SIST EN 60079-1:2007
Explosive atmospheres -- Part 1: Equipment protection by flameproof enclosures d
Explosive atmospheres -- Part 1: Equipment protection by flameproof enclosures d
This part of IEC 60079 contains specific requirements for the construction and testing of electrical equipment with the type of protection flameproof enclosure "d", intended for use in explosive gas atmospheres. This standard supplements and modifies the general requirements of IEC 60079-0. Where a requirement of this standard conflicts with a requirement of IEC 60079-0, the requirement of this standard will take precedence.
Explosionsfähige Atmosphäre - Teil 1: Geräteschutz durch druckfeste Kapselung d
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.
Eksplozivne atmosfere - 1. del: Zaščita opreme z neprodirnim okrovom "d" (IEC 60079-1:2007)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 60079-1:2007
01-november-2007
1DGRPHãþD
SIST EN 60079-1:2004
(NVSOR]LYQHDWPRVIHUHGHO =DãþLWDRSUHPH]QHSURGLUQLPRNURYRPG ,(&
Explosive atmospheres - Part 1: Equipment protection by flameproof enclosures "d"
Explosionsfähige Atmosphäre - Teil 1: Geräteschutz durch druckfeste Kapselung "d"
Atmospheres explosives - Partie 1: Protection du matériel par enveloppes
antidéflagrantes «d»
Ta slovenski standard je istoveten z: EN 60079-1:2007
ICS:
29.260.20 (OHNWULþQLDSDUDWL]D Electrical apparatus for
HNVSOR]LYQDR]UDþMD explosive atmospheres
SIST EN 60079-1:2007 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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EUROPEAN STANDARD
EN 60079-1
NORME EUROPÉENNE
July 2007
EUROPÄISCHE NORM
ICS 29.260.20 Supersedes EN 60079-1:2004
English version
Explosive atmospheres -
Part 1: Equipment protection by flameproof enclosures "d"
(IEC 60079-1:2007)
Atmosphères explosives - Explosionsfähige Atmosphäre -
Partie 1: Protection du matériel Teil 1: Geräteschutz durch
par enveloppes antidéflagrantes "d" druckfeste Kapselung "d"
(CEI 60079-1:2007) (IEC 60079-1:2007)
This European Standard was approved by CENELEC on 2007-07-01. CENELEC 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 Central Secretariat or to any CENELEC 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 CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60079-1:2007 E
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EN 60079-1:2007 - 2 -
Foreword
The text of document 31/680/FDIS, future edition 6 of IEC 60079-1, prepared by IEC TC 31, Equipment
for explosive atmospheres, was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 60079-1 on 2007-07-01.
This European Standard supersedes EN 60079-1:2004 + Corrigendum April 2006.
EN 60079-1:2007 contains the following significant technical changes with regard to EN 60079-1:2004:
– revisions to Clause 5 regarding markings and conditions of safe use when a dimension of a flameproof
joint is other than the relevant minimum or maximum;
– revisions to Table 1 regarding maximum gap for flanged, cylindrical or spigot joints;
– revisions to Table 4 regarding requirements for taper threaded joints;
– revisions to Clause 10 regarding volume restrictions and test conditions associated with breathing and
draining devices;
– revisions to Clause 11 regarding requirements for fasteners, associated holes and blanking elements;
– revisions to Clause 12 regarding material restrictions associated with zinc and zinc alloys;
– revisions to Table 5 regarding conditions for the determination of maximum surface temperatures;
– revisions to Clause 15 regarding the determination of explosion pressure (reference pressure);
– revisions to Table 6 regarding the reduction in length of a threaded joint for nontransmission testing;
– revisions to Table 7 regarding the test factors to increase pressure or test gap (iE);
– revisions to Table 8 regarding the minimum distance of obstructions from flange openings;
– revisions to Clause 19 regarding tests for flameproofness;
– revisions to Clause 20 regarding a tabulated collection of marking requirements;
– revisions to Annex C regarding additional requirements for flameproof entry devices;
– revisions to Annex D regarding empty flameproof enclosures as Ex components;
– addition of a new Annex F regarding mechanical properties for screws and nuts; and
– addition of a new Annex G regarding equipment protection levels for Ex equipment.
This standard is to be used in conjunction with EN 60079-0:2004.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2008-04-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2010-07-01
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- 3 - EN 60079-1:2007
This European Standard has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and covers essential requirements of
EC Directive ATEX (94/9/EC). See Annex ZZ.
Annexes ZA and ZZ have been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60079-1:2007 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60034-1 NOTE Harmonized as EN 60034-1:2004 (not modified).
IEC 60079 NOTE Harmonized in EN 60079 series (not modified).
IEC 60079-2 NOTE Harmonized as EN 60079-2:2004 (not modified).
IEC 60079-6 NOTE Harmonized as EN 60079-6:2007 (not modified).
IEC 60079-15 NOTE Harmonized as EN 60079-15:2005 (not modified).
IEC 60079-18 NOTE Harmonized as EN 60079-18:2004 (not modified).
IEC 60079-26 NOTE Harmonized as EN 60079-26:2007 (not modified).
IEC 60079-28 NOTE Harmonized as EN 60079-28:2007 (not modified).
IEC 61241-0 NOTE Harmonized as EN 61241-0:2006 (modified).
IEC 61241-4 NOTE Harmonized as EN 61241-4:2006 (not modified).
IEC 61241-10 NOTE Harmonized as EN 61241-10:2004 (not modified).
IEC 61241-11 NOTE Harmonized as EN 61241-11:2006 (not modified).
IEC 61241-18 NOTE Harmonized as EN 61241-18:2004 (not modified).
IEC 61508 NOTE Harmonized in EN 61508 series (not modified).
__________
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EN 60079-1:2007 - 4 -
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application 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.
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
IEC 60061 Series Lamp caps and holders together with gauges EN 60061 Series
for the control of interchangeability and safety
IEC 60079-0 (mod) 2004 Electrical apparatus for explosive gas EN 60079-0 2006
atmospheres -
Part 0: General requirements
1)
IEC 60079-1-1 - Electrical apparatus for explosive gas - -
atmospheres -
Part 1-1: Flameproof enclosures "d" - Method
of test for ascertainment of maximum
experimental safe gap
1) 2)
IEC 60079-7 - Explosive atmospheres - EN 60079-7 2007
Part 7: Equipment protection by increased
safety "e"
1) 2)
IEC 60079-11 - Explosive atmospheres - EN 60079-11 2007
Part 11: Equipment protection by intrinsic
safety "i"
IEC 60079-14 2002 Electrical apparatus for explosive gas EN 60079-14 2003
atmospheres -
Part 14: Electrical installations in hazardous
areas (other than mines)
3)
IEC 60086-1 2000 Primary batteries - EN 60086-1 2001
Part 1: General
1) 2)
IEC 60112 - Method for the determination of the proof EN 60112 2003
and the comparative tracking indices of solid
insulating materials
IEC 60127 Series Miniature fuses EN 60127 Series
IEC 60529 1989 Degrees of protection provided EN 60529 1991
by enclosures (IP Code) + corr. May 1993
IEC 60623 2001 Secondary cells and batteries containing EN 60623 2001
alkaline or other non-acid electrolytes -
Vented nickel-cadmium prismatic
rechargeable single cells
1)
Undated reference.
2)
Valid edition at date of issue.
3)
EN 60086-1 is superseded by EN 60086-1:2007, which is based on IEC 60086-1:2006.
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- 5 - EN 60079-1:2007
Publication Year Title EN/HD Year
4)
IEC 60662 (mod) 1980 High pressure sodium vapour lamps EN 60662 1993
1) 2)
IEC 60695-11-10 - Fire hazard testing - EN 60695-11-10 1999
Part 11-10: Test flames - 50 W horizontal and
vertical flame test methods
IEC 61951-1 2003 Secondary cells and batteries containing EN 61951-1 2003
alkaline or other non-acid electrolytes -
Portable sealed rechargeable single cells -
Part 1: Nickel-cadmium
IEC 61951-2 2003 Secondary cells and batteries containing EN 61951-2 2003
alkaline or other non-acid electrolytes -
Portable sealed rechargeable single cells -
Part 2: Nickel-metal hydride
ISO 185 1988 Grey cast iron - Classification - -
ISO 965-1 1998 ISO general-purpose metric screw threads - - -
Tolerances -
Part 1: Principles and basic data
ISO 965-3 1998 ISO general-purpose metric screw threads - - -
Tolerances -
Part 3: Deviations for constructional threads
ISO 2738 1999 Sintered metal materials, excluding hard EN ISO 2738 1999
metals - Permeable sintered metal materials -
Determination of density, oil content and open
porosity
ISO 3864 1984 Safety colours and safety signs - -
ISO 4003 1977 Permeable sintered metal materials - EN 24003 1993
Determination of bubble test pore size
ISO 4022 1987 Permeable sintered metal materials - EN ISO 4022 2006
Determination of fluid permeability
ANSI/ASME 1983 Pipe threads, general purpose (inch) - -
B1.20.1
4)
EN 60662 includes A1:1986 (mod) + A2:1987 (mod) + A3:1990 (mod) to IEC 60662 (mod).
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EN 60079-1:2007 - 6 -
Annex ZZ
(informative)
Coverage of Essential Requirements of EC Directives
This European Standard has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and within its scope the standard covers only the
following essential requirements out of those given in Annex II of the EC Directive 94/9/EC:
– ER 1.0.1, ER 1.0.2, ER 1.0.3 (partly), ER 1.0.4 (partly)
– ER 1.1 (partly)
– ER 1.2.1 (partly), ER 1.2.2 (partly), ER 1.2.6, ER 1.2.8 (partly), ER 1.2.9
– ER 1.3.1 (partly), ER 1.3.4 (partly)
– ER 1.5.1
st
– ER 1.6.4 1 paragraph (partly)
– ER 2.0.2.1, ER 2.0.2.2 (partly), ER 2.0.2.3 (partly)
– ER 2.2.1.1, ER 2.2.1.2 (partly), ER 2.2.1.3 (partly)
Compliance with this standard provides one means of conformity with the specified essential
requirements of the Directive concerned.
WARNING: Other requirements and other EC Directives may be applicable to the products falling within
the scope of this standard.
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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
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– 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
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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 .63
E.4 Arrangement of safety devices .63
E.5 Recharging of secondary cells inside flameproof enclosures .65
E.6 Rating of protection diodes and reliability of protection devices .66
Annex F (informative) Mechanical properties for screws and nuts .67
Annex G (informative) Introduction of an alternative risk assessment method
encompassing “equipment protection levels’ for Ex equipment .68
G.0 Introduction .68
G.1 Historical background.68
G.2 General .69
G.3 Risk of ignition protection afforded .70
G.4 Implementation.71
Bibliography.73
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– 4 – 60079-1 © IEC:2007
Figure 1 – Example of construction for indirect checking of a flanged group I
flameproof joint.11
Figures 3, 4, 5 – Holes in surfaces of flanged joints .14
Figures 6, 7, 8 – Holes in surfaces of spigot joints .14
Figure 9a – Example of a joint with partial cylindrical surfaces.15
Figure 9b – Example of serrated joint.15
Figures 10 to 16 – Illustration of the requirements concerning gaskets .19
Figure 17 – Example of cylindrical joint for shaft of rotating electrical machine .21
Figure 18 – Example of labyrinth joint for shaft of rotating electrical machine.22
Figure 19 – Example of joint with floating gland for shaft of rotating electrical machine.22
Figure 20 – Joints of shaft glands of rotating electrical machines.23
Figure 21 – Component test rig for breathing and draining devices .27
Figure 22 – Examples of blanking elements for unused apertures .30
Figure C.1 – Device for the sealing tests for cable glands.55
Figure C.2 – Examples of Ex thread adapters .58
Figure E.1 – Fitting of diode arrangement for three cells in series.64
Figure E.2 – Fitting of blocking diodes to meet E.4.3 (third example) .65
Table 1 – Minimum width of joint and maximum gap for enclosures of groups I, IIA and IIB .16
Table 2 – Minimum width of joint and maximum gap for group IIC enclosures .17
Table 3 – Cylindrical threaded joints .17
a
Table 4 – Taper threaded joints .18
Table 5 – Conditions for the determination of maximum surface temperature.34
Table 6 – Reduction in length of a threaded joint for non-transmission test .39
Table 7 – Test factors to increase pressure or test gap (i ) .39
E
Table 9 − Text of caution or warning markings .48
Table 10 − Text of informative markings.48
Table C.1 – Tightening torque values.57
Table E.1 – Acceptable primary cells .62
Table E.2 – Acceptable secondary cells.63
Table F.1 – Mechanical properties for screws and nuts.67
Table G.1 – Traditional relationship of EPLs to zones (no additional risk assessment).70
Table G.2 – Description of risk of ignition protection provided.71
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60079-1 © IEC:2007 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
EXPLOSIVE ATMOSPHERES –
Part 1: Equipment protection by flameproof enclosures “d”
FOREWORD
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