IEC 60079-1:2007

Explosive atmospheres - Part 1: Equipment protection by flameproof enclosures "d"

Contains specific requirements for the construction and testing of electrical apparatus with the type of protection flameproof enclosure 'd', intended for use in explosive gas atmospheres. This edition contains significant technical changes with regard to the previous edition. The contents of the corrigendum of September 2008 have been included in this copy.

Atmosphères explosives - Partie 1: Protection du matériel par enveloppes antidéflagrantes "d"

Contient les exigences spécifiques de construction et d'essai du matériel électrique à enveloppe antidéflagrante, mode de protection «d», destiné à être utilisé dans les atmosphères explosives gazeuses. Cette édition inclut les modifications techniques majeures par rapport à l'édition précédente. Le contenu du corrigendum de septembre 2008 a été pris en considération dans cet exemplaire.

General Information

• Status: Published
• Publication Date: 26-Apr-2007
• ICS: 29.260.20 - Electrical apparatus for explosive atmospheres
• Technical Committee: TC 31 - Equipment for explosive atmospheres
• Drafting Committee: MT 60079-1 - TC 31/MT 60079-1
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 27-Jun-2014

Relations

• Corrected By: IEC 60079-1:2007/COR1:2008 - Corrigendum 1 - Explosive atmospheres - Part 1: Equipment protection by flameproof enclosures "d"
• Effective Date: 05-Sep-2023
• Revises: IEC 60079-1:2003 - Electrical apparatus for explosive gas atmospheres - Part 1: Flameproof enclosures "d"
• Effective Date: 05-Sep-2023
• Revised: IEC 60079-1:2014 - Explosive atmospheres - Part 1: Equipment protection by flameproof enclosures "d"
• Effective Date: 05-Sep-2023
• Revises: IEC 60079-1:2003/ISH1:2007 - Interpretation sheet 1 - Electrical apparatus for explosive gas atmospheres - Part 1: Flameproof enclosures "d"
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60079-1
Edition 6.0 2007-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Explosive atmospheres –
Part 1: Equipment protection by flameproof enclosures “d”

Atmosphères explosives –
Partie 1: Protection du matériel par enveloppes antidéflagrantes «d»

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IEC 60079-1
Edition 6.0 2007-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Explosive atmospheres –
Part 1: Equipment protection by flameproof enclosures “d”

Atmosphères explosives –
Partie 1: Protection du matériel par enveloppes antidéflagrantes «d»

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XB
CODE PRIX
ICS 29.260.20 ISBN 2-8318-9116-7

– 2 – 60079-1 © IEC:2007
CONTENTS
FOREWORD.5

1 Scope.7

2 Normative references .7

3 Terms and definitions .8

4 Equipment grouping and temperature classification .10

5 Flameproof joints.10
5.1 General requirements.10
5.2 Non-threaded joints .11
5.3 Threaded joints .17
5.4 Gaskets (including O-rings) .18
5.5 Equipment using capillaries.19
6 Cemented joints .20
6.1 General .20
6.2 Mechanical strength .20
6.3 Width of cemented joints .20
7 Operating rods .20
8 Supplementary requirements for shafts and bearings .20
8.1 Joints of shafts .20
8.2 Bearings.23
9 Light-transmitting parts.23
10 Breathing and draining devices which form part of a flameproof enclosure .24
10.1 Openings for breathing or draining .24
10.2 Composition limits .24
10.3 Dimensions .24
10.4 Elements with measurable paths .24
10.5 Elements with non-measurable paths .24
10.6 Removable devices .25
10.7 Mounting arrangements of the elements .25
10.8 Mechanical strength .25
10.9 Breathing devices and draining devices when used as Ex components.25

11 Fasteners, associated holes and blanking elements .28
12 Materials and mechanical strength of enclosures – Materials inside the enclosures.30
13 Entries for flameproof enclosures .31
13.1 Cable glands .31
13.2 Conduit sealing devices.32
13.3 Plugs and sockets and cable couplers .32
13.4 Bushings .33
14 Verification and tests .33
15 Type tests .34
15.1 Tests of ability of the enclosure to withstand pressure.35
15.2 Test for non-transmission of an internal ignition .38
15.3 (Reserved for future use) .41
15.4 Tests of flameproof enclosures with breathing and draining devices .42

60079-1 © IEC:2007 – 3 –
16 Routine tests .44

17 Switchgear for group I .45

17.1 Means of isolation .45

17.2 Doors or covers.45

18 Lampholders and Iamp caps.46

18.1 Device preventing lamps working loose .46

18.2 Holders and caps for lamps with cylindrical caps .46

18.3 Holders for lamps with threaded caps.46

19 Non-metallic enclosures and non-metallic parts of enclosures .46

19.1 (Reserved for future use) .47
19.2 Special constructional requirements .47
19.3 Supplementary requirements for type tests.47
20 Marking .48
20.1 General .48
20.2 Caution and warning markings .48
20.3 Informative markings .48
Annex A (normative)  Additional requirements for crimped ribbon elements and
multiple screen elements of breathing and draining devices .49
Annex B (normative) Additional requirements for elements, with non-measurable
paths, of breathing and draining devices .50
B.1 Sintered metal elements.50
B.2 Pressed metal wire elements.50
B.3 Metal foam elements .51
Annex C (normative) Additional requirements for flameproof entry devices .52
C.1 General .52
C.2 Constructional requirements.52
C.3 Type tests .54
Annex D (normative) Empty flameproof enclosures as Ex components.59
D.1 General .59
D.2 Introductory remarks .59
D.3 Ex component enclosure requirements .59
D.4 Utilization of an Ex component enclosure certificate to prepare an equipment
certificate .61
Annex E (normative) Cells and batteries used in flameproof “d” enclosures .62
E.1 Introductory remarks .62

E.2 Acceptable electrochemical systems .62
E.3 General requirements for cells (or batteries) inside flameproof enclosures .6
...