les réglementations dans

différentes régions; certaines de ces différences sont présentées à l’Annexe A.
Le présent document couvre les essais de type.
La présente série de document est structurée de la manière suivante:

ISO 21364, Appareils de cuisson domestiques utilisant les combustibles gazeux — Sécurité

— Partie 1: Exigences générales;

— Partie 21: Règles particulières pour les tables de cuisson à gaz, grils à gaz et grils par contact à gaz;

— Partie 22: Exigences particulières pour les fours et compartiments de grillage.

Le présent document doit être utilisée conjointement avec l' ISO/TS 21364-1:2021.

Le présent document de l’ISO 21364 est prévu d’être utilisé conjointement avec l’ISO/TS 21364-1:2021.

Ensemble, ils établissent l’ensemble des exigences qui s'applique au produit couvert par ce document.

Le cas échéant, ce document adapte l'ISO/TS 21364-1:2021 en indiquant dans l'article correspondant:

— «avec la modification suivante»;
— «avec l'ajout suivant»;
— «est remplacé par»;
— «n'est pas applicable».

Afin d'identifier les exigences spécifiques qui sont particulières au présent document, qui ne sont

pas déjà couvertes par l'ISO/TS 21364-1:2021, ce document peut contenir des paragraphes ou sous-

paragraphe qui s'ajoutent à la structure de l'ISO/TS 21364-1:2021.

Pour assurer la pertinence globale de ce document, les exigences différentes résultant de l'expérience

pratique et des pratiques d'installation dans diverses régions du monde ont été prises en compte.

Les variations de l'infrastructure de base associées aux appareils ont également été reconnues, dont

certaines sont traitées dans les Annexes E. Le présent document vise à fournir un cadre de base

d'exigences qui reconnaissent ces différences.
© ISO 2021 – Tous droits réservés vii
---------------------- Page: 7 ----------------------
SPÉCIFICATION TECHNIQUE ISO/TS 21364-21:2021(F)
Appareils de cuisson domestiques utilisant les
combustibles gazeux — Sécurité —
Partie 21:
Exigences particulières pour les tables de cuisson à gaz,
grils à gaz et grils par contact à gaz
1 Domaine d'application

Le présente document spécifie des exigences particulières relatives à la sécurité, à la construction

et aux matériaux des appareils de cuisson domestiques de surface utilisant les combustibles gazeux.

Pour les exigences générales de sécurité, de construction et de matériaux des tables de cuisson à gaz, la

norme l'ISO/TS 21364-1:2021 s’applique.
Le présent document couvre les éléments suivants:
— appareils de cuisson de surface:
— tables de cuisson;
— grils de surface;
— grils par contact;
encastrés, faisant partie d’un appareil de cuisson ou à poser sur table;
— accessoires de table de cuisson.

Toutefois, il ne couvre pas les appareils de cuisson de surface destinés à une utilisation en extérieur et/

ou commerciale, ainsi que les éléments chauffés électriquement faisant partie de l’appareil. Il ne couvre

pas non plus les appareils avec systèmes automatiques de commande de brûleur.

NOTE 1 Pour les exigences relatives à la sécurité électrique, se référer aux normes IEC.

NOTE 2 L'attention est attirée sur le fait que:

— pour les appareils destinés à une utilisation dans des véhicules ou à bord de bateaux ou aéronefs, des exigences

supplémentaires peuvent être nécessaires;

— dans de nombreux pays, des exigences supplémentaires sont spécifiées par les autorités sanitaires nationales,

les services nationaux de distribution d’eau et les autorités similaires.

Le présent document ne couvre pas les exigences relatives aux bouteilles à gaz, à leurs régulateurs de

pression ou à leurs raccords.

Le présent document ne couvre pas les exigences relatives à l’installation de gaz.

2 Références normatives

Les documents suivants cités dans le texte constituent, pour tout ou partie de leur contenu, des

exigences du présent d
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 21364-21
ISO/TC 291
Domestic gas cooking appliances —
Secretariat: DIN
Safety —
Voting begins on:
2020-11-13
Part 21:
Voting terminates on:
Particular requirements for gas hobs,
2021-01-08
gas grills and gas griddles
Appareils de cuisson domestiques utilisant les combustibles gazeux —
Sécurité —
Partie 21: Règles particulières pour les tables de cuisson à gaz, grils à
gaz et grils par contact à gaz
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 21364-21:2020(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. ISO 2020
---------------------- Page: 1 ----------------------
ISO/FDIS 21364-21:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/FDIS 21364-21:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................vi

Introduction ..............................................................................................................................................................................................................................vii

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 2

3.1 Definitions relating to components ...................................................................................................................................... 2

4 Components in gas cooking appliances ........................................................................................................................................ 2

4.1 General ........................................................................................................................................................................................................... 2

4.2 Manual gas shut-off valves (Taps) .......................................................................................................................................... 2

4.2.1 Taps for multi-ring burners .................................................................................................................................... 3

4.3 Knobs ............................................................................................................................................................................................................... 3

4.3.1 Design of knobs ................................................................................................................................................................. 3

4.4 Multifunctional controls ................................................................................................................................................................. 3

4.5 Thermoelectric flame supervision controls ................................................................................................................... 3

4.6 Thermostats .............................................................................................................................................................................................. 3

4.7 Pressure regulators ............................................................................................................................................................................. 3

4.8 Automatic shut-off valves .............................................................................................................................................................. 3

4.9 Injectors and adjusters .................................................................................................................................................................... 3

4.10 Ignition systems ..................................................................................................................................................................................... 3

4.11 Thermal cut-outs ................................................................................................................................................................................... 3

4.12 Multi-ring burners ............................................................................................................................................................................... 3

4.13 Overheating safety devices ........................................................................................................................................................... 4

4.13.1 Requirement ........................................................................................................................................................................ 4

4.13.2 Test ............................................................................................................................................................................................... 5

5 General conditions of test ........................................................................................................................................................................... 5

6 Heat input .................................................................................................................................................................................................................... 5

6.1 General ........................................................................................................................................................................................................... 5

6.2 Obtaining the nominal heat input ......... .................................................................................................................................. 5

6.2.1 Test of hob burner .......................................................................................................................................................... 5

6.2.2 Test of multi-ring hob burner ............................................................................................................................... 6

6.2.3 Test of surface grill and griddle without a thermostat ................................................................... 6

6.2.4 Test of surface grill and griddle with a thermostat ............................................................................ 6

6.3 Measurements and calculations ............................................................................................................................................... 6

6.4 Obtaining the reduced heat input ........................................................................................................................................... 6

6.4.1 Requirement ........................................................................................................................................................................ 6

6.4.2 Test ............................................................................................................................................................................................... 6

6.4.3 Test of hob burner, surface grill and griddle burner ......................................................................... 6

6.5 Total heat input ....................................................................................................................................................................................... 7

7 Heating ............................................................................................................................................................................................................................ 7

7.1 General ........................................................................................................................................................................................................... 7

7.2 Operating conditions ......................................................................................................................................................................... 7

7.3 Heating tests.............................................................................................................................................................................................. 7

7.4 Abnormal operation ........................................................................................................................................................................... 7

7.4.1 Hob burner ............................................................................................................................................................................ 7

7.4.2 Gas griddles .......................................................................................................................................................................... 7

8 Combustion ................................................................................................................................................................................................................ 8

8.1 Measurement of all burners simultaneously ................................................................................................................ 8

8.2 Blocked combustion products outlet ................................................................................................................................... 8

8.3 Analysis of the combustion products .................................................................................................................................. 8

8.4 Single burner ............................................................................................................................................................................................ 8

8.4.1 General requirement .................................................................................................................................................... 8

© ISO 2020 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/FDIS 21364-21:2020(E)

8.4.2 Hob burner, surface grill burner and griddle burner ....................................................................... 8

8.4.3 Tests of multi-ring burner .................. ...................................................................................................................10

8.4.4 Additional test of Type II and Type V multi-ring burners .........................................................10

8.4.5 Sampling the combustion products ..............................................................................................................10

8.5 Sooting ........................................................................................................................................................................................................13

8.5.1 Requirement .....................................................................................................................................................................13

8.5.2 Test ............................................................................................................................................................................................13

9 Ignition, cross-lighting and flame stability ............................................................................................................................14

9.1 General ........................................................................................................................................................................................................14

9.2 Movement of oven/grill door or cabinet door ..........................................................................................................14

9.3 Hob burner, surface grill burner and griddle burner ..........................................................................................14

9.3.1 General...................................................................................................................................................................................14

9.3.2 Cold conditions ...............................................................................................................................................................14

9.3.3 Hot conditions .................................................................................................................................................................15

9.4 Multi-ring hob burner ....................................................................................................................................................................16

9.4.1 Requirement .....................................................................................................................................................................16

9.4.2 Additional test for Type I multi-ring burners ......................................................................................16

9.4.3 Additional test for Type II and Type V multi-ring burners.......................................................16

9.4.4 Resistance to draught ...............................................................................................................................................16

10 Accumulation of unburnt gas and leak tightness ............................................................................................................17

11 Construction ...........................................................................................................................................................................................................17

11.1 General ........................................................................................................................................................................................................18

11.2 Materials ....................................................................................................................................................................................................18

11.2.1 General...................................................................................................................................................................................18

11.2.2 Burner material test ........................................................................................................................................... ........18

11.2.3 Sealings .................................................................................................................................................................................18

11.2.4 Resistance for non-metallic feet of pan supports .............................................................................18

11.3 Gas inlet connections ......................................................................................................................................................................18

11.4 Conversion to different gases ..................................................................................................................................................18

11.5 Pull forces of knobs for manual gas shut-off valves (taps) ......... ....................................................................18

11.6 Appliances that enable the user to program the start or the end of the cooking cycle .........18

11.7 Compartment for one gas cylinder .....................................................................................................................................18

11.8 Touch controls ......................................................................................................................................................................................18

11.8.1 Requirement .....................................................................................................................................................................19

11.8.2 Test ............................................................................................................................................................................................19

11.9 Resistance to spillage .....................................................................................................................................................................19

11.9.1 Requirement .....................................................................................................................................................................19

11.9.2 Test ............................................................................................................................................................................................19

11.10 Specific hob parts and hob accessories ..........................................................................................................................19

11.10.1 Pan supports .....................................................................................................................................................................19

11.10.2 Removable devices for small pans .................................................................................................................20

11.10.3 Special supports for convex-based pans ..................................................................................................20

11.10.4 Covered burners ............................................................................................................................................................20

11.11 Shut down lids ......................................................................................................................................................................................21

11.11.1 Requirement .....................................................................................................................................................................21

11.11.2 Test ............................................................................................................................................................................................21

11.11.3 Glass shut down lids ..................................................................................................................................................21

11.11.4 Shut-off device ................................................................................................................................................................21

12 Mechanical strength .......................................................................................................................................................................................21

12.1 Parts made of glass and glass-ceramic ............................................................................................................................21

12.1.1 General...................................................................................................................................................................................22

12.1.2 Spring hammer test ....................................................................................................................................................22

12.1.3 Punch test............................................................................................................................................................................22

12.1.4 Thermal stress resistance for glass and glass-ceramic hob surfaces ..............................22

12.2 Pan support .............................................................................................................................................................................................22

12.2.1 Requirement .....................................................................................................................................................................22

iv © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/FDIS 21364-21:2020(E)

12.2.2 Test ............................................................................................................................................................................................22

12.3 Pan support in contact with the glass or glass ceramic of the hob .........................................................22

13 Electrical safety ...................................................................................................................................................................................................22

14 Marking and instructions .........................................................................................................................................................................23

Annex A (informative) National deviations in various countries ........................................................................................24

© ISO 2020 – All rights reserved v
---------------------- Page: 5 ----------------------
ISO/FDIS 21364-21:2020(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following

URL: www .iso .org/ iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 291, Domestic gas cooking appliances.

A list of all parts in the ISO 21364 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
vi © ISO 2020 – All rights reserved
---------------------- Page: 6 ----------------------
ISO/FDIS 21364-21:2020(E)
Introduction

This document provides general requirements for safety of domestic gas cooking appliances.

This document can also be applied, so far as is reasonable, to appliances not mentioned in this

specific document and to appliances designed on the basis of new principles, in which case additional

requirements may be necessary.

Where no specific International Standard for an appliance exists, the appliance can be tested according

to this document and further tests which take into account the intended use.

Gas burning appliances using fuel gases need to withstand the type of gas which is specified. Other ISO

technical committees, e.g. ISO/TC 193, Natural gas, deal with the testing and properties of fuel gases.

Note that, due to the differing properties of fuel gas depending on its source/region of origin, certain

differences in regulations exist at present in different regions; some of these differences are presented

in Annex E.
This document covers type testing.
This document series is structured as follows:
ISO 21364 Domestic gas cooking appliances – Safety
— Part 1: General requirements
— Part 21: Particular requirements for hobs, surface grills and griddles
— Part 22: Particular requirements for ovens and compartment grills
1).

This document of ISO 21364 is designed to be used in combination with ISO 21364-1 Together, they

establish the full requirements as they apply to the product covered by this document. Where needed,

this document adapts ISO 21364-1 by stating in the corresponding clause:
— “with the following modification”;
— “with the following addition”;
— “is replaced by the following”;
— “is not applicable”.

In order to identify specific requirements that are particular to this document, that are not already

covered by ISO 21364-1, this document may contain clauses or subclauses that are additional to the

structure of ISO 21364-1.

To ensure global relevance of this document, the differing requirements resulting from practical

experience and installation practices in various regions of the world have been taken into account. The

variations in basic infrastructure associated with appliances have also been recognized, some of which

are addressed in Annexes E. This document intends to provide a basic framework of requirements that

recognize these differences.
1) Under preparation. Stage at the time of publication: ISO/FDIS 21364-1.
© ISO 2020 – All rights reserved vii
---------------------- Page: 7 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 21364-21:2020(E)
Domestic gas cooking appliances — Safety —
Part 21:
Particular requirements for gas hobs, gas grills and gas
griddles
1 Scope

This document specifies particular requirements for safety, construction and materials of household

gas surface cooking appliances. For general requirements for safety, construction and materials of gas

hobs, see ISO/FDIS 21364-1:—.
This document covers the following:
— surface cooking appliances:
— hobs;
— surface grills;
— griddles;
being built-in, part of a cooking appliance or table top;
— hobs accessories.

It does not cover surface cooking appliances intended for outdoor use and/or commercial use as well

as electrical heated elements as part of the appliance. It also does not cover appliances with automatic

burner control systems.

NOTE 1 For requirements of electrical safety refer to the IEC 60335 standard series.

NOTE 2 Attention is drawn to the fact that

— for appliances intended to be used in vehicles or on board of ships or aircrafts, additional requirements could

be necessary;

— in many countries additional requirements are specified by the national health authorities, the national

water supply authorities and similar authorities.

This document does not cover requirements relating to gas cylinders, their pressure regulators and

their connections.
This document does not cover requirements for gas installation.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO/FDIS 21364-1:—, Domestic gas cooking appliances – Safety- Part 1: General requirements

I S O 23551- 8:2016 +A 1: 2019, Safety and control devices for gas burners and gas-burning appliances —

Particular requirements — Part 8: Multifunctional controls
© ISO 2020 – All rights reserved 1
---------
...

SLOVENSKI STANDARD
oSIST ISO/DIS 21364-21:2020
01-marec-2020
Plinski kuhalni aparati za gospodinjstvo - Varnost - 21. del: Posebne zahteve za
plinske kuhalne plošče, plinske žare in plinske žare z rešetko

Domestic gas cooking appliances - Safety - Part 21: Particular requirements for gas

hobs, gas grills and gas griddles
Titre manque - Partie 21: Titre manque
Ta slovenski standard je istoveten z: ISO/DIS 21364-21:2020
ICS:
97.040.20 Štedilniki, delovni pulti, Cooking ranges, working
pečice in podobni aparati tables, ovens and similar
appliances
oSIST ISO/DIS 21364-21:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST ISO/DIS 21364-21:2020
---------------------- Page: 2 ----------------------
oSIST ISO/DIS 21364-21:2020
DRAFT INTERNATIONAL STANDARD
ISO/DIS 21364-21
ISO/TC 291 Secretariat: DIN
Voting begins on: Voting terminates on:
2020-01-30 2020-04-23
Domestic gas cooking appliances — Safety —
Part 21:
Particular requirements for gas hobs, gas grills and gas
griddles
ICS: 97.040.20
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
This document is circulated as received from the committee secretariat.
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 21364-21:2020(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. ISO 2020
---------------------- Page: 3 ----------------------
oSIST ISO/DIS 21364-21:2020
ISO/DIS 21364-21:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST ISO/DIS 21364-21:2020
ISO/DIS 21364-21:2020(E)
Contents Page

Foreword ..........................................................................................................................................................................................................................................v

Introduction ................................................................................................................................................................................................................................vi

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 2

4 Components in gas cooking appliances ........................................................................................................................................ 2

4.2 Manual gas shut-off valves (Taps) .......................................................................................................................................... 2

4.2.101 Taps for multi-ring burners .................................................................................................................................... 2

4.3 Knobs ............................................................................................................................................................................................................... 3

4.3.1 Design of knobs ................................................................................................................................................................. 3

4.101 Multi-ring burners ............................................................................................................................................................................... 3

4.102 Overheating safety devices ........................................................................................................................................................... 4

4.102.1 Requirement ........................................................................................................................................................................ 4

4.102.2 Test ............................................................................................................................................................................................... 4

5 General conditions of test ........................................................................................................................................................................... 5

6 Heat input .................................................................................................................................................................................................................... 5

6.2 Obtaining the nominal heat input ......... .................................................................................................................................. 5

6.2.101 Test of hob burner .......................................................................................................................................................... 5

6.2.102 Test of multi-ring hob burner ............................................................................................................................... 5

6.2.103 Test of surface grill and griddle without a thermostat ................................................................... 5

6.2.104 Test of surface grill and griddle with a thermostat ............................................................................ 5

6.4 Obtaining the reduced heat input ........................................................................................................................................... 6

6.4.101 Test of hob burner, surface grill and griddle burner ......................................................................... 6

7 Heating ............................................................................................................................................................................................................................ 6

7.4 Abnormal operation ........................................................................................................................................................................... 6

7.4.101 Hob burner ............................................................................................................................................................................ 6

7.4.102 Gas surface grills and griddles ............................................................................................................................. 6

8 Combustion ................................................................................................................................................................................................................ 7

8.101 Single burner ............................................................................................................................................................................................ 7

8.101.1 General requirement .................................................................................................................................................... 7

8.101.2 Tests of hob burner, surface grill burner and griddle burner ................................................... 7

8.101.3 Tests of multi-ring burner .................. ...................................................................................................................... 8

8.101.4 Additional test of Type II and Type V multi-ring burners ............................................................ 9

8.101.5 Sampling the combustion products ................................................................................................................. 9

8.102 Sooting ........................................................................................................................................................................................................12

8.102.1 Requirement .....................................................................................................................................................................12

8.102.2 Test ............................................................................................................................................................................................12

9 Ignition, cross-lighting and flame stability ............................................................................................................................13

9.101 Hob burner, surface grill burner and griddle burner ..........................................................................................13

9.101.1 General...................................................................................................................................................................................13

9.101.2 Cold conditions ...............................................................................................................................................................13

9.101.3 Hot conditions .................................................................................................................................................................14

9.102 Multi-ring hob burner ....................................................................................................................................................................14

9.102.1 Requirement .....................................................................................................................................................................14

9.102.2 Additional test Type I ........................................................................................................................................... .....15

9.102.3 Additional test Type II and Type V ................................................................................................................15

9.102.4 Resistance to draught ...............................................................................................................................................15

10 Accumulation of unburnt gas and leak tightness ............................................................................................................16

11 Construction ...........................................................................................................................................................................................................16

11.2 Materials ....................................................................................................................................................................................................16

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11.2.101 ........................................................................................................................................................

Resistance for non-metallic feet of pan supports .............................................................................17

11.101 Spillage ........................................................................................................................................................................................................17

11.101.1 ........................................................................................................................................................

Requirement .....................................................................................................................................................................17

11.101.2 ........................................................................................................................................................

Test ............................................................................................................................................................................................17

11.102 Specific hob parts and hob accessories ..........................................................................................................................17

11.102.1 ........................................................................................................................................................

Pan supports .....................................................................................................................................................................17

11.102.2 ........................................................................................................................................................

Removable devices for small pans .................................................................................................................17

11.102.3 ........................................................................................................................................................

Special supports for convex-based pans ..................................................................................................18

11.102.4 ........................................................................................................................................................

Covered burners ............................................................................................................................................................18

11.103 Shut down lids ......................................................................................................................................................................................18

11.103.1 ........................................................................................................................................................

Requirement .....................................................................................................................................................................18

11.103.2 ........................................................................................................................................................

Test ............................................................................................................................................................................................18

11.103.3 ........................................................................................................................................................

Glass shut down lids ..................................................................................................................................................18

11.103.4 ........................................................................................................................................................

Shut-off device ................................................................................................................................................................19

12 Mechanical strength .......................................................................................................................................................................................19

12.1 Glass and glass ceramic ................................................................................................................................................................19

12.1.101 ........................................................................................................................................................

Thermal stress resistance for hob glass and glass-ceramic surfaces ..............................20

12.101 Pan support .............................................................................................................................................................................................20

12.101.1 ........................................................................................................................................................

Requirement .....................................................................................................................................................................20

12.101.2 ........................................................................................................................................................

Test ............................................................................................................................................................................................20

13 Electrical safety ...................................................................................................................................................................................................20

13.3 Touch controls ......................................................................................................................................................................................20

13.3.101 ........................................................................................................................................................

Requirement .....................................................................................................................................................................20

13.3.102 ........................................................................................................................................................

Test ............................................................................................................................................................................................20

14 Marking and instructions .........................................................................................................................................................................21

Annexes Annexes .................................................................................................................................................................................................................22

Annex E (informative) National deviations in various countries .........................................................................................23

Bibliography .............................................................................................................................................................................................................................25

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Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following

URL: www .iso .org/ iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 291, Domestic gas cooking appliances.

A list of all parts in the ISO 21364 series can be found on the ISO website.
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Introduction

This International Standard provides general requirements for safety of domestic gas cooking

appliances.

This International Standard can also be applied, so far as is reasonable, to appliances not mentioned in

this specific standard and to appliances designed on the basis of new principles, in which case additional

requirements may be necessary.

Where no specific International Standard for an appliance exists, the appliance can be tested according

to this International Standard and further tests which take into account the intended use.

Gas burning appliances using fuel gases need to withstand the type of gas which is specified. Other ISO

technical committees, e.g. ISO/TC 193, Natural gas, deal with the testing and properties of fuel gases.

Note that, due to the differing properties of fuel gas depending on its source/region of origin, certain

differences in regulations exist at present in different regions; some of these differences are presented

in Annex E.
This International Standard covers type testing.
This International Standard series is structured as follows:
ISO 21364 Domestic gas cooking appliances – Safety
— Part 1: General requirements
— Part 21: Particular requirements for gas hobs, gas grills and gas griddles
— Part 22: Particular requirements for ovens and compartment grills
This Part 21 is to be used in conjunction with ISO/DIS 21364-1:2019.

This Part 21 supplements or modifies the corresponding clauses in ISO/DIS 21364-1:2019, so as to

convert that publication into the ISO standard: Specific requirements for gas hobs, gas grills and gas

griddles.

When a particular subclause of ISO/DIS 21364-1:2019 is not mentioned in this Part 2, that subclause

applies as far as is reasonable. When this standard states “Addition”, “Modification” or “Replacement”,

the relevant text in ISO/DIS 21364-1:2019 is to be adapted accordingly.
NOTE 1 The following numbering system is used:

— subclauses, tables and figures that are numbered starting from 101 are additional to those in

ISO/DIS 21364-1:2019;

— unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including

those in a replaced clause or subclause;
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DRAFT INTERNATIONAL STANDARD ISO/DIS 21364-21:2020(E)
Domestic gas cooking appliances — Safety —
Part 21:
Particular requirements for gas hobs, gas grills and gas
griddles
1 Scope

This Part of ISO 21364 specifies particular requirements for safety, construction and materials of

household gas surface cooking appliances. For general requirements for safety, construction and

materials of gas hobs the Standard ISO/DIS 21364-1:2019 applies.
This Part covers the following:
— surface cooking appliances:
— hobs;
— surface grills;
— griddles;
being built-in, part of a cooking appliance or table top;
— hobs accessories.

It does not cover surface cooking appliances intended for outdoor use and/or commercial use as well

as electrical heated elements as part of the appliance. It does also not cover appliances with automatic

burner control systems.
NOTE 1 For requirements of electrical safety refer to the IEC standards.
NOTE 2 Attention is drawn to the fact that

— for appliances intended to be used in vehicles or on board ships or aircraft, additional requirements may be

necessary;

— in many countries additional requirements are specified by the national health authorities, the national

water supply authorities and similar authorities
This International Standard does not cover requirements for gas installation.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 21364-1:20xx, Domestic gas cooking appliances – Safety- Part 1: General requirements

ISO 23551-8:2019, Safety and control devices for gas burners and gas-burning appliances — Particular

requirements — Part 8: Multifunctional controls

IEC 60730-2-9:2018, Automatic electrical controls for household and similar use — Part 2-9: Particular

requirements for temperature sensing controls
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3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO/DIS 21364-1:2019 apply with

the following additions.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at https:// www .iso .org/ obp
3.3 Definitions relating to components
3.3.101
Hob guard

device that reduces physical access to the cooking surface to avoid hazardous situations

3.3.102
open burner
hob burner with the flame in direct contact with the pan
3.3.103
multi-ring burners
hob burner assembly having two or more rings of burner ports

Note 1 to entry: The term ring includes any distribution of burner ports around the central axis of the burner.

Note 2 to entry: A detailed description of the different types of burners and their operating modes is given in

Table 101.
3.3.104
multi-ring burner with sectional control

multi-ring burner that is so designed that one or more of its rings of burner ports can be utilised

independently
3.3.105
multi-ring burner with simple control

multi-ring burner that is so designed that its rings of burner ports cannot be utilised independently

3.3.106
overheating safety device

temperature sensing device which is intended to keep temperature below one particular value during

abnormal operating conditions of the appliance and which has no provision for setting by the end user

[SOURCE: ISO 23551-8:2019, Annex BB]

Note 1 to entry: Note to entry: These devices usually use a thermistor or a bimetal sensing part (element).

4 Components in gas cooking appliances
This clause of ISO/DIS 21364-1:2019 applies with the following additions.
4.2 Manual gas shut-off valves (Taps)
This clause of ISO/DIS 21364-1:2019 applies with the following additions.
4.2.101 Taps for multi-ring burners

The “off” position of a single sectional control with two closing directions for multi-ring hob burners

shall be designed to make it impossible for the tap knob to be inadvertently moved from one adjustment

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range to another. However, if each ring of such multi-sectional hob burner is supervised by a flame

supervision device, the single sectional control shall stop in its “off” position.

4.3 Knobs
This clause of ISO/DIS 21364-1:2019 applies with the following additions.
4.3.1 Design of knobs
This clause of ISO/DIS 21364-1:2019 applies with the following additions.
4.3.1.101 Multi-ring burner knobs

If the control knob operates by turning, the closing direction shall only be clockwise. This does not

apply to multi-ring hob burners with a single sectional control and two closing directions.

4.101 Multi-ring burners
Table 101 shows examples of mul
...

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