EN 60079-29-2-2015 en Explosive atmospheres - Part 29-2 Gas detectors - Selection installation use and maintenance of detectors for flammable gases and oxygen.pdf

1、BSI Standards PublicationExplosive atmospheresPart 29-2: Gas detectors Selection, installation, use and maintenance of detectors for flammable gases and oxygenBS EN 60079-29-2:2015National forewordThis British Standard is the UK implementation of EN 60079-29-2:2015. It isidentical to IEC 60079-29-2:

2、2015. It supersedes BS EN 60079-29-2:2007which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee EXL/31, Equipment for explosive atmospheres.A list of organizations represented on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 n

3、ot purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 79818 4ICS 13.320; 29.260.20Compliance with a British Standard cannot confer immunity froml

4、egal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 May 2015.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 60079-29-2:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60079-29-2 M

5、ay 2015 ICS 29.260.20 Supersedes EN 60079-29-2:2007 English Version Explosive atmospheres - Part 29-2: Gas detectors - Selection, installation, use and maintenance of detectors for flammable gases and oxygen (IEC 60079-29-2:2015) Atmosphres explosives - Partie 29-2: Dtecteurs de gaz - Slection, inst

6、allation, utilisation et maintenance des dtecteurs de gaz inflammables et doxygne (IEC 60079-29-2:2015) Explosionsfhige Atmosphre - Teil 29-2: Gasmessgerte - Auswahl, Installation, Einsatz und Wartung von Gerten fr die Messung von brennbaren Gasen und Sauerstoff (IEC 60079-29-2:2015) This European S

7、tandard was approved by CENELEC on 2015-04-20. 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 conc

8、erning 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 m

9、ember 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 Repu

10、blic 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 Standardizati

11、on Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 60079-29-2:201

12、5 E BS EN 60079-29-2:2015EN 60079-29-2:2015 - 2 - Foreword The text of document 31/1169/FDIS, future edition 2 of IEC 60079-29-2, prepared by IEC TC 31, Equipment for explosive atmospheres, was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60079-29-2:2015. The following da

13、tes 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) 2016-01-20 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2018-04-20 This document s

14、upersedes EN 60079-29-2:2007. 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. Endorsement notice The text of the International Standar

15、d IEC 60079-29-2:2015 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 60079-14 NOTE Harmonized as EN 60079-14. IEC 60079-20-1 NOTE Harmonized as EN 60079-20-1. IE

16、C 61326-1 NOTE Harmonized as EN 61326-1. IEC 60079-29-3 NOTE Harmonized as EN 60079-29-3. BS EN 60079-29-2:2015- 3 - EN 60079-29-2:2015 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part,

17、 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 mo

18、dified 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 60079-0 - Explosive atmospheres - Part 0: Equip

19、ment - General requirements EN 60079-0 - - - +A11 - IEC 60079-10-1 2008 Explosive atmospheres - Part 10-1: Classification of areas - Explosive gas atmospheres EN 60079-10-1 2009 IEC 60079-10-2 - Explosive atmospheres - Part 10-2: Classification of areas - Combustible dust atmospheres EN 60079-10-2 -

20、 IEC 60079-13 - Explosive atmospheres - Part 13: Equipment protection by pressurized room “p“ EN 60079-13 - IEC 60079-17 - Explosive atmospheres - Part 17: Electrical installations inspection and maintenance EN 60079-17 - IEC 60079-19 - Explosive atmospheres - Part 19: Equipment repair, overhaul and

21、 reclamation EN 60079-19 - IEC 60079-29-1 (mod) 2007 Explosive atmospheres - Part 29-1: Gas detectors - Performance requirements of detectors for flammable gases EN 60079-29-1 2007 IEC 60079-29-4 - Explosive atmospheres - Part 29-4: Gas detectors - Performance requirements of open path detectors for

22、 flammable gases EN 60079-29-4 - IEC 61285 - Industrial-process control - Safety of analyzer houses EN 61285 - BS EN 60079-29-2:2015 2 IEC 60079-29-2:2015 IEC 2015 CONTENTS FOREWORD . 8 INTRODUCTION . 11 1 Scope 13 2 Normative references 14 3 Terms and definitions 14 3.1 Gas properties and other phy

23、sics 14 3.2 Types of equipment 16 3.3 Sensors and detectors 18 3.4 Supply of gas to instruments . 19 3.5 Signals and alarms . 19 3.6 Times, checks and equipment behaviour . 20 3.7 Terms exclusive to open path equipment 21 4 Basic information on the properties, behaviour, gases and vapours, and speci

24、fic applications of gas detection . 23 4.1 Detecting gases and vapours 23 4.1.1 General . 23 4.1.2 Safety when monitoring for flammable gases where personnel could be present 24 4.2 Some common properties of gases and vapours . 25 4.3 The differences between detecting gases and vapours . 26 4.3.1 Ge

25、neral . 26 4.3.2 Detection of gases . 26 4.3.3 Detection of vapours 28 4.4 Oxygen deficiency. 31 4.4.1 General . 31 4.4.2 Chemical reaction of oxygen, with solid products . 31 4.4.3 Chemical reaction of oxygen, with gaseous products . 31 4.4.4 Dilution of the air by displacement by some other gas or

26、 vapour 32 4.5 Specific applications of gas detection . 32 4.5.1 Gas detection as means of reducing risk of explosion 32 4.5.2 Gas free work permit . 35 4.5.3 Monitoring of air inlets . 36 4.6 Specific considerations for open path detection 36 5 Measuring principles 37 5.1 General . 37 5.2 Catalytic

27、 sensors 39 5.2.1 General . 39 5.2.2 Common applications 39 5.2.3 Limitations . 39 5.2.4 Interferences . 40 5.2.5 Poisoning 40 5.3 Thermal conductivity sensors 41 5.3.1 General . 41 5.3.2 Common applications 41 5.3.3 Limitations . 41 5.3.4 Interferences . 41 BS EN 60079-29-2:2015IEC 60079-29-2:2015

28、IEC 2015 3 5.3.5 Poisoning 41 5.4 Infrared sensors 41 5.4.1 General . 41 5.4.2 Common applications 42 5.4.3 Limitations . 42 5.4.4 Interferences . 42 5.4.5 Poisoning 42 5.5 Semiconductor sensors . 43 5.5.1 General . 43 5.5.2 Common applications 43 5.5.3 Limitations . 43 5.5.4 Interferences . 43 5.5.

29、5 Poisoning 43 5.6 Electrochemical sensors . 44 5.6.1 General . 44 5.6.2 Common applications 44 5.6.3 Limitations . 44 5.6.4 Interferences . 44 5.6.5 Poisoning 44 5.7 Flame ionization detectors (FID) . 45 5.7.1 General . 45 5.7.2 Common applications 45 5.7.3 Limitations . 45 5.7.4 Interferences . 45

30、 5.7.5 Poisoning 45 5.8 Flame temperature analysers (FTA) 45 5.8.1 General . 45 5.8.2 Common applications 45 5.8.3 Limitations . 46 5.8.4 Interferences . 46 5.8.5 Poisoning 46 5.9 Photo ionisation detector (PID) . 46 5.9.1 General . 46 5.9.2 Common applications 46 5.9.3 Limitations . 46 5.9.4 Interf

31、erences . 46 5.9.5 Poisoning 47 5.10 Paramagnetic oxygen detector 47 5.10.1 General . 47 5.10.2 Common applications 47 5.10.3 Limitations . 47 5.10.4 Interference . 47 5.10.5 Poisoning 47 6 Selection of equipment 47 6.1 General . 47 6.2 Selection criteria . 48 6.2.1 General criteria 48 6.2.2 Gases t

32、o be detected by the equipment . 49 6.2.3 Application of fixed equipment . 50 BS EN 60079-29-2:2015 4 IEC 60079-29-2:2015 IEC 2015 6.2.4 Application of transportable and portable equipment 54 6.3 Miscellaneous factors affecting selection of equipment . 55 6.3.1 Electromagnetic immunity 55 6.3.2 Inte

33、nded Zone(s) of use . 55 7 Behaviour of gas releases . 55 7.1 Nature of a release . 55 7.1.1 General . 55 7.1.2 Release rate of gas or vapour 55 7.1.3 Flammable limits 56 7.1.4 Ventilation . 56 7.1.5 Relative density of the released gas or vapour. 56 7.1.6 Temperature and/or pressure. 57 7.1.7 Other

34、 parameters to be considered 57 7.1.8 Outdoor sites and open structures . 57 7.2 Buildings and enclosures 57 7.2.1 General . 57 7.2.2 Unventilated buildings and enclosures . 57 7.2.3 Ventilated buildings and enclosures . 58 7.3 Environmental considerations . 59 8 Design and installation of fixed gas

35、 detection systems . 59 8.1 General . 59 8.2 Basic considerations for the installation of fixed systems 59 8.2.1 General . 59 8.2.2 Point detection equipment and remote sensors 60 8.2.3 Systems consisting of sampling equipment 60 8.2.4 Open path (line of sight) equipment . 61 8.3 Location of detecti

36、on points 61 8.3.1 General . 61 8.3.2 General site considerations . 61 8.3.3 Environmental conditions . 62 8.4 Access for calibration and maintenance 65 8.5 Additional considerations for sample lines . 65 8.6 Additional considerations for open path equipment . 66 8.7 Summary of considerations for th

37、e location of measuring points and open paths 66 8.8 Installation of measuring point and open path equipment 67 8.9 Integrity and safety of fixed systems . 67 8.9.1 General . 67 8.9.2 Redundancy in fixed systems. 68 8.9.3 Protection against loss of main power supply . 68 8.10 Timing of installation

38、during construction operations . 68 8.11 Commissioning . 68 8.11.1 Inspection 68 8.11.2 Initial gas calibration 69 8.11.3 Adjustment of alarm set points . 69 8.12 Operating instructions, plans and records . 70 9 Use of portable and transportable flammable gas detection equipment 70 9.1 General . 70

39、BS EN 60079-29-2:2015IEC 60079-29-2:2015 IEC 2015 5 9.2 Initial and periodic check procedures for portable and transportable instrumentation . 71 9.2.1 General . 71 9.2.2 Inspection and functional checks . 72 9.2.3 Routine tests and recalibration 73 9.2.4 Maintenance and recalibration . 73 9.3 Guida

40、nce on the use of portable and transportable equipment 74 9.3.1 Electrical safety in hazardous atmospheres . 74 9.3.2 Safety of personnel 74 9.3.3 Spot tests and sampling 75 9.3.4 Sampling above liquids 75 9.3.5 Avoidance of condensation 75 9.3.6 Poisoning of sensors . 75 9.3.7 Changes of temperatur

41、e 76 9.3.8 Accidental damage 76 9.3.9 Minimalist operation, the “Read and run” concept 76 10 Training of operational personnel 76 10.1 General . 76 10.2 General training Basic limitations and safety 77 10.3 Operator training . 77 10.4 Maintenance training . 78 11 Maintenance, routine procedures and

42、general administrative control . 78 11.1 General . 78 11.2 Operational checks . 80 11.2.1 General . 80 11.2.2 Fixed systems . 80 11.2.3 Portable and transportable gas detection equipment 81 11.3 Maintenance . 81 11.3.1 General . 81 11.3.2 Fixed equipment 81 11.3.3 Portable and transportable gas dete

43、ction equipment 82 11.3.4 Off-site maintenance, general 82 11.3.5 Maintenance procedures 82 11.4 Sensors 82 11.4.1 General . 82 11.4.2 Flame arrestor . 83 11.5 Flow systems 83 11.5.1 General . 83 11.5.2 Inspection 83 11.5.3 Filters, traps and flame arrestors . 83 11.5.4 Flow system and sample chambe

44、r . 83 11.5.5 Flow connections . 83 11.5.6 Moving parts 83 11.5.7 Automatic sample-draw systems 83 11.5.8 Loss-of-flow signals . 83 11.6 Readout devices . 83 11.6.1 General . 83 11.6.2 Other readouts 84 11.7 Alarms 84 BS EN 60079-29-2:2015 6 IEC 60079-29-2:2015 IEC 2015 11.8 Calibration 84 11.8.1 Ca

45、libration kits and test equipment 84 11.8.2 Calibration procedure 85 (normative) Measuring principles . 87 Annex AA.1 General . 87 A.2 Catalytic sensors 89 A.2.1 General . 89 A.2.2 Common applications 90 A.2.3 Limitations . 90 A.2.4 Interferences . 90 A.2.5 Poisoning 91 A.3 Thermal conductivity sens

46、ors 92 A.3.1 General . 92 A.3.2 Common applications 92 A.3.3 Limitations . 93 A.3.4 Interferences . 93 A.3.5 Poisoning 93 A.4 Infrared sensors 93 A.4.1 General . 93 A.4.2 Common applications 95 A.4.3 Limitations . 96 A.4.4 Interferences . 96 A.4.5 Poisoning 97 A.5 Semi-conductor sensors 97 A.5.1 Gen

47、eral . 97 A.5.2 Common applications 97 A.5.3 Limitations . 97 A.5.4 Interferences . 98 A.5.5 Poisoning 98 A.6 Electrochemical sensors . 98 A.6.1 General . 98 A.6.2 Common applications 99 A.6.3 Limitations . 99 A.6.4 Interferences . 100 A.6.5 Poisoning 100 A.7 Flame ionization detectors (FID) . 101 A

48、.7.1 General . 101 A.7.2 Common applications 102 A.7.3 Limitations . 102 A.7.4 Interferences . 102 A.7.5 Poisoning 102 A.8 Flame temperature analysers (FTA) 103 A.8.1 General . 103 A.8.2 Common applications 103 A.8.3 Limitations . 103 A.8.4 Interferences . 103 A.8.5 Poisoning 103 A.9 Photo ionisatio

49、n detector (PID) . 104 A.9.1 General . 104 BS EN 60079-29-2:2015IEC 60079-29-2:2015 IEC 2015 7 A.9.2 Common applications 104 A.9.3 Limitations . 105 A.9.4 Interferences . 105 A.9.5 Poisoning 105 A.10 Paramagnetic oxygen detector 105 A.10.1 General . 105 A.10.2 Common applications 106 A.10.3 Limitations . 106 A.10.4 Interference . 106 A.10.5 Poisoning 106 (informative) Environmental parameters . 107 Annex B(informative) Typical environmental and application check-list for flammable Annex Cgas de