1、 IEC 60079-10-1 Edition 2.0 2015-09 INTERNATIONAL STANDARD Explosive atmospheres Part 10-1:Classification of areas Explosive gas atmospheres IEC 60079-10-1:2015-09(en)colourinside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2015 IEC,Geneva,Switzerland All rights reserved.Unless otherwise speci
2、fied,no part of this publication may be reproduced or utilized in any form or by any means,electronic or mechanical,including photocopying and microfilm,without permission in writing from either IEC or IECs member National Committee in the country of the requester.If you have any questions about IEC
3、 copyright or have an enquiry about obtaining additional rights to this publication,please contact the address below or your local IEC member National Committee for further information.IEC Central Office Tel.:+41 22 919 02 11 3,rue de Varemb Fax:+41 22 919 03 00 CH-1211 Geneva 20 infoiec.ch Switzerl
4、and www.iec.ch About the IEC The International Electrotechnical Commission(IEC)is the leading global organization that prepares and publishes International Standards for all electrical,electronic and related technologies.About IEC publications The technical content of IEC publications is kept under
5、constant review by the IEC.Please make sure that you have the latest edition,a corrigenda or an amendment might have been published.IEC Catalogue-webstore.iec.ch/catalogue The stand-alone application for consulting the entire bibliographical information on IEC International Standards,Technical Speci
6、fications,Technical Reports and other documents.Available for PC,Mac OS,Android Tablets and iPad.IEC publications search-www.iec.ch/searchpub The advanced search enables to find IEC publications by a variety of criteria(reference number,text,technical committee,).It also gives information on project
7、s,replaced and withdrawn publications.IEC Just Published-webstore.iec.ch/justpublished Stay up to date on all new IEC publications.Just Published details all new publications released.Available online and also once a month by email.Electropedia-www.electropedia.org The worlds leading online dictiona
8、ry of electronic and electrical terms containing more than 30 000 terms and definitions in English and French,with equivalent terms in 15 additional languages.Also known as the International Electrotechnical Vocabulary(IEV)online.IEC Glossary-std.iec.ch/glossary More than 60 000 electrotechnical ter
9、minology entries in English and French extracted from the Terms and Definitions clause of IEC publications issued since 2002.Some entries have been collected from earlier publications of IEC TC 37,77,86 and CISPR.IEC Customer Service Centre-webstore.iec.ch/csc If you wish to give us your feedback on
10、 this publication or need further assistance,please contact the Customer Service Centre:csciec.ch.IEC 60079-10-1 Edition 2.0 2015-09 INTERNATIONAL STANDARD Explosive atmospheres Part 10-1:Classification of areas Explosive gas atmospheres INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 29.260.20 ISBN 9
11、78-2-8322-2867-8 Registered trademark of the International Electrotechnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.colourinside 2 IEC 60079-10-1:2015 IEC 2015 CONTENTS FOREWORD.6 INTRODUCTION.9 1 Scope.10 2 Normative references.10 3 Terms and d
12、efinitions.11 4 General.15 4.1 Safety principles.15 4.2 Area classification objectives.16 4.3 Explosion risk assessment.16 4.4 Competence of Personnel.17 5 Area classification methodology.17 5.1 General.17 5.2 Classification by sources of release method.18 5.3 Use of industry codes and national stan
13、dards.18 5.4 Simplified methods.18 5.5 Combination of methods.19 6 Release of flammable substance.19 6.1 General.19 6.2 Sources of release.19 6.3 Forms of release.20 6.3.1 General.20 6.3.2 Gaseous release.21 6.3.3 Liquefied under pressure.21 6.3.4 Liquefied by refrigeration.22 6.3.5 Aerosols.22 6.3.
14、6 Vapours.22 6.3.7 Liquid releases.22 6.4 Ventilation(or air movement)and dilution.23 6.5 Main types of ventilation.23 6.5.1 General.23 6.5.2 Natural ventilation.23 6.5.3 Artificial ventilation.24 6.5.4 Degree of dilution.25 7 Type of zone.26 7.1 General.26 7.2 Influence of grade of the source of re
15、lease.26 7.3 Influence of dilution.27 7.4 Influence of availability of ventilation.27 8 Extent of zone.27 9 Documentation.28 9.1 General.28 9.2 Drawings,data sheets and tables.28 Annex A(informative)Suggested presentation of hazardous areas.30 A.1 Hazardous area zones Preferred symbols.30 A.2 Hazard
16、ous area suggested shapes.33 IEC 60079-10-1:2015 IEC 2015 3 Annex B(informative)Estimation of sources of release.35 B.1 Symbols.35 B.2 Examples of grade of release.35 B.2.1 General.35 B.2.2 Sources giving a continuous grade of release.35 B.2.3 Sources giving a primary grade of release.36 B.2.4 Sources giving a secondary grade of release.36 B.3 Assessment of grades of release.36 B.4 Summation of releases.37 B.5 Hole size and source radius.38 B.6 Forms of release.40 B.7 Release rate.41 B.7.1 Gener
