EN 60079-1:2014

SLOVENSKI STANDARD
01-januar-2015
(NVSOR]LYQHDWPRVIHUHGHO=DãþLWDRSUHPH]QHSURGLUQLPRNURYRPG
Explosive atmospheres - Part 1: Equipment protection by flameproof enclosures "d"
Explosionsgefährdete Bereiche - Teil 1: Geräteschutz durch druckfeste Kapselung „d“
Atmosphères explosives - Partie 1: Protection de l'appareil par enveloppes
antidéflagrantes "d"
Ta slovenski standard je istoveten z: EN 60079-1:2014
ICS:
29.260.20 (OHNWULþQLDSDUDWL]D Electrical apparatus for
HNVSOR]LYQDR]UDþMD explosive atmospheres
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 60079-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2014
ICS 29.260.20 Supersedes EN 60079-1:2007
English Version
Explosive atmospheres - Part 1: Equipment protection by
flameproof enclosures "d"
(IEC 60079-1:2014)
Atmosphères explosives - Partie 1: Protection de l'appareil Explosionsgefährdete Bereiche - Teil 1: Geräteschutz
par enveloppes antidéflagrantes "d" durch druckfeste Kapselung "d"
(CEI 60079-1:2014) (IEC 60079-1:2014)
This European Standard was approved by CENELEC on 2014-08-01. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60079-1:2014 E
Foreword
The text of document 31/1111/FDIS, future edition 7 of IEC 60079-1, prepared by IEC/TC 31 "Equipment for
explosive atmospheres" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
(dop) 2015-05-01
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2017-08-01
• latest date by which the national
standards conflicting with the
document have to be withdrawn
This document supersedes EN 60079-1:2007.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights.

This document has been prepared under a mandate given to CENELEC by the European Commission and
the European Free Trade Association, and supports essential requirements of EU Directive.

For the relationship with EU Directive see informative Annex ZZ, which is an integral part of this document.

Endorsement notice
The text of the International Standard IEC 60079-1:2014 was approved by CENELEC as a European
Standard without any modification.

- 3 - EN 60079-1:2014
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD

applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60061 -  Lamp caps and holders together with gauges - -
for the control of interchangeability and safety
IEC 60079-0 (mod) -  Explosive atmospheres - Part 0: Equipment - EN 60079-0 -
General requirements
+A11 2013
IEC 60079-7 -  Explosive atmospheres - Part 7: Equipment EN 60079-7 -
protection by increased safety "e"
IEC 60079-11 -  Explosive atmospheres - Part 11: Equipment EN 60079-11 -
protection by intrinsic safety "i"
IEC 60079-15 -  Explosive atmospheres - Part 15: Equipment EN 60079-15 -
protection by type of protection "n"
IEC 60127 series Miniature fuses EN 60127 series
ISO 965-1 -  ISO general purpose metric screw threads - - -
Tolerances – Part 1: Principles and basic data
ISO 965-3 -  ISO general purpose metric screw threads - - -
Tolerances – Part 3: Deviations for
constructional screw threads
ISO 2738 -  Sintered metal materials, excluding EN ISO 2738 -
hardmetals - Permeable sintered metal
materials - Determination of density, oil
content and open porosity
ISO 4003 -  Permeable sintered metal materials - EN 24003 -
Determination of bubble test pore size
ISO 4022 -  Permeable sintered metal materials - EN ISO 4022 -
Determination of fluid permeability
ANSI/ASME B 1.20.1 -  - -
Annex ZY
(informative)
Significant changes between this European Standard and EN 60079-1:2007
This European Standard supersedes EN 60079-1:2007.
The significant changes with respect to EN 60079-1:2007 are as listed below.

Type
Significant Changes Clause Minor and Extension Major
editorial technical
changes changes
Normative references 2 X
(Removal of the edition date from the reference for          IEC
60079-0)
Requirements for level of protection “da” 4.2 X
(Catalytic sensors for combustible gas detectors)
Requirements for level of protection “dc” 4.4, 15.5 X
(“Enclosed break” devices from IEC 60079-15)
Flameproof joints, General requirements 5.1 X
(Documentation clarification and examples of corrosion inhibiting
grease)
Flameproof joints, General requirements 5.1 X
(Specific Conditions of Use that joints are not intended to be
repaired)
Flameproof joints, General requirements 5.1 X
(Electroplating more than 0.008 mm think)
Non-threaded joints, Gap (i) 5.2.2 X
(Intentional gaps between surface for flanged joints)
Serrated joints 5.2.8 X
(Use and test requirements)
Multi-step joints 5.2.9 X
(Not less than 3 adjacent segments and two path changes)
Minimum width of joint and maximum gap for enclosures of groups Table 2  X
IIA and IIB
(Maximum gaps for flanged, cylindrical or spigot joints of 9,5 mm
minimum width and volume greater than 2,000 cm3)
Minimum width of joint and maximum gap for enclosures of groups I, Table 2, X
IIA, IIB and IIC Table 3
(ISO 80000-1 for constructional value rounding)
Cylindrical threaded joints Table 4 X
(ISO 965-1 standard in respect of thread form or quality of fit)
Taper threaded joints Table 5 X
(External and internal thread construction)
Cemented joints
6.1.2  C1
(Supplemental mechanical means of securement)
Cemented joints                                         6.1.2 X
(Evaluation criteria if there is leakage)
Fused glass joints 6.2 X
(Glass-to-metal joints)
- 5 - EN 60079-1:2014
Type
Significant Changes Clause Minor and Extension Major
editorial technical
changes changes
Thermal tests of breathing and draining devices 10.9.3.2 X
(Temperature class based on external surface temperature after the
10 min test period)
Test of the ability of the breathing and draining device to withstand 10.9.3.4 X
pressure
(Relocated from before thermal tests to after the non-transmission
test)
Ex component certificate 10.9.4 X
(Service temperature range for non-metallic enclosures per IEC
60079-0)
Fasteners and openings 11 X
(Relocation of blanking element content to Clauses 13.8 and C.2.3)
Fasteners and openings, Property class or yield stress 11.3 X
(Certificate specific condition of use)
Fasteners and openings 11.8 X
(Openings in the wall of the enclosure)
Materials 12.8   C2
(Material limitation in acetylene atmospheres)
Entries for flameproof enclosures, General 13.1 X
(Metric and NPT threaded entries)
Entries for flameproof enclosures, General 13.1 X
(Group I non-threaded joints)
Entries for flameproof enclosures, Non-threaded holes 13.3 X
(Group I application)
Entries for flameproof enclosures, Cable glands 13.4 X
(Group I application)
Cable glands, Conduit sealing devices 13.4,13.5 X
(Documentation to facilitate mounting)
Plugs and sockets and cable couplers 13.6.4  C3
(Load requirement for arc-quenching test)
Bushings 13.7 X
(Documentation to facilitate mounting)
Blanking elements 13.8 X
(Relocated from Clause 11)
Verification and tests Table 6 X
(Maximum surface temperature conditions)
Type tests 15 X
(Sequence and number of samples for tests)
Determination of explosion pressure, General 15.2.2.2 X
(Devices that can cause turbulence)
Determination of explosion pressure, General 15.2.2.2 X
(Number of tests for Group IIC)
Determination of explosion pressure, General 15.2.2.4 X
(Pressure pilling for Group IIB)
Determination of explosion pressure, General 15.2.2.5 X
(Equipment marked for a single gas)
Overpressure test, General 15.2.3 X
(Low ambient overpressure tests not required)

Type
Significant Changes Clause Minor and Extension Major
editorial technical
changes changes
Overpressure test – First method (static) 15.2.3.2 X
(3 times option when routine batch testing)
Overpressure test – First method (static) 15.2.3.2 X
(Adjustment for low ambient due to small size of equipment)
Overpressure test – Second method (dynamic) 15.2.3.3 X
(Number of tests to be made)
Test for non-transmission of an internal ignition 15.3 X
(Clarification regarding grease)
Reduction in length of a threaded joint for non-transmission test Table 9 X
(ISO 965-1 and 965-3 standards in respect of thread form and
quality of fit)
Test factors to increase pressure or test gap Table 10 X
(Group IIC adjustments for elevated ambients)
Test for non-transmission of an internal ignition, Groups I, IIA and IIB 15.3.2.3 X
(Number of tests to be made)
Test for non-transmission of an internal ignition, Group IIC testing by 15.3.3.2 X
increased gap
(Number of tests to be made)
Test for non-transmission of an internal ignition, Group IIC 15.3.3.4 X
(Oxygen enrichment of test gases)
Thermal tests of enclosures with breathing and draining devices 15.4.3.1 X
(Temperature class based on external surface temperature after the
10 min test period)
Tests for “dc” devices 15.5 X
(“Enclosed break” devices from IEC 60079-15)
Routine tests, General 16.1.2 X
(Adjustment for low ambient due to small size of equipment)
Routine tests, General 16.1.3 X
(Options when second method is chosen)
Routine tests, General 16.3 X
(Welded joint inspection options)
Routine tests, General 16.6 X
(Allowance for batch testing)
Switchgear for Group I 17.2.2, X
(Clarifying need for compliance with EPL Mb types of protection) 17.2.3
Non-metallic enclosures and non-metallic parts of enclosures, 19.1 X
General
(Exception for cemented joints)
Non-metallic enclosures and non-metallic parts of enclosures, 19.2 X
Resistance to tracking and creepage distances
(Reference to both IEC 60079-7 and or IEC 60079-15)
Non-metallic enclosures and non-metallic parts of enclosures, 19.3 X
Requirements for type tests
(Clarification of test sequence)

- 7 - EN 60079-1:2014
Type
Significant Changes Clause Minor and Extension Major
editorial technical
changes changes
Instructions 21 X
(Indication that repair of flamepaths is not intended)
Bushings C.2.1.4 X
(Documentation regarding numbers of cores)
Bushings C.2.1.4 X
(Criteria for non-transmission test)
Bushings C.2.1.4 X
(Evaluation criteria if there is leakage)
Flameproof joints, Threaded joints C.2.2.1 X
(Requirement options)
Flameproof joints, Non-threaded joints C.2.2.2 X
(Group I application)
Constructional requirements for Ex blanking elements C.2.3.1 X
(Relocated from Clause 11)
Constructional requirements for Ex blanking elements C.2.3.2, X
(Metric and NPT Ex blanking elements) C.2.3.3
Constructional requirements for Ex blanking elements C.2.3.4 X
(Group I non-threaded construction)
Sealing test, General C.3.1.1 X
(Allowance for re-tightening)
Cable glands and conduit sealing devices with sealing ring C.3.1.2 X
(Mandrel to be corrosion-resistant metal)
Type tests for Ex blanking elements, Torque test C.3.3.1 X
(Test-block to be steel)
Tightening torque values Table C.1 X
(Addition of < 16 mm thread size)
Tightening torque values Table C.2 X
(Addition of NPT thread sizes)
Ex component enclosure requirements D.3.8  C4
(Markings content)
Ex component enclosure requirements D.3.10 X
(Certificate content)
Utilization of an Ex component enclosure certificate to D.4.1 X
prepare an equipment certificate, Procedure
(Devices that can create significant turbulence)
Acceptable primary cells Table E.1 X
(Addition of Type B cells)
Acceptable primary cells Table E.1  C5
(Removal of Type T cells)
Acceptable secondary cells Table E.2 X
(Addition of Lithium type cells)
Prevention of excessive temperature and cell damage E.4.1
...