1、BSI Standards PublicationIndustrial-process control Safety of analyzer housesBS EN 61285:2015National forewordThis British Standard is the UK implementation of EN 61285:2015. It is identical to IEC 61285:2015. It supersedes BS EN 61285:2004, which will bewithdrawn on 30 March 2018.The UK participati
2、on in its preparation was entrusted by TechnicalCommittee GEL/65, Measurement and control, to Subcommittee GEL/65/2,Elements of systems.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 prov
3、isions ofa contract. Users are responsible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 80698 8ICS 13.110; 25.040.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was p
4、ublished under the authority of theStandards Policy and Strategy Committee on 30 April 2015.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 61285:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61285 April 2015 ICS 13.110; 25.040.40 Supersedes EN 61285:
5、2004 English Version Industrial-process control - Safety of analyzer houses (IEC 61285:2015) Commande des processus industriels - Scurit des btiments pour analyseurs (IEC 61285:2015) Prozessautomatisierung - Sicherheit von Analysengerterumen (IEC 61285:2015) This European Standard was approved by CE
6、NELEC on 2015-03-31. 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 stand
7、ards 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 languag
8、e 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,
9、 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 Comit Europen de Normal
10、isation 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 61285:2015 E BS EN 61285:2015EN 61285:20
11、15 - 2 - Foreword The text of document 65B/954/FDIS, future edition 3 of IEC 61285, prepared by SC 65B “Measurement and control devices“, of IEC/TC 65 “Industrial-process measurement, control and automation“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 61285:2015. The
12、 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) 2015-12-31 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2018-03-31 Th
13、is document supersedes EN 61285:2004. 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
14、 Standard IEC 61285:2015 was approved by CENELEC as a European Standard without any modification. BS EN 61285:2015- 3 - EN 61285:2015 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, a
15、re 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 modi
16、fied 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 (mod) 2011 Explosive atmospheres - Part 0
17、: Equipment - General requirements EN 60079-0 2012 - - +A11 2013 IEC 60079-10-1 2008 Explosive atmospheres - Part 10-1: Classification of areas - Explosive gas atmospheres EN 60079-10-1 2009 IEC 60079-20-1 2010 Explosive atmospheres - Part 20-1: Material characteristics for gas and vapour classifica
18、tion - Test methods and data EN 60079-20-1 2010 BS EN 61285:2015 2 IEC 61285:2015 IEC 2015 CONTENTS INTRODUCTION . 6 1 Scope 7 2 Normative references 7 3 Terms and definitions 8 4 Location of AHs and connection within the process plant areas . 11 4.1 General . 11 4.2 Response time 11 4.3 Utilities .
19、 11 4.4 Safety . 11 4.4.1 Location 11 4.4.2 Escape 11 4.4.3 Area classification . 11 4.4.4 Peripheral hazards 11 4.5 Access 11 5 Design, construction and layout of AHs . 12 5.1 General . 12 5.2 General requirements . 12 5.3 Dimensions and layout 12 5.4 Structural requirements . 12 5.4.1 Construction
20、 materials . 12 5.4.2 Walls . 13 5.4.3 Floors and foundation 13 5.4.4 Doors 13 5.4.5 Windows 13 5.4.6 Roof 13 5.5 Equipment 13 5.5.1 Lighting . 13 5.5.2 Communications 13 5.5.3 Piping, tubing and valves . 13 5.5.4 Utilities 14 5.5.5 Fire extinguishers 14 5.5.6 Ventilation . 14 5.5.7 Temperature 15 5
21、.6 Labelling/instructions/documentation 15 5.6.1 Entrance 15 5.6.2 Alarms . 15 5.6.3 Safety procedures . 15 5.6.4 Additional data. 16 6 Explosion protection of AHs . 16 6.1 General . 16 6.2 General requirements . 16 6.3 Protection of AHs against explosion hazards by means of artificial ventilation .
22、 16 6.3.1 Classification . 16 6.3.2 Requirements for AHs where the explosion hazard originates externally 17 BS EN 61285:2015IEC 61285:2015 IEC 2015 3 6.3.3 Requirements for AHs where the explosion hazard originates from internal gases or vapours 17 6.3.4 Requirements for AHs where the explosion haz
23、ard originates from internal liquids . 18 6.3.5 Requirements for AHs where the explosion hazard originates from any combination of the above . 19 6.4 Protection of AHs against explosion hazards by means of natural ventilation 19 6.4.1 General . 19 6.4.2 Ventilation requirements 19 6.4.3 Heating requ
24、irements 20 6.4.4 Gas detectors 20 7 Measures to prevent health hazards to personnel in AHs . 20 7.1 General . 20 7.2 Guidelines 20 7.3 General requirements . 20 7.4 Safety measures . 21 7.5 External hazards . 22 7.6 Additional measures for abnormal working conditions . 22 7.7 Labelling/instructions
25、/documentation 23 Annex A (normative) Leakage risk of modules in the AH 24 A.1 General . 24 A.2 Modules with negligible leakage risk . 24 A.3 Modules with limited leakage risk 24 A.3.1 General . 24 A.3.2 Guidance for evaluating modules . 25 Bibliography 26 Table A.1 Module evaluation 25 BS EN 61285:
26、2015 6 IEC 61285:2015 IEC 2015 INTRODUCTION Process analysers measure the characteristics of a process stream continuously and automatically. The process sample is introduced automatically and the system is designed for unattended operation and minimal maintenance. The placement of devices for proce
27、ss analysis in analyser houses is beneficial for technical and economic reasons: in order to facilitate appropriate environmental conditions; to simplify servicing and maintenance issues; to enable the use of a common infrastructure (see 3.5). This document is designed to set forth minimum safety re
28、quirements for typical analyser houses (AHs). It is superseded in all cases by national, local, or corporate requirements, if other or more stringent requirements will apply. BS EN 61285:2015IEC 61285:2015 IEC 2015 7 INDUSTRIAL-PROCESS CONTROL SAFETY OF ANALYSER HOUSES 1 Scope This International Sta
29、ndard describes the physical requirements for the safe operation of the process analyser measuring system installed in an analyser house (AH) in order to ensure its protection against fire, explosion and health hazards. This standard applies for analyser houses with inner and/or external potential e
30、xplosive atmospheres and it applies to hazards caused by toxic substances or asphyxiant gases. (Refer to national guidelines on toxic hazards.) This standard does not address facilities where solids (dust, powder, fibres) are the hazard. This standard does not seek to address all functional safety i
31、ssues related to analyser houses. Clause 4 addresses the location of the AH and connection within the process plant areas. Clause 5 addresses the design, construction and layout of the AH. It does not address parts of the analyser measuring system installed in other locations such as sample conditio
32、ning rooms (SCR) or switchgear rooms. Clause 6 addresses measures for reducing the danger of explosion for AHs while permitting maintenance of equipment with the power on and the case open. For most fluids, the major constraint is that the concentration of vapours, which are toxic for personnel, is
33、lower than the lower explosive (flammable) limit (LEL) (see Clause 7). Using n-Pentane as an example, the LEL is 1,4 % or 14 000 null 106, the level immediately dangerous to life or health (which is the maximum level from which a worker could escape within 30 min without any escape-impairing symptom
34、s or any irreversible health effects) is only 0,5 % or 5 000 null 106. Clause 7 addresses those measures for protecting personnel from materials in the atmosphere of AHs that are hazardous to health. 2 Normative references The following documents, in whole or in part, are normatively referenced in t
35、his 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. IEC 60079-0:2011, Explosive atmospheres Part 0: General requirements IEC 60079-10-1:
36、2008, Explosive atmospheres Part 10-1: Classification of areas Explosive gas atmospheres IEC 60079-20-1:2010, Explosive atmospheres Part 20-1: Material characteristics for gas and vapour classification Test methods and data BS EN 61285:2015 8 IEC 61285:2015 IEC 2015 3 Terms and definitions For the p
37、urposes of this document, the following terms and definitions apply. 3.1 analyser cabinet small housing in which analysers are installed individually or grouped together Note 1 to entry: Maintenance is performed from outside the cabinet with the door(s) open. 3.2 analyser shelter structure with one
38、or more sides open and free from obstruction to the natural passage of air, in which one or more analysers are installed Note 1 to entry: The maintenance of the analysers is normally performed in the protection of the shelter. 3.3 analyser house AH enclosed building or part of a building containing
39、process analysers and associated equipment where streams for analysis are brought in and which is regularly entered by authorized personnel Note 1 to entry: An AH is not a permanent workplace. Within the scope of this standard, the term AH is used regardless of the structure configuration as either
40、a room, a walk-in cabinet, an analyser container or an analyser building and whether or not it is an integral part of, or attached to, another structure. 3.4 sample conditioning room SCR room that is separated from the AH and has modules for sample conditioning, auxiliary material, or sample disposa
41、l equipment 3.5 infrastructure required means and supply with auxiliaries to operate an AH with all equipment therein, for example, instrument air, nitrogen, water, power supply, incidental disposal of waste and disposal of substances introduced to be analysed Note 1 to entry: The infrastructure occ
42、asionally comprises the fundament of an AH, the positioning of gas bottles and containers for gas supply and test gases. The infrastructure comprises in addition the ventilation and climatisation of the AH and the needed alarm devices within and outside of the AH. 3.6 maintenance servicing, inspecti
43、on, repair, improvement and weakness analysis of process analyser devices and infrastructure 3.7 toxic substances gaseous or liquid substances that, if released in a room, will cause a health hazard by contact with the skin or by inhalation from the surrounding atmosphere 3.8 safety back-up addition
44、al personnel, in constant contact with a person or persons in hazardous working condition, who could assist or call for additional help BS EN 61285:2015IEC 61285:2015 IEC 2015 9 3.9 external explosion hazard hazard existing when the AH is erected at a location where flammable substances may ingress
45、from the outside resulting in dangerous concentrations of flammable gases and vapours inside the AH 3.10 internal explosion hazard hazard existing when a flammable mixture can result from release of samples or auxiliary supplies inside the AH 3.11 lower explosive limit LEL volume ratio of the flamma
46、ble gas or vapour in air below which an explosive gas atmosphere will not be formed 3.12 explosive gas atmosphere mixture with air, under atmospheric conditions, of a flammable material in the form of gas or vapour in which, after ignition, combustion spreads through the unconsumed mixture 3.13 haza
47、rdous area area in which an explosive gas atmosphere is present, or may be expected to be present, in quantities such as to require special precautions for the construction, installation and use of devices 3.14 non-hazardous area area in which an explosive gas atmosphere is not expected to be presen
48、t in quantities such as to require special precautions for the construction, installation and use of the analysers 3.15 zone 0 area in which an explosive gas atmosphere is present continuously or for long periods or frequently SOURCE: IEC 60079-10-1:2008, 3.6 3.16 zone 1 area in which an explosive g
49、as atmosphere is likely to occur in normal operation occasionally SOURCE: IEC 60079-10-1:2008, 3.7 3.17 zone 2 area in which an explosive gas atmosphere is not likely to occur in normal operation but, if it does occur, will persist for a short period only SOURCE: IEC 60079-10-1:2008, 3.8 BS EN 61285:2015 10 IEC 61285:2015 IEC 2015 3.18 source of release a point or location from which a gas, vapour, mist or liquid may be released into the atmosphere so that an explosive gas atmosphere cou
