EN 60079-29-3-2014 en Explosive atmospheres - Part 29-3 Gas detectors - Guidance on functional safety of fixed gas detection systems.pdf

1、BSI Standards PublicationExplosive atmospheresPart 29-3: Gas detectors - Guidance on functional safety of fixed gas detection systemsBS EN 60079-29-3:2014National forewordThis British Standard is the UK implementation of EN60079-29-3:2014. It is identical to IEC 60079-29-3:2014.The UK participation

2、in its preparation was entrusted by Tech-nical Committee EXL/31, Equipment for explosive atmospheres, to Subcommittee EXL/31/3, Codes of practice.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the nece

3、ssary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 76167 6ICS 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 30 June 2014.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 60079-29-3:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60079-29-3 June 2014 ICS 29.260.20 English Version Ex

5、plosive atmospheres - Part 29-3: Gas detectors - Guidance on functional safety of fixed gas detection systems (IEC 60079-29-3:2014) Atmosphres explosives - Partie 29-3: Dtecteurs de gaz - Recommandations relatives la scurit fonctionnelle des systmes fixes de dtection de gaz (CEI 60079-29-3:2014) Exp

6、losionsfhige Atmosphre - Teil 29-3: Gasmessgerte - Leitfaden zur funktionalen Sicherheit von ortsfesten Gaswarnsystemen (IEC 60079-29-3:2014) This European Standard was approved by CENELEC on 2014-05-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate th

7、e 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 Stan

8、dard 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

9、 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, Po

10、land, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marni

11、x 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 60079-29-3:2014 E EN 60079-29-3:2014 - 2 - Foreword The text of document 31/1105A/FDIS, future edition 1 of IEC 60079-29-3, prepared by IEC TC 31, Equipment

12、for explosive atmospheres, was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60079-29-3:2014. 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) 2

13、015-02-01 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2017-05-01 This part of IEC 60079-29 is to be used in conjunction with the following standards: IEC 60079-0, Explosive atmospheres Part 0: Equipment General requirements IEC 60079-29-1, Exp

14、losive atmospheres Part 29-1: Gas detectors Performance requirements of detectors for flammable gases IEC 60079-29-2, Explosive atmospheres Part 29-2: Gas detectors Selection, installation, use and maintenance of detectors for flammable gases and oxygen IEC 60079-29-4, Explosive atmospheres Part 29-

15、4: Gas detectors Performance requirements of open path detectors for flammable gases 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. E

16、ndorsement notice The text of the International Standard IEC 60079-29-3:2014 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 60079-1 NOTE Harmonised as EN 60079-1

17、0-1. IEC 61511-1 NOTE Harmonised as EN 61511-1. IEC 61511-2 NOTE Harmonised as EN 61511-2. IEC 61511-3 NOTE Harmonised as EN 61511-3. - 3 - EN 60079-29-3:2014 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following document

18、s, 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

19、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 60079-29-1 (mod) - Explos

20、ive atmospheres - Part 29-1: Gas detectors - Performance requirements of detectors for flammable gases EN 60079-29-1 - +AA IEC 60079-29-2 2007 Explosive atmospheres - Part 29-2: Gas detectors - Selection, installation, use and maintenance of detectors for flammable gases and oxygen EN 60079-29-2 200

21、7 +EN 60079-29-2:2007/corrigendum Dec. 2007 2007 IEC 60079-29-4 (mod) - Explosive atmospheres - Part 29-4: Gas detectors - Performance requirements of open path detectors for flammable gases EN 60079-29-4 - +AA IEC 61508 series Functional safety of electrical/electronic/programmable electronic safet

22、y-related systems EN 61508 series IEC 60079-29-3 Edition 1.0 2014-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Explosive atmospheres Part 29-3: Gas detectors Guidance on functional safety of fixed gas detection systems Atmosphres explosives Partie 29-3: Dtecteurs de gaz Recommandations relatives l

23、a scurit fonctionnelle des systmes fixes de dtection de gaz INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE X ICS 29.260.20 PRICE CODE CODE PRIX ISBN 978-2-8322-1496-1 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commis

24、sion Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. colourinside 2 IEC 60079-29-3:2014 IEC 2014 CONTENTS FOREWORD . 5 INTRODUCTION . 7 1 Scope 10 2 Normative references 11 3 Terms and definitions 11 4 Requirements 13 4.1 General

25、13 4.2 Demand rate 13 5 Gas detection unique features . 13 5.1 Objective . 13 5.2 Features 14 General 14 5.2.1Sensor location . 14 5.2.2Sensor filter elements (passive) 14 5.2.3Sensor filter elements (active) 14 5.2.4Sensor principles 14 5.2.5Poisoning and adverse chemical reaction . 15 5.2.6ppm.hr

26、or %vol.hr lifetime . 15 5.2.7Negative gas readings 15 5.2.8Hazard and risk analysis . 15 5.2.9Preventative effectiveness or mitigation effectiveness 16 5.2.10Cross sensitivities . 16 5.2.11Special states . 16 5.2.12Metrological performance standards . 16 5.2.13Fault signal handling . 16 5.2.14Over-

27、range indication . 16 5.2.15Surrogate calibration 16 5.2.16Maximum/minimum alarm set points . 17 5.2.176 Functional safety management 17 6.1 Objective . 17 6.2 Requirements 17 6.3 Competence 18 7 General requirements 19 7.1 Objective . 19 7.2 Requirements 19 General 19 7.2.1Safety and non safety fun

28、ctions 19 7.2.2Safety functions of different integrity targets . 19 7.2.3Behaviour under dangerous failure conditions. 19 7.2.4Behaviour under safe failure conditions 20 7.2.5Behaviour under special state conditions 20 7.2.6Power supply 21 7.2.7Gas detector . 21 7.2.8Gas detection control unit (logi

29、c solver) 21 7.2.9Final element (actuator) 22 7.2.10Visual indication . 22 7.2.11BS EN 60079-29-3:2014IEC 60079-29-3:2014 IEC 2014 3 Switching outputs . 22 7.2.12Protocol outputs . 24 7.2.13Protocol inputs 24 7.2.14System architecture, PFD and PFH values . 24 7.2.158 Gas detection unique requirement

30、s . 24 8.1 Objectives 24 8.2 Requirements 25 Introduction to gas sampling . 25 8.2.1Gas sampling 25 8.2.2Gas multiplexer 26 8.2.3Gas multiplexer control system . 27 8.2.4Conditioning of measured gas 27 8.2.5Gas sampling by diffusion mode . 28 8.2.6Automatic calibration and adjustment 28 8.2.7Automat

31、ic calibration and adjustment control system 29 8.2.89 Alternative control units (logic solvers) 30 9.1 Objectives 30 9.2 Requirements 30 Performance (metrological) . 30 9.2.1Programming of logic 30 9.2.210 Factory acceptance testing 30 10.1 Objectives 30 10.2 Requirements 30 Planning . 30 10.2.1Exe

32、cution . 31 10.2.211 Installation and commissioning 31 11.1 Objectives 31 11.2 Requirements 32 Planning . 32 11.2.1Execution . 32 11.2.212 System validation 33 12.1 Objectives 33 12.2 Requirements 33 Planning . 33 12.2.1Execution . 33 12.2.213 Operation and maintenance . 34 13.1 Objectives 34 13.2 R

33、equirements 34 Planning . 34 13.2.1Execution . 34 13.2.214 System modification 35 14.1 Objectives 35 14.2 Requirements 35 Planning . 35 14.2.1Execution . 35 14.2.215 System decommissioning 36 15.1 Objectives 36 15.2 Requirements 36 BS EN 60079-29-3:2014 4 IEC 60079-29-3:2014 IEC 2014 Planning . 36 1

34、5.2.1Execution . 36 15.2.216 Documentation 37 16.1 Objectives 37 16.2 Requirements 37 (informative) Typical Applications 38 Annex AA.1 Typical diffusion applications . 39 A.1.1 Application 1 . 39 A.1.2 Application 2 . 40 A.1.3 Application 3 . 40 A.1.4 Application 4 . 40 A.2 Typical sampling applicat

35、ions . 41 A.2.1 Point to Point sampling . 41 A.2.2 Multi-stream sampling . 42 (informative) Cross references between standards. 43 Annex B(informative) Transformation of requirements . 44 Annex CC.1 General 44 C.2 SIL capability 1 44 C.2.1 Characteristic . 44 C.2.2 Transformation . 44 C.3 SIL capabi

36、lity 2 44 C.3.1 Characteristic . 44 C.3.2 Transformation . 45 C.4 SIL capability 3 45 C.4.1 Characteristic . 45 C.4.2 Transformation . 45 Bibliography 46 Figure 1 Gas Detection System Architecture 8 Figure 2 Related Safety Instrumented System Standards . 10 Figure A.1 Gas detection safety loops 39 F

37、igure A.2 Typical gas detector aspiration configurations . 41 Figure B.1 Cross references between standards 43 Table 1 Typical Job Descriptions and Most Relevant Clauses 9 Table 2 Demand for Functional Safety Management (see IEC 61508-1) . 18 BS EN 60079-29-3:2014IEC 60079-29-3:2014 IEC 2014 5 INTER

38、NATIONAL ELECTROTECHNICAL COMMISSION _ EXPLOSIVE ATMOSPHERES Part 29-3: Gas detectors Guidance on functional safety of fixed gas detection systems FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical

39、committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Tech

40、nical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governme

41、ntal and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or a

42、greements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international u

43、se and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to pro

44、mote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indi

45、cated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6

46、) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property dama

47、ge or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publ

48、ication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all s

49、uch patent rights. International Standard IEC 60079-29-3 has been prepared by IEC technical committee 31: Equipment for explosive atmospheres. This part of IEC 60079-29 is to be used in conjunction with the following standards: IEC 60079-0, Explosive atmospheres Part 0: Equipment General requirements IEC 60079-29-1, Explosive atmospheres Part 29-1: Gas detectors Performance requirements of detectors for flammable gases IEC 60079-29-2, Explo