1、 IEC 61285 Edition 3.0 2015-02 INTERNATIONAL STANDARD NORME INTERNATIONALE Industrial-process control Safety of analyser houses Commande des processus industriels Scurit des btiments pour analyseurs IEC 61285:2015-02(en-fr) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2015 IEC, Geneva, Switzerl
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19、avez des questions contactez-nous: csciec.ch. IEC 61285 Edition 3.0 2015-02 INTERNATIONAL STANDARD NORME INTERNATIONALE Industrial-process control Safety of analyser houses Commande des processus industriels Scurit des btiments pour analyseurs INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELE
20、CTROTECHNIQUE INTERNATIONALE ICS 13.110; 25.040.40 ISBN 978-2-8322-2228-7 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attentio
21、n! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 IEC 61285:2015 IEC 2015 CONTENTS FOREWORD . 4 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
22、 4.2 Response time 11 4.3 Utilities . 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
23、 requirements . 12 5.4.1 Construction 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 Ve
24、ntilation . 14 5.5.7 Temperature 15 5.6 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
25、 by means of artificial ventilation . 16 6.3.1 Classification . 16 6.3.2 Requirements for AHs where the explosion hazard originates externally 17 IEC 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 wh
26、ere the explosion hazard 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
27、19 6.4.3 Heating requirements 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 L
28、abelling/instructions/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 evalu
29、ation 25 4 IEC 61285:2015 IEC 2015 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ INDUSTRIAL-PROCESS CONTROL SAFETY OF ANALYSER HOUSES FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC
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40、hts. International Standard IEC 61285 has been prepared by subcommittee 65B: Measurement and control devices, of IEC technical committee 65: Industrial-process measurement, control and automation. This third edition cancels and replaces the second edition published in 2004. This edition constitutes
41、a technical revision. The main changes with respect to the previous edition are listed below: a) incorporation of previously issued corrigendum; b) minor updates to several sections and references. IEC 61285:2015 IEC 2015 5 The text of this standard is based on the following documents: FDIS RVD 65B/
42、954/FDIS 65B/966/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The committee has decided that the contents of this publicatio
43、n will remain unchanged until the stability date indicated on the IEC website under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. 6 IEC 61285:2015 IEC 2015 INTRODUCTION
44、 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 process analysis in analyser houses is beneficia
45、l 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 requirements for typical analyser houses (AHs
46、). It is superseded in all cases by national, local, or corporate requirements, if other or more stringent requirements will apply. IEC 61285:2015 IEC 2015 7 INDUSTRIAL-PROCESS CONTROL SAFETY OF ANALYSER HOUSES 1 Scope This International Standard describes the physical requirements for the safe oper
47、ation 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 explosive atmospheres and it applies to hazards caused by to
48、xic 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 issues related to analyser houses. Clause 4 addresses the lo
49、cation 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 conditioning 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 o
