EN 60079-2:2014

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Explosionsgefährdete Bereiche - Teil 2: Geräteschutz durch Überdruckkapselung “ p“ (IEC 60079-2:2014)Atmosphères explosives - Partie 2: Protection du matériel par enveloppe à surpression interne "p" (IEC 60079-2:2014)Explosive atmospheres - Part 2: Equipment protection by pressurized enclosure "p" (IEC 60079-2:2014)29.260.20Electrical apparatus for explosive atmospheresICS:Ta slovenski standard je istoveten z:EN 60079-2:2014SIST EN 60079-2:2015en01-april-2015SIST EN 60079-2:2015SLOVENSKI
STANDARDSIST EN 61241-4:2007SIST EN 60079-2:20081DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 60079-2
December 2014 ICS 29.260.20
Supersedes
EN 60079-2:2007, EN 61241-4:2006
English Version
Explosive atmospheres - Part 2: Equipment protection by pressurized enclosure "p" (IEC 60079-2:2014)
Atmosphères explosives - Partie 2: Protection du matériel par enveloppe à surpression interne "p" (IEC 60079-2:2014)
Explosionsgefährdete Bereiche - Teil 2: Geräteschutz durch Überdruckkapselung "p" (IEC 60079-2:2014) This European Standard was approved by CENELEC on 2014-08-25. 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 60079-2:2014 E SIST EN 60079-2:2015

This document supersedes EN 60079-2:2007 and EN 61241-4:2006. The State of the Art is included in Annex ZY “Significant changes between this European Standard and EN 60079-2:2007”. For the significant changes with respect to EN 60079-2:2007, see Annex ZY. This standard is to be read in conjunction with EN 60079-0. 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(s). For the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of this document. Endorsement notice The text of the International Standard IEC 60079-2:2014 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 60051 NOTE Harmonized in EN 60051 series. IEC 60079-1 NOTE Harmonized as EN 60079-1. IEC 60079-5 NOTE Harmonized as EN 60079-5. IEC 60079-6 NOTE Harmonized as EN 60079-6. SIST EN 60079-2:2015

- 3 - EN 60079-2:2014 IEC 60079-7 NOTE Harmonized as EN 60079-7. IEC 60079-13 NOTE Harmonized as EN 60079-13. IEC 60079-18 NOTE Harmonized as EN 60079-18. IEC 60079-20-1 NOTE Harmonized as EN 60079-20-1. IEC 60079-26 NOTE Harmonized as EN 60079-26. IEC 60079-28 NOTE Harmonized as EN 60079-28. IEC 61511 NOTE Harmonized in EN 61511 series.
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 60034-5 -
Rotating electrical machines - Part 5: Degrees of protection provided by the integral design of rotating electrical machines (IP code) - Classification EN 60034-5 -
IEC 60050 series
International Electrotechnical Vocabulary
- - IEC 60079-0
-
Explosive atmospheres - Part 0: Equipment - General requirements EN 60079-0 -
IEC 60079-11 -
Explosive atmospheres - Part 11: Equipment protection by intrinsic safety "i" EN 60079-11 -
IEC 60079-15 -
Explosive atmospheres - Part 15: Equipment protection by type of protection "n" EN 60079-15 -
IEC 60112 -
Method for the determination of the proof and the comparative tracking indices of solid insulating materials EN 60112 -
IEC 60127 series
Miniature fuses
EN 60127 series
IEC 60529 -
Degrees of protection provided by enclosures (IP Code) EN 60529 -
IEC 60664-1 -
Insulation coordination for equipment within low-voltage systems - Part 1: Principles, requirements and tests EN 60664-1 -
- 5 - EN 60079-2:2014 Annex ZZ (informative)
Coverage of Essential Requirements of EU 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 EU Directive 94/9/EC: – ER 1.0.1 to ER 1.0.6; – ER 1.2.1, ER 1.2.2 (partly), ER 1.2.3, ER 1.2.4 (partly), ER 1.2.6 to ER 1.2.8; – ER 1.3.1, ER 1.3.5; – ER 1.4.1 (partly); – ER 1.5.1 to ER 1.5.8; – ER 1.6.2 (partly), ER 1.6.3 to ER 1.6.5; – ER 2.0.2.1, ER 2.0.2.2; – ER 2.2.1, ER 2.2.1.1 to ER 2.2.1.3; – ER 2.2.2.1 to 2.2.2.4; – ER 2.3.1, ER 2.3.1.1, ER 2.3.1.2; – ER 2.3.2.1 to 2.3.2.3. Compliance with this standard provides one means of conformity with the specified essential requirements of the Directive[s] concerned. WARNING: Other requirements and other EU Directives may be applicable to the products falling within the scope of this standard. SIST EN 60079-2:2015

Significant changes between this European Standard and EN 60079-2:2007 This European Standard supersedes EN 60079-2:2007. The significant changes with respect to EN 60079-2:2007 are as listed below. Table ZY.1
Type Changes Clause Minor and editorial changes Extension Major technical changes Scope
Expanded to include combustible dust 1
X
Protective Gas
Replaced “apparatus” with “equipment” 3
Protective Gas
Revised to show that purging is not required for explosive dust atmospheres 3.16 X
Level of Protection “pxb”
Term and definitions revised to reflect EPL and level of protection 3.21 X
Level of Protection “pyb”
Term and definitions revised to reflect EPL and level of protection 3.22 X
Level of Protection “pzc”
Term and definitions revised to reflect EPL and level of protection 3.23 X
Lower Flammable Limit
Term and definition revised to agree with 60079-0 3.26 X
Upper Flammable Limit
Term and definition revised to agree with 60079-0 3.27 X
Table 1 – Determination of protection level
Revised to use EPL terminology Table 1 X
Table 2 – Design Criteria based upon level of protection
Revised to use EPL terminology Table 2 X
Enclosure
Requirements relaxed for specific designs 5.1
X
Group II and Group III pressurized enclosures
Text revised to use EPL terminology 5.3.3 X
Group II and Group III Level of Protection “pxb”
Added that warning also applies for explosive dust atmospheres 5.3.5
X
- 7 - EN 60079-2:2014
Type Changes Clause Minor and editorial changes Extension Major technical changes Group II and Group III door and cover warning
Added that warning also applies for explosive dust atmospheres 5.3.6
X
Group II and Group III door and cover warning
Revised warning from atmosphere “may be present” to “is present” 5.3.6 X
Mechanical Strength
Removed reference to 60079-0 by clause number for “X” condition 5.4 X
Spark and particle barriers
Removed reference to 60079-0 by clause number for “X” condition 5.9 X
Cells and batteries
Added requirements for cells and batteries 5.10
C1 For Level of Protection “pxb” or Level of Protection “pyb”
Revised Table to use terminology consistent with EPLs 6.2 X
Suitability of safety devices for hazardous area
Word “explosion” changed to “ignition” to reflect UFL/LFL terms 7.1 X
Integrity of safety devices
Added requirement for detecting fan failure 7.2
C2 Table 3 – Safety devices based upon Level of Protection
Revised column labels to use Level of Protection terminology Table 3 X
Provider of safety devices
Remove reference to 60079-0 by clause number for “X” condition 7.3 X
Pressurization System evaluated as associated equipment
Added requirements for pressurization systems 7.4
C3 Sequence diagram for Level of Protection “pxb”
Revised text to use Level of Protection terminology 7.5 X
Group I and Group II purging automated for Level of Protection “pxb”
Revised text to use Level of Protection terminology 7.7 X
Group I and Group II purging automated for Level of Protection “pxb”
Added text specifying that for “pxb”, control must be automated 7.7
C4 Group I or Group II – purging criteria
Revised text to use Level of Protection terminology 7.8 X
Group
III – cleaning
Added text for cleaning enclosures used in explosive dust atmospheres 7.9
X
Safety devices to detect minimum overpressure
Add word “minimum” to clause title to be consistent with text 7.11 X
Type Changes Clause Minor and editorial changes Extension Major technical changes Safety devices to detect minimum overpressure
Revised text to use Level of Protection terminology 7.11 d) X
Value of minimum overpressure
Added word “minimum” to clause title to be consistent with text 7.12 X
Value of minimum overpressure
Revised text to use Level of Protection terminology 7.12 X
Value of minimum overpressure
Added text to reflect a note in Annex C 7.12
X
Pressurizing multiple enclosures
Revised text to use Level of Protection terminology 7.13 X
Safety devices on doors and covers
Revised text to use Level of Protection terminology 7.14 X
Equipment that may remain energized
Revised text to use EPL and level of protection terminology 7.15 X
Equipment permitted within Level of Protection “pyb”
Revised text to use EPL and level of protection terminology 7.16 X
Group I and Group II Filling procedure
Allow filling in a hazardous location if tested as non-hazardous 8.4
X
Group III Filling Procedure
Added static pressurization filling procedure for combustible dust 8.5
X
Safety devices
Revised text to use Level of Protection terminology 8.6
Equipment that may remain energized
Revised text to use EPL terminology 8.7 X
Overpressure
Removed reference to 60079-0 by clause number 8.8 X
Backup supply
Added requirements for a backup supply of protective gas 9.1
C5 Independent supplies
Provided requirements for independence of pressurization 9.2
C6 Release Conditions
Removed reference to 60079-0 by clause number for “X” condition 11.1.2 X
Containment system with a limited release
Removed reference to 60079-0 by clause number for “X” condition 12.3 X
13.3.3
Limited release of a gas or vapour
Revised text to reflect UFL/LFL terms 13.3.3 X
Ignition-capable equipment
Revised text to use Level of Protection terminology 14 X
Type verification and tests
Edition 5 clauses 16.1 to 16.7 moved to Edition 6 clauses 16.2 to 16.8 16 X
- 9 - EN 60079-2:2014
Type Changes Clause Minor and editorial changes Extension Major technical changes Determining the maximum overpressure rating
Added requirements to determine maximum overpressure 16.1
C7 Maximum overpressure test
Moved Maximum overpressure test to 16.2 16.2
C7 Maximum overpressure test
Moved Maximum overpressure test to 16.2 16.3.2
X
Tests for an infallible containment system
Clarify the rating used for the test 16.7.1
C8 Tests for an infallible containment system
Modified test for infallible containment 16.7.2
C9 bdition 5 − serifying ability of the pressurized enclosure to limit internal pressure
Eliminated test 16.8
C7 Functional test
Clarified that applies only to safety devices provided with enclosures 17.1 X
Tests for an infallible containment system
Waived helium leak tests for liquid systems 17.3
X
Supplementary marking
Allowed continued use of type of protection marking 18.3
Pressurization systems
Clarified use of Ex [p] and [Ex p] marking 18.6 X
Warnings required in other clauses
Added table number 18.7 X
Warnings required in other clauses
Added warning from 7.9 18.7
X
Warnings required in other clauses
Added warnings from Annex G and Annex H 18.7
C1 Instructions
Added requirements for Group III 19
X
Edition 5 Annex G –
Infallibility test for containment system
Deleted and replaced Annex G X
Edition 5 Annex H –
Introduction of an alternative risk assessment method encompassing “equipment protection levels”
Deleted and replaced Annex H X
Annex G –
Internal Cells and Batteries for Level of Protection “pxb” and Level of Protection “pyb”
Added requirements for cells and Batteries
X
Annex H –
Internal Cells and Batteries for Level of Protection “pzc”
Added requirements for cells and Batteries
X
...