ISO 23551-12

Safety and control devices for gas burners and gas-burning appliances — Particular requirements — Part 12: Multifunctional controls with integral overpressure protection safety function (OPSF) for use with butane gas cartridges used in portable gas appliances

Dispositifs de commande et de sécurité pour brûleurs à gaz et appareils à gaz — Exigences particulières — Partie 12: Équipements multifonctionnels avec fonction de sécurité contre la surpression (OPSF) intégrée pour utilisation avec les cartouches à gaz butane utilisées dans les appareils à gaz portables

General Information

• Status: Not Published
• ICS: 27.060.20 - Gas fuel burners
• Technical Committee: ISO/TC 161 - Controls and protective devices for gas and/or oil
• Drafting Committee: ISO/TC 161/WG 4 - Multifunctional Controls
• Current Stage: 6000 - International Standard under publication
• Completion Date: 15-Jul-2023

Standards Content (Sample)

2022-07-08
2023-05
ISO/DISFDIS 23551-12:20222023(E)
ISO TC 161/WG 4
Secretariat: DIN
Safety and control devices for gas
burners and gas-burning appliances — Particular requirements — Part 12:
Multifunctional controls with integral overpressure protection safety function (OPSF)
for use with butane gas cartridgecartridges used in portable gas appliances

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ISO/DIS FDIS 23551-12:20222023(E)
© ISO 20222023, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
[e-mail]
www.iso.org
ii © ISO 2022 – All rights reserved
ii © ISO 2023 – All rights reserved

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ISO/DIS FDIS 23551-12:20222023(E)
Content
Foreword . vi
Introduction. viii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 2
4 Classification . 4
4.1 Classes of Controls . 4
4.2 Group of Controls . 4
4.3 Types of DC supplied controls . 4
4.4 Classes of control functions . 4
5 Test conditions and tolerances . 4
6 Construction . 4
6.1 General . 4
6.1.1 Controls based on combination of functions . 4
6.1.2 Interaction between Controls . 4
6.2 Construction requirements . 5
6.2.1 Appearance . 5
6.2.2 Holes . 5
6.2.3 Breather holes . 5
6.2.4 Vent limiters . 5
6.2.5 Screwed fastenings . 5
6.2.6 Moving Parts . 5
6.2.7 Sealing caps . 5
6.2.8 Disassembling and assembling for servicing and/or adjustment . 5
6.2.9 Auxiliary channels and orifices . 5
6.2.10 Pre-setting device . 5
6.2.11 Adjustments . 5
6.2.12 Resistance to pressure . 5
6.2.13 Signal tube connections . 6
6.2.14 Operating parts of manual gas valves . 6
6.2.15 Seating force . 6
6.2.16 Tapered plug cavity . 6
6.2.17 Pressure limiting device . 6
6.3 Materials . 6
6.3.1 General material requirements . 6
6.3.2 Housing . 6
6.3.3 Springs providing closing force and sealing force . 7
6.3.4 Resistance to corrosion and surface protection . 7
6.3.5 Impregnation . 7
6.3.6 Seals for glands for moving parts . 7
6.3.7 Jointing . 8
6.3.8 Closure members . 8
6.3.9 Packing . 8
6.3.10 Sealing materials . 8
6.3.11 Grease . 8
© ISO 2022 – All rights reserved iii
© ISO 2023 – All rights reserved iii

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ISO/DIS FDIS 23551-12:20222023(E)
6.4 Connections . 9
6.5 Gas controls employing with electrical components in the gas way . 9
6.6 Component parts . 9
6.7 Appliance connector valves . 9
6.8 Connection to cartridge . 9
6.8.1 Requirement . 9
6.8.2 Test . 9
7 Performance . 9
7.1 General . 9
7.2 Leak tightness . 9
7.2.1 Requirement . 9
7.2.2 Test . 10
7.3 Torsion and bending . 11
7.4 Rated flow rate . 11
7.4.1 General . 11
7.4.2 Requirements . 11
7.5 Durability . 11
7.6 Functional requirements . 11
7.6.1 Operation force of gas valve . 11
7.6.2 Operation of OPSF . 11
7.6.3 Abnormal operation of OPSF . 12
7.6.4 Adjustment pressure of pressure regulator . 12
7.6.5 Interlock (of thermoelectric flame supervision device) . 12
7.6.6 Sealing force (of thermoelectric flame supervision device) . 12
7.6.7 Closing current (of thermoelectric flame supervision device) . 12
7.7 Endurance . 13
7.7.1 Requirement . 13
7.7.2 Test . 13
7.8 Vibration test . 14
7.9 Cold resistance . 14
7.9.1 Requirement . 14
7.9.2 Test . 14
7.10 Heat resistance . 14
7.10.1 Requirement . 14
7.10.2 Test . 14
7.11 Thermal shock resistance . 14
7.11.1 Requirement . 14
7.11.2 Test . 15
7.12 Operation of OPSF after corrosion resistance test . 15
7.12.1 Requirement . 15
7.12.2 Test . 15
8 Electrical equipment . 15
9 Electromagnetic compatibility (EMC) . 15
10 Marking, installation and operating instructions . 15
10.1 Marking . 15
10.2 Installation and operating instructions . 15
10.3 Warning notice . 16
Annex A (informative) Leak-tightness test — Volumetric method . 17
iv © ISO 2022 – All rights reserved
iv © ISO 2023 – All rights reserved

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ISO/DIS FDIS 23551-12:20222023(E)
Annex B (informative) Leak-tightness test — Pressure-loss method . 18
Annex C (normative) Conversion of pressure loss into leakage rate. 19
Annex D (normative) Gas quick connector (GQC). 20
Annex E (normative) Elastomers/requirements resistance to lubricants and gas . 21
Annex F (normative) Specific regional requirements in European countries . 22
Annex G (normative) Specific regional requirements in Canada and USA . 23
Annex H (normative) Specific regional requirements in Japan . 24
© ISO 2022 – All rights reserved v
© ISO 2023 – All rights reserved v

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ISO/DIS FDIS 23551-12:20222023(E)
Contents
Foreword . ix
Introduction. x
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 2
4 Classification . 6
4.1 Classes of controls . 6
4.2 Group of controls . 6
4.3 Types of direct current (DC) supplied controls . 6
4.4 Classes of control functions . 6
5 Test conditions and tolerances . 6
6 Construction . 6
6.1 General . 6
6.1.1 Controls based on combination of functions . 6
6.1.2 Interaction between controls. 7
6.2 Construction requirements . 7
6.2.1 Appearance . 7
6.2.2 Holes . 7
6.2.3 Breather holes . 7
6.2.4 Vent limiters . 7
6.2.5 Screwed fastenings . 7
6.2.6 Moving parts . 7
6.2.7 Sealing caps . 7
6.2.8 Disassembling and assembling for servicing and/or adjustment . 7
6.2.9 Auxiliary channels and orifices . 7
6.2.10 Pre-setting device . 8
6.2.11 Adjustments . 8
6.2.12 Resistance to pressure . 8
6.2.13 Signal tube connections . 8
6.2.14 Operating parts of manual gas valves . 8
6.2.15 Seating force . 8
6.2.16 Tapered plug cavity . 8
6.2.17 Pressure-limiting device . 8
6.3 Materials . 9
6.3.1 General material requirements . 9
6.3.2 Housing . 9
6.3.3 Springs providing closing force and sealing force . 9
6.3.4 Resistance to corrosion and surface protection . 10
6.3.5 Impregnation . 10
6.3.6 Seals for glands for moving parts . 10
6.3.7 Jointing . 10
6.3.8 Closure members . 10
6.3.9 Packing . 10
6.3.10 Sealing materials . 11
6.3.11 Grease . 11
vi © ISO 2022 – All rights reserved
vi © ISO 2023 – All rights reserved

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ISO/DIS FDIS 23551-12:20222023(E)
6.4 Connections . 12
6.5 Gas controls employing with electrical components in the gas way . 12
6.6 Component parts . 12
6.7 Appliance connector valves . 12
6.8 Connection to cartridge . 12
6.8.1 Requirement . 12
6.8.2 Test . 12
7 Performance . 12
7.1 General . 12
7.2 Leak-tightness . 12
7.2.1 General . 12
7.2.2 Requirement . 13
7.2.3 Test . 13
7.3 Torsion and bending . 14
7.4 Rated flow rate . 14
7.4.1 General . 14
7.4.2 Requirements . 14
7.5 Durability . 14
7.6 Functional requirements . 14
7.6.1 General . 14
7.6.2 Operation force of gas valve . 14
7.6.3 Operation of the OPSF . 15
7.6.4 Abnormal operation of the OPSF . 15
7.6.5 Adjustment pressure of pressure regulator . 15
7.6.6 Interlock (of thermoelectric flame supervision device) . 16
7.6.7 Sealing force (of thermoelectric flame supervision device) . 16
7.6.8 Closing current (of thermoelectric flame supervision device) . 16
7.7 Endurance . 16
7.7.1 Requirement . 16
7.7.2 Test .
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 23551-12
ISO/TC 161
Safety and control devices for gas
Secretariat: DIN
burners and gas-burning appliances —
Voting begins on:
2023-05-19 Particular requirements —
Voting terminates on:
Part 12:
2023-07-14
Multifunctional controls with integral
overpressure protection safety
function (OPSF) for use with butane
gas cartridges used in portable gas
appliances
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 23551-12:2023(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 2023

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ISO/FDIS 23551-12:2023(E)
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 23551-12
ISO/TC 161
Safety and control devices for gas
Secretariat: DIN
burners and gas-burning appliances —
Voting begins on:
Particular requirements —
Voting terminates on:
Part 12:
Multifunctional controls with integral
overpressure protection safety
function (OPSF) for use with butane
gas cartridges used in portable gas
appliances
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
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.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
CP 401 • Ch. de Blandonnet 8
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
CH-1214 Vernier, Geneva
DOCUMENTATION.
Phone: [phone]
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: [e-mail]
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 23551-12:2023(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
  © ISO 2023 – All rights reserved
NATIONAL REGULATIONS. © ISO 2023

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ISO/FDIS 23551-12:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification . 3
4.1 Classes of controls . 3
4.2 Group of controls . 4
4.3 Types of direct current (DC) supplied controls . 4
4.4 Classes of control functions . 4
5 Test conditions and tolerances .4
6 Construction . 4
6.1 General . 4
6.1.1 Controls based on combination of functions . 4
6.1.2 Interaction between controls . 4
6.2 Construction requirements. 5
6.2.1 Appearance . 5
6.2.2 Holes . 5
6.2.3 Breather holes . 5
6.2.4 Vent limiters . 5
6.2.5 Screwed fastenings . 5
6.2.6 Moving parts . 5
6.2.7 Sealing caps . 5
6.2.8 Disassembling and assembling for servicing and/or adjustment . 5
6.2.9 Auxiliary channels and orifices . 5
6.2.10 Pre-setting device . 5
6.2.11 Adjustments . . 5
6.2.12 Resistance to pressure . 5
6.2.13 Signal tube connections . 6
6.2.14 Operating parts of manual gas valves . 6
6.2.15 Seating force . 6
6.2.16 Tapered plug cavity . 6
6.2.17 Pressure-limiting device . 6
6.3 Materials . 6
6.3.1 General material requirements . 6
6.3.2 Housing . 6
6.3.3 Springs providing closing force and sealing force . 7
6.3.4 Resistance to corrosion and surface protection . 7
6.3.5 Impregnation . 8
6.3.6 Seals for glands for moving parts. 8
6.3.7 Jointing . 8
6.3.8 Closure members . 8
6.3.9 Packing . 8
6.3.10 Sealing materials . 8
6.3.11 Grease . 9
6.4 Connections . 9
6.5 Gas controls employing with electrical components in the gas way . 9
6.6 Component parts . 9
6.7 Appliance connector valves . 9
6.8 Connection to cartridge . 9
6.8.1 Requirement . 10
6.8.2 Test . . . 10
iii
© ISO 2023 – All rights reserved

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ISO/FDIS 23551-12:2023(E)
7 Performance .10
7.1 General . 10
7.2 Leak-tightness . 10
7.2.1 General . 10
7.2.2 Requirement . 10
7.2.3 Test . . . 11
7.3 Torsion and bending . 11
7.4 Rated flow rate . 11
7.4.1 General . 11
7.4.2 Requirements . 11
7.5 Durability . 12
7.6 Functional requirements . .12
7.6.1 General .12
7.6.2 Operation force of gas valve .12
7.6.3 Operation of the OPSF .12
7.6.4 Abnormal operation of the OPSF . .12
7.6.5 Adjustment pressure of pressure regulator .13
7.6.6 Interlock (of thermoelectric flame supervision device) .13
7.6.7 Sealing force (of thermoelectric flame supervision device) .13
7.6.8 Closing current (of thermoelectric flame supervision device) .13
7.7 Endurance . 13
7.7.1 Requirement .13
7.7.2 Test . . . 14
7.8 Vibration test . 15
7.9 Cold resistance .15
7.9.1 Requirement .15
7.9.2 Test . . . 15
7.10 Heat resistance . 15
7.10.1 Requirement .15
7.10.2 Test . . . 15
7.11 Thermal shock resistance . 15
7.11.1 Requirement .15
7.11.2 Test . . . 15
7.12 Operation of OPSF after corrosion resistance test . 15
7.12.1 Requirement . 16
7.12.2 Test . . . 16
8 Electrical equipment .16
9 Electromagnetic compatibility (EMC) .16
10 Marking, installation and operating instructions .16
10.1 Marking . 16
10.2 Installation and operating instructions . 16
10.3 Warning notice . 16
Annex A (informative) Leak-tightness test — Volumetric method .17
Annex B (informative) Leak-tightness test — Pressure-loss method .18
Annex C (informative) Conversion of pressure loss into leakage rate .19
Annex D (informative) Gas quick connector (GQC) .20
Annex E (informative) Elastomers/requirements resistance to lubricants and gas .21
Annex F (informative) Specific regional requirements in European countries.22
Annex G (informative) Specific regional requirements in Canada and USA .23
Annex H (informative) Specific regional requirements in Japan.24
Annex I (informative) Specific regional requirements in China .26
Bibliography .27
iv
  © ISO 2023 – All rights reserved

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ISO/FDIS 23551-12:2023(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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use
of (a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed
patent rights in respect thereof. As of the date of publication of this document, ISO had not received
notice of (a) patent(s) which may be required to implement this document. However, implementers are
cautioned that this may not represent the latest information, which may be obtained from the patent
database available at www.iso.org/patents. ISO shall not be held responsible for identifying any or all
such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of 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
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 161, Controls and protective devices for
gaseous and liquid fuels.
A list of all parts in the ISO 23551 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.
v
© ISO 2023 – All rights reserved

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ISO/FDIS 23551-12:2023(E)
Introduction
This document is designed to be used in combination with ISO 23550. Together, they establish the full
requirements applicable to the product such as the multifunctional controls mounted on portable gas
appliances (cookers, space heaters, etc.) covered by this document.
Where needed, this document adapts ISO 23550 by stating the corresponding clause number and
adding:
— “with the following modification”;
— “with the following addition”;
— “is replaced by the following”; or
— “is not applicable”.
In order to identify specific requirements that are particular to this document and that are not already
covered by ISO 23550, this document contains certain clauses or subclauses that are additional to the
structure of ISO 23550. These subclauses are indicated by the introductory sentence: “Subclause (or
Annex) specific to this document.”.
To ensure the 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 gas controls and appliances have also been
recognized, some of which are addressed in Annexes F, G and H. This document intends to provide a
basic framework of requirements that recognize these differences.
vi
  © ISO 2023 – All rights reserved

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FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 23551-12:2023(E)
Safety and control devices for gas burners and gas-burning
appliances — Particular requirements —
Part 12:
Multifunctional controls with integral overpressure
protection safety function (OPSF) for use with butane gas
cartridges used in portable gas appliances
1 Scope
This document specifies safety, construction, performance and testing requirements for multifunctional
controls with integral overpressure protection safety function (OPSF) intended for use with portable
gas appliances.
This document is applicable to:
— multifunctional controls which consist of a pressure-limiting device and at least one or more
controls, including but not limited to a manual gas valve, a pressure regulator and a thermoelectric
flame supervision device; and
— multifunctional controls with declared maximum operating pressures in normal use, up to and
including 500 kPa for use with a butane gas cartridge specified by ISO/TS 21985.
This document does not apply to multifunctional controls with OPSF having thread connections for
mounting butane gas cartridges.
This document covers type testing only.
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 301, Zinc alloy ingots intended for castings
ISO 9227:2022, Corrosion tests in artificial atmospheres — Salt spray tests
ISO 23550:2018, Safety and control devices for gas and/or oil burners and appliances — General
requirements
1)
ISO 23551-5:— , Safety and control devices for gas burners and gas-burning appliances — Particular
requirements — Part 5: Manual gas valves
ISO 23551-6:2021, Safety and control devices for gas burners and gas-burning appliances — Particular
requirements — Part 6: Thermoelectric flame supervision controls
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 23550 and the following apply.
1) Under preparation. Stage at the time of publication: ISO/FDIS 23551-5:2023.
1
© ISO 2023 – All rights reserved

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ISO/FDIS 23551-12:2023(E)
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
portable gas appliance
portable appliance using vaporized butane from a replaceable, non-refillable, horizontally-mounted,
butane gas cartridge specified by ISO/TS 21985 as the primary fuel source
3.2
pressure regulator
device that maintains the outlet pressure constant within given limits, independently of the variations
in inlet pressure and/or flow rate
[SOURCE: ISO 23551-2:2018, 3.1.1]
3.3
pressure limiting device
device having overpressure safety function (OPSF) as a function
3.4
overpressure safety function
OPSF
safety function for portable gas appliances which shuts off gas supply to the burner when the supply
pressure from the butane gas cartridge reaches the declared pressure range of the OPSF either by
shutting off the gas passage or by releasing the cartridge
Note 1 to entry: Examples are shown in Figure 1 and Figure 2.
a) Side view b) Top view
Key
1 butane gas cartridge 3 pressure regulator
2 pressure limiting device 4 manual gas valve
a
Gas passage which is shut off by the shut-off valve mounted on the pressure limiting device when the pressure
of the ca
...