Explosive atmospheres - Part 37: Non-electrical equipment for explosive atmospheres - Non-electrical type of protection constructional safety ''c'', control of ignition sources ''b'', liquid immersion ''k'' (ISO 80079-37:2016)

ISO 80079-37:2016 specifies the requirements for the design and construction of non-electrical equipment, intended for use in explosive atmospheres, protected by the types of protection        
constructional safety "c", control of ignition source "b" and liquid immersion "k". This part of ISO/IEC 80079 supplements and modifies the requirements in ISO 80079-36. Where a requirement of this standard conflicts with the requirement of ISO 80079-36 the requirement of this standard takes precedence. Types of protection "c", "k" and "b" are not applicable for Group I, EPL Ma without    
additional protective precautions. The types of ignition protection described in the standard can be used either on their own or in combination with each other to meet the requirements for equipment of Group I, Group II, and Group III depending on the ignition hazard assessment in ISO 80079-36.                                        
Keywords: constructional safety "c", control of ignition source "b" and liquid immersion "k"

Explosionsfähige Atmosphären - Teil 37: Nicht-elektrische Geräte für den Einsatz in explosionsfähigen Atmosphären - Schutz durch konstruktive Sicherheit 'c', Zündquellenüberwachung 'b', Flüssigkeitskapselung 'k' (ISO 80079-37:2016)

Diese Internationale Norm legt die Anforderungen an die Konstruktion und den Bau von nichtelektrischen Geräten fest, die für den Einsatz in explosionsfähigen Atmosphären vorgesehen sind und durch die Zündschutzarten konstruktive Sicherheit "ch", Zündquellenüberwachung "bh" und Flüssigkeitskapselung "kh" geschützt sind.
Die Norm ergänzt und modifiziert die Anforderungen in ISO 80079-36. Wenn eine Anforderung dieser Norm im Widerspruch zu der Anforderung von ISO 80079-36 steht, hat die Anforderung der vorliegenden Norm Vorrang.
Die Schutzarten "ch", "kh" und "bh" sind ohne zusätzliche Schutzmaßnahmen für Gruppe I, EPL Ma, nicht anwendbar.
Die in der Norm beschriebenen Zündschutzarten können entweder für sich allein oder in Kombination miteinander angewendet werden, um die Anforderungen an Geräte der Gruppe I, Gruppe II und Gruppe III in Abhängigkeit von der Zündgefahrenbewertung in ISO 80079-36 zu erfüllen.

Atmosphères explosives - Partie 37: Appareils non électriques destinés à être utilisés en atmosphères explosives - Mode de protection non électrique par sécurité de construction "c", par contrôle de la source d'inflammation "b", par immersion dans un liquide "k" (ISO 80079-37:2016)

L'ISO 80079-37:2016 spécifie les exigences relatives à la conception et à la construction d'un appareil non électrique, destiné à être utilisé dans les atmosphères explosives et protégés par les modes de protection par sécurité de construction "c", par contrôle de la source d'inflammation "b", par immersion dans un liquide "k". La présente partie de l'ISO/IEC 80079 complète et modifie les exigences de l'ISO 80079-36. Lorsqu'une exigence de cette norme s'oppose à une exigence de l'IEC 80079-36, l'exigence de cette norme prime. Les types de protections "c", "k" et "b" ne s'appliquent pas pour le Groupe I, EPL Ma sans l'ajout d'autres précautions de protection. Les modes de protection contre l'inflammation décrits dans la norme peuvent être utilisés indépendamment ou en combinaison les uns avec les autres pour satisfaire aux exigences relatives aux appareils du Groupe I, du Groupe II et du Groupe III, en fonction de l'évaluation du danger d'inflammation dans l'ISO 80079-36.                      
Mots clés: sécurité de construction "c", par contrôle de la source d'inflammation "b", par immersion dans un liquide "k"

Eksplozivne atmosfere - 37. del: Neelektrična oprema za uporabo v potencialno eksplozivnih atmosferah - Neelektrična vrsta zaščite s konstrukcijsko varnostjo "c", kontrolo virov vžiga "b", s potopitvijo v tekočino "k" (ISO 80079-37:2016)

Ta mednarodni standard določa zahteve za načrtovanje in konstrukcijo neelektrične opreme, ki je namenjena za uporabo v eksplozivnih atmosferah in je zaščitena z vrstami zaščite s konstrukcijsko varnostjo, kontrolo virov vžiga in potopitvijo v tekočino.
Ta standard dopolnjuje zahteve iz standarda IEC 80079-36, katerega vsebina se prav tako v celoti uporablja za opremo, izdelano v skladu s tem standardom.

General Information

Status
Published
Publication Date
05-Apr-2016
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
10-Mar-2014

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SLOVENSKI STANDARD
SIST EN ISO 80079-37:2016
01-julij-2016
1DGRPHãþD
SIST EN 13463-5:2011
SIST EN 13463-6:2005
SIST EN 13463-8:2003
(NVSOR]LYQHDWPRVIHUHGHO1HHOHNWULþQDRSUHPD]DXSRUDERYSRWHQFLDOQR
HNVSOR]LYQLKDWPRVIHUDK1HHOHNWULþQDYUVWD]DãþLWHVNRQVWUXNFLMVNRYDUQRVWMR
FNRQWURORYLURYYåLJDEVSRWRSLWYLMRYWHNRþLQRN ,62
Explosive atmospheres - Part 37: Non-electrical equipment for use in explosive

atmospheres - Non-electrical type of protection constructional safety 'c', control of ignition

sources 'b', liquid immersion 'k' (ISO 80079-37:2016)
Explosionsfähige Atmosphären - Nicht-elektrische Geräte für den Einsatz in

explosionsfähigen Atmosphären - Teil 37: Sicherheit 'c', Zündquellenüberwachung 'b',

Flüssigkeitskapselung 'k' (ISO 80079-37:2016)
Atmosphères explosives - Partie 37: Matériels non électriques pour atmosphères

explosives - Mode de protection non électrique par sécurité de construction "ch", par

contrôle de source d'inflammation "bh", par immersion dans un liquide "kh" (ISO/DIS

80079-37:2016)
Ta slovenski standard je istoveten z: EN ISO 80079-37:2016
ICS:
13.230 Varstvo pred eksplozijo Explosion protection
29.260.20 (OHNWULþQLDSDUDWL]D Electrical apparatus for
HNVSOR]LYQDR]UDþMD explosive atmospheres
SIST EN ISO 80079-37:2016 en,fr,de

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

---------------------- Page: 1 ----------------------
SIST EN ISO 80079-37:2016
---------------------- Page: 2 ----------------------
SIST EN ISO 80079-37:2016
EN ISO 80079-37
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2016
EUROPÄISCHE NORM
ICS 29.260.20 Supersedes EN 13463-5:2011, EN 13463-6:2005, EN
13463-8:2003
English Version
Explosive atmospheres - Part 37: Non-electrical equipment
for explosive atmospheres - Non-electrical type of
protection constructional safety ''c'', control of ignition
sources ''b'', liquid immersion ''k'' (ISO 80079-37:2016)

Atmosphères explosives - Partie 37: Appareils non Explosionsgefährdete Bereiche - Teil 37: Nicht-

électriques destinés à être utilisés en atmosphères elektrische Geräte für den Einsatz in

explosives - Mode de protection non électrique par explosionsgefährdeten Bereichen - Schutz durch

sécurité de construction "c", par contrôle de la source konstruktive Sicherheit 'c', Zündquellenüberwachung

d'inflammation "b", par immersion dans un liquide "k" 'b', Flüssigkeitskapselung 'k' (ISO 80079-37:2016)

(ISO 80079-37:2016)
This European Standard was approved by CEN on 8 February 2016.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 80079-37:2016 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 80079-37:2016
EN ISO 80079-37:2016 (E)
Contents Page

European Foreword ...................................................................................................................................................... 3

Annex ZA (informative) Relationship between this European Standard and the Essential

Requirements of EU Directive 2014/34/EU ......................................................................................... 4

Annex ZB (informative) Significant changes between this European Standard and

EN 13463-5:2011, EN 13463-6:2005 and EN 13463-8:2003 ........................................................... 6

---------------------- Page: 4 ----------------------
SIST EN ISO 80079-37:2016
EN ISO 80079-37:2016 (E)
European Foreword

This document (EN ISO 80079-37:2016) has been prepared by Technical Committee ISO/TMBG

"Technical Management Board - groups" in collaboration with Technical Committee CEN/TC 305

“Potentially explosive atmospheres - Explosion prevention and protection” the secretariat of which is

held by DIN.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by October 2016, and conflicting national standards shall

be withdrawn at the latest by October 2016.

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

patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent

rights.

The significant changes with respect to EN 13463-5:2011, EN 13463-6:2005 and EN 13463-8:2003 are

included in Annex ZB “Significant changes between this European Standard and EN 13463-5:2011,

EN 13463-6:2005 and EN 13463-8:2003".
This document supersedes EN 13463-5:2011, EN 13463-6:2005, EN 13463-8:2003.

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association, and supports essential requirements of 2014/34/EU.

For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this

document.

Extensions to the marking scheme described in the Directive are found in the ATEX Guidelines

published by the European Commission. These are particularly useful for equipment that conforms to

more than one category.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,

France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,

Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
Endorsement notice

The text of ISO 80079-37:2016 has been approved by CEN as EN ISO 80079-37:2016 without any

modification.
---------------------- Page: 5 ----------------------
SIST EN ISO 80079-37:2016
EN ISO 80079-37:2016 (E)
Annex ZA
(informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 2014/34/EU

This European Standard has been prepared under a mandate given to CEN by the European

Commission and the European Free Trade Association to provide a means of conforming to Essential

Requirements of the New Approach Directive 2014/34/EU.

Once this standard is cited in the Official Journal of the European Union under that Directive and has

been implemented as a national standard in at least one Member State, compliance with the clauses of

this standard given in Table ZA.1 confers, within the limits of the scope of this standard, a presumption

of conformity with the corresponding Essential Requirements of that Directive and associated EFTA

regulations.
Table ZA.1 — Correspondence between this European Standard and Directive 94/9/EC
Clause(s)/sub- Essential Requirements Qualifying remarks/Notes
clause(s) of this EN (ERs) of 2014/34 EU
4 1.1.1
1.1.3
5.1 1.3.4 See also 80079-36
1.4.1 Clause has some limited relevance to ESR
1.2.4
5.2 1.1.1
5.3.1 1.3.1 See also 80079-36
5.3.2 1.2.3 See also 80079-36
5.4 1.3.1 See also 80079-36
5.6.1 1.0.6a Not much additional information
1.1.3
5.6.2 1.3.4 See also 80079-36
5.6.3 1.3.1 See also 80079-36
5.7.1 1.0.6a
1.0.6c
1.2.1
5.7.2 1.3.1 See also 80079-36
5.7.3 1.1.3
5.8.1 1.1.3 See also 80079-36
1.3.1 Limited information in respect of 1.1.3
1.3.4
5.8.2.1 1.3.1 See also 80079-36
5.8.2.2 1.3.1 See also 80079-36
---------------------- Page: 6 ----------------------
SIST EN ISO 80079-37:2016
EN ISO 80079-37:2016 (E)
Clause(s)/sub- Essential Requirements Qualifying remarks/Notes
clause(s) of this EN (ERs) of 2014/34 EU
1.3.2
5.8.2.3 1.3.4 See also 80079-36
5.8.2.4 1.3.4 See also 80079-36
5.8.5.1 1.3.4 See also 80079-36
5.9.3 1.3.4 See also 80079-36
6.1 1.3.1 See also 80079-36
6.2 1.0.6a See also 80079-36
1.1.3 Clause has some limited relevance to ESR
1.2.4
1.2.1
1.3.4
1.4.1
6.3 1.0.6a
1.2.1
6.4 1.0.6a
1.2.1
6.5 1.0.6a
1.2.1
7.1 1.0.6a See also 80079-36
1.2.1 Clause has some limited relevance to ESR
1.2.4
1.3.2
1.3.4
1.4.1
7.2 1.0.6a
1.2.1
7.3 1.0.6a
1.1.3
1.2.1
7.3.3 1.3.1
7.3.4 1.2.3 See also 80079-36
1.3.2

WARNING — Other requirements and other EU Directives may be applicable to the product(s) falling

within the scope of this standard.
---------------------- Page: 7 ----------------------
SIST EN ISO 80079-37:2016
EN ISO 80079-37:2016 (E)
Annex ZB
(informative)
Significant changes between this European Standard and EN 13463-5:2011,
EN 13463-6:2005 and EN 13463-8:2003

This European Standard supersedes EN 13463-5:2011, EN 13463-6:2005 and EN 13463-8:2003.

Table ZB.1 — Significant changes between this European Standard and EN 13463-5:2011,

EN 13463-6:2005 and EN 13463-8:2003
Clauses of this European Standard Type
Minor and Substantial
formal Extension change
changes regarding ESRs
Introduction of new definitions and slight
redefinitions concerning ignition sources to
improve ignition hazard assessment
Clause 3 X X
(EN 13463-5, EN 13463-6, EN 13463-8
Clause 3)
Differentiation in requirements for ingress
prevention for dust and liquids (EN 13463-5, 5.2.2 X
Clause 4.3.4)
Changing note to normative text (EN 13463-5,
5.3.3 X X
Clause 4.4.3)
Note 2 deleted and moved to 5.6 (EN 13463-5,
5.5 X
Clause 4.6)
Additional requirement listed (2 clause)
5.6 X X
(from EN 13463-5, Clause 4.6)
Additional measure listed (EN 13463-5,
5.6.3 X X
Clause 5.3)
Changing of wording regarding information
5.7.1 X
for instructions (EN 13463-5, Clause 6.1)
Changing of wording regarding information
5.7.2 X
for instructions (EN 13463-5, Clause 6.2)
Additional requirement New reference
regarding electrostatic requirements
5.8.2.2 X
(EN 13463-5, note in 7.2.2)
New note
Changing of wording (EN 13463-5,
5.8.2.5 X
Clause 7.6.5)
Changing to clarify dependency of
requirements
5.10 X
(EN 13463-5, Clause 7.3.2)
Differentiation to clarify dependency of 5.11.1 X X
---------------------- Page: 8 ----------------------
SIST EN ISO 80079-37:2016
EN ISO 80079-37:2016 (E)
Clauses of this European Standard Type
Minor and Substantial
formal Extension change
changes regarding ESRs
requirements (EN 13463-5, Clause 8.1)
Additional requirement (EN 13463-5,
5.13.3 X
Clause 10.3)
Editorial modification for clarification
Clause 6 X X
(EN 13463-6, Clause 6.1)
Editorial modification for clarification
7.1 X
(EN 13463-8, Clause 5.1)
Editorial modification for clarification
7.3.2 X
(EN 13463-8, Clause 7.2)
Additional example (EN 13463-8, Clause 7.4) 7.3.4 X
Editorial modification for clarification
7.3.6 X
(EN 13463-8, Clause 7.8)
Introduction of new definitions for marking Clause 10 X X

NOTE 1 The technical changes referred include the significant technical changes from the EN revised but is not

an exhaustive list of all modifications from the previous version.
Explanations:
A) Definitions
Minor and editorial changes clarification
decrease of technical requirements
minor technical change
editorial corrections

Changes in a standard classified as ‘Minor and editorial changes’ refer to changes regarding the

previous standard, which modify requirements in an editorial or a minor technical way. Also changes of

the wording to clarify technical requirements without any technical change are classified as ‘Minor and

editorial changes’.

A reduction in level of existing requirement is also classified as ‘Minor and editorial changes’

Extension addition of technical options

Changes in a standard classified as ‘extension’ refers to changes regarding the previous standard, which

add new or modify existing technical requirements, in a way that new options are given, but without

increasing requirements for equipment that was fully compliant with the previous standard. Therefore

these ‘extensions’ will not have to be considered for products in conformity with the preceding edition.

---------------------- Page: 9 ----------------------
SIST EN ISO 80079-37:2016
EN ISO 80079-37:2016 (E)
Major technical changes addition of technical requirements
increase of technical requirements

Changes in a standard classified as ‘Major technical change’ refer to changes regarding the previous

standard, which add new or increase the level of existing technical requirements, in a way that a

product in conformity with the preceding standard will not always be able to fulfil the requirements

given in the standard. ‘Major technical changes’ have to be considered for products in conformity with

the preceding edition. For every change classified as ‘Major Technical Change’ additional information is

provided in clause B) of the Annex ZB.

NOTE 2 These changes represent current technological knowledge . However, these changes should not

normally have an influence on equipment already placed on the market.
B) Information about the background of ‘Major Technical Changes’
None
see also ATEX Guide 10.3 and Annex ZA.
---------------------- Page: 10 ----------------------
SIST EN ISO 80079-37:2016
ISO 80079-37
Edition 1.0 2016-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Explosive atmospheres –
Part 37: Non-electrical equipment for explosive atmospheres – Non electrical

type of protection constructional safety “c”, control of ignition source “b”, liquid

immersion “k”
Atmosphères explosives –
Partie 37: Appareils non électriques destinés à être utilisés en atmosphères
explosives – Mode de protection non électrique par sécurité de construction "c",
par contrôle de la source d'inflammation "b", par immersion dans un liquide "k"
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.230; 29.260.20 ISBN 978-2-8322-3181-4

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

---------------------- Page: 11 ----------------------
SIST EN ISO 80079-37:2016
– 2 – ISO 80079-37:2016 © ISO 2016
CONTENTS

FOREWORD ......................................................................................................................... 5

1 Scope ............................................................................................................................ 7

2 Normative references..................................................................................................... 7

3 Terms and definitions .................................................................................................... 8

4 Determination of suitability ............................................................................................. 9

5 Requirements for equipment with Type of Protection constructional safety “c” ................. 9

5.1 General requirements ............................................................................................ 9

5.2 Ingress protection ............................................................................................... 10

5.2.1 General ....................................................................................................... 10

5.2.2 Ingress protection in special cases ............................................................... 10

5.3 Seals for moving parts ......................................................................................... 10

5.3.1 Unlubricated gaskets, seals, sleeves, bellows and diaphragms ..................... 10

5.3.2 Stuffing box seals (packed glands) ............................................................... 11

5.3.3 Lubricated seals ........................................................................................... 11

5.4 Equipment lubricants, coolants and fluids ............................................................ 11

5.5 Vibration ............................................................................................................. 11

5.6 Requirements for moving parts ............................................................................ 11

5.6.1 General ....................................................................................................... 11

5.6.2 Clearance .................................................................................................... 12

5.6.3 Lubrication ................................................................................................... 12

5.7 Requirements for bearings .................................................................................. 12

5.7.1 General ....................................................................................................... 12

5.7.2 Lubrication ................................................................................................... 13

5.7.3 Chemical compatibility ................................................................................. 13

5.8 Requirements for power transmission systems ..................................................... 14

5.8.1 Gear drives .................................................................................................. 14

5.8.2 Belt drives ................................................................................................... 14

5.8.3 Chain drives................................................................................................. 15

5.8.4 Other drives ................................................................................................. 15

5.8.5 Hydrostatic, hydrokinetic and pneumatic equipment ...................................... 15

5.9 Requirements for clutches and variable speed couplings ...................................... 16

5.9.1 General ....................................................................................................... 16

5.9.2 Slipping ....................................................................................................... 16

5.9.3 Friction ........................................................................................................ 17

5.10 Flexible couplings ............................................................................................... 17

5.11 Requirements for brakes and braking systems ..................................................... 17

5.11.1 Brakes used only for stopping in emergency ................................................. 17

5.11.2 Service brakes (including friction brakes and fluid based retarders) ............... 18

5.11.3 Parking brakes ............................................................................................. 18

5.12 Requirements for springs and absorbing elements ............................................... 18

5.13 Requirements for conveyor belts ......................................................................... 18

5.13.1 Electrostatic requirements ............................................................................ 18

5.13.2 Materials ...................................................................................................... 18

5.13.3 Belt tension .................................................................................................. 18

5.13.4 Alignment .................................................................................................... 19

5.13.5 Earthing and bonding ................................................................................... 19

---------------------- Page: 12 ----------------------
SIST EN ISO 80079-37:2016
ISO 80079-37:2016 © ISO 2016 – 3 –

6 Requirements for equipment with Type of Protection control of ignition source “b” ......... 19

6.1 General ............................................................................................................... 19

6.2 Determination of the control parameters .............................................................. 19

6.2.1 General ....................................................................................................... 19

6.2.2 Determination of the safety critical values ..................................................... 20

6.3 Ignition prevention system design and settings .................................................... 20

6.3.1 Determining the performance requirements or operating characteristics ........ 20

6.3.2 Instructions .................................................................................................. 20

6.3.3 System lockout ............................................................................................ 20

6.3.4 Operator intervention ................................................................................... 21

6.4 Ignition protection of sensors and actuators ......................................................... 21

6.5 Ignition protection types ...................................................................................... 21

6.5.1 Ignition protection type b1 ............................................................................ 21

6.5.2 Ignition protection type b2 ............................................................................ 21

6.5.3 Application of ignition protection types .......................................................... 22

6.5.4 Requirements for ignition protection types .................................................... 23

6.5.5 Programmable electronic devices ................................................................. 23

7 Requirements for equipment with Type of Protection liquid immersion “k”...................... 23

7.1 Determination of the maximum / minimum criteria ................................................ 23

7.2 Protective liquid .................................................................................................. 24

7.3 Equipment construction ....................................................................................... 24

7.3.1 General ....................................................................................................... 24

7.3.2 Working angle .............................................................................................. 24

7.3.3 Measures to ensure effectiveness of liquid ................................................... 24

7.3.4 Accidental loosening .................................................................................... 25

7.3.5 Level monitoring .......................................................................................... 25

7.3.6 Loss of liquid ............................................................................................... 25

7.3.7 Open equipment .......................................................................................... 26

8 Type tests ................................................................................................................... 26

8.1 Type tests for equipment with Type of Protection constructional safety “c” ............ 26

8.2 Type tests for equipment with Type of Protection control of ignition source

“b” ...................................................................................................................... 26

8.2.1 Determination of control parameters ............................................................. 26

8.2.2 Function and accuracy check of the ignition protection system ...................... 26

8.3 Type tests for equipment with Type of Protection liquid immersion “k” .................. 26

8.3.1 General ....................................................................................................... 26

8.3.2 Increased pressure test on enclosed equipment having a sealed

enclosure that contains static, or flowing protective liquid ............................. 26

8.3.3 Overpressure test on enclosed equipment having a vented enclosure ........... 26

9 Documentation ............................................................................................................ 26

9.1 Documentation for equipment with Type of Protection constructional safety

“c” ....................................................................................................................... 26

9.2 Documentation for equipment with Type of Protection control of ignition

sources “”b” ........................................................................................................ 27

9.3 Documentation for equipment with Type of Protection liquid immersion “k” ........... 27

10 Marking ....................................................................................................................... 28

10.1 General ............................................................................................................... 28

10.2 Safety devices .................................................................................................... 28

---------------------- Page: 13 ----------------------
SIST EN ISO 80079-37:2016
– 4 – ISO 80079-37:2016 © ISO 2016
Annex A (informative) Approach and application: equipment with Type of

Protection “c” ...................................................................................................................... 29

A.1 General remarks regarding ignition hazard assessment ........................................ 29

A.2 Stuffing box seal (see Table A.2) ......................................................................... 29

A.3 Slide ring seal ..................................................................................................... 31

A.4 Radial seal .......................................................................................................... 36

A.5 Belt drives ........................................................................................................... 40

Annex B (normative) Test requirements .............................................................................. 42

B.1 "Dry run" type test for lubricated sealing arrangements ........................................ 42

B.2 Type test for determining the maximum engaging time of clutch assembly ............ 42

B.2.1 Apparatus .................................................................................................... 42

B.2.2 Procedure .................................................................................................... 43

Annex C (informative) Methodology: equipment with Type of Protection “b” ......................... 44

Annex D (informative) Approach to assign the required ignition protection type used

for equipment to achieve different EPL ................................................................................ 45

D.1 For EPL Gc and Dc ............................................................................................. 45

D.2 For EPL Gb and Db ............................................................................................. 45

D.3 For EPL Mb ......................................................................................................... 45

D.4 For EPL Ga and Da ............................................................................................. 46

Annex E (informative) Information on functional safety concept ........................................... 47

E.1 ISO 13849-1 ....................................................................................................... 47

E.2 IEC 61508-1 ........................................................................................................ 47

E.3 IEC 62061 ........................................................................................................... 47

E.4 Reliability according to functional safety standards .............................................. 47

Bibliography ....................................................................................................................... 49

Figure C.1 – Flow diagram of the procedures described in this document ............................. 44

Table 1 – Minimum ignition protection types required when Ex “b” is selected to

achieve the intended EPL for Group II and III equipment...................................................... 22

Table 2 – Minimum ignition protection types required when Ex “b” is selected
...

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