1、BSI Standards PublicationExplosive atmospheresPart 2: Equipment protection by pressurized enclosure “p”BS EN 60079-2:2014National forewordThis British Standard is the UK implementation of EN 60079-2:2014. It is identical to IEC 60079-2:2014. It supersedes BS EN 60079-2:2007 andBS EN 61241-4:2006 whi
2、ch are withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee EXL/31, Equipment for explosive atmospheres.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary pro
3、visions ofa contract. Users are responsible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 78350 0ICS 13.230; 29.260.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was
4、published under the authority of theStandards Policy and Strategy Committee on 31 January 2015.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 60079-2:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60079-2 December 2014 ICS 29.260.20 Supersedes EN 6007
5、9-2:2007, EN 61241-4:2006 English Version Explosive atmospheres - Part 2: Equipment protection by pressurized enclosure “p“ (IEC 60079-2:2014) Atmosphres explosives - Partie 2: Protection du matriel par enveloppe surpression interne “p“ (IEC 60079-2:2014) Explosionsgefhrdete Bereiche - Teil 2: Gerte
6、schutz durch berdruckkapselung “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
7、 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
8、 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
9、, 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
10、United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CENELEC All rights of exploitation in any form and by any mea
11、ns reserved worldwide for CENELEC Members. Ref. No. EN 60079-2:2014 E BS EN 60079-2:2014EN 60079-2:2014 - 2 - Foreword The text of document 31/1119/FDIS, future edition 6 of IEC 60079-2, prepared by IEC/TC 31 “Equipment for explosive atmospheres“ was submitted to the IEC-CENELEC parallel vote and ap
12、proved by CENELEC as EN 60079-2:2014. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2015-06-19 latest date by which the national standards conflicting with the document
13、 have to be withdrawn (dow) 2017-08-25 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
14、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
15、 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
16、 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
17、 as EN 60079-1. IEC 60079-5 NOTE Harmonized as EN 60079-5. IEC 60079-6 NOTE Harmonized as EN 60079-6. BS EN 60079-2:2014- 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 Harmo
18、nized 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. BS EN 60079-2:2014EN 60079-2:2014 - 4 - Annex ZA (normative) Normative references to international publications with their corresponding Eur
19、opean 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 amendment
20、s) 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 Titl
21、e 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:
22、 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 determinat
23、ion 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
24、 - Part 1: Principles, requirements and tests EN 60664-1 - BS EN 60079-2:2014- 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 Tra
25、de 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); E
26、R 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 requir
27、ements of the Directives concerned. WARNING: Other requirements and other EU Directives may be applicable to the products falling within the scope of this standard. BS EN 60079-2:2014EN 60079-2:2014 - 6 - Annex ZY (informative) Significant changes between this European Standard and EN 60079-2:2007 T
28、his 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 “apparatu
29、s” 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
30、 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 Determinati
31、on 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
32、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 BS EN 60079-2:2014- 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 Adde
33、d 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 barri
34、ers 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 ha
35、zardous 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 s
36、afety 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 Gro
37、up 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
38、 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 BS EN 60079-2:2014EN 60079-2:20
39、14 - 8 - 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
40、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
41、 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 Fill
42、ing 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
43、 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
44、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
45、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 BS EN 60079-2:2014- 9 - EN 60079-2:2014 Type Changes Clause Minor and editorial changes Extension Major technical changes Determining the maximum overpress
46、ure 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
47、 16.7.1 C8 Tests for an infallible containment system Modified test for infallible containment 16.7.2 C9 Edition 5 Verifying 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
48、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 numb
49、er 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
