1、 IEC 60079-10-2 Edition 2.0 2015-01 INTERNATIONAL STANDARD NORME INTERNATIONALE Explosive atmospheres Part 10-2: Classification of areas Explosive dust atmospheres Atmosphres explosives Partie 10-2: Classement des emplacements Atmosphres explosives poussireuses IEC 60079-10-2:2015-01(en-fr) THIS PUB
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19、sirez nous donner des commentaires sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 60079-10-2 Edition 2.0 2015-01 INTERNATIONAL STANDARD NORME INTERNATIONALE Explosive atmospheres Part 10-2: Classification of areas Explosive dust atmospheres Atmosphres explosives P
20、artie 10-2: Classement des emplacements Atmosphres explosives poussireuses INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE ICS 29.260.20 ISBN 978-2-8322-2195-2 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Ele
21、ctrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 IEC 60079-10-2:2015 IEC 2015 CONTENTS FOREWORD . 4 INTRODUCTION . 7 1 Scope 8 2 Normat
22、ive references 9 3 Terms and definitions 9 4 Area classification . 12 4.1 General . 12 4.2 Area classification procedure for explosive dust atmospheres . 13 4.3 Competence of personnel . 14 5 Sources of release. 14 5.1 General . 14 5.2 Dust containment 14 5.3 Identification and grading of sources of
23、 release 14 6 Zones 15 6.1 General . 15 6.2 Extent of zones . 15 6.2.1 General . 15 6.2.2 Zone 20 . 15 6.2.3 Zone 21 . 16 6.2.4 Zone 22 . 16 7 Dust layers 16 8 Documentation 17 8.1 General . 17 8.2 Drawings, data sheets and tables . 17 8.2.1 Content of documents 17 8.2.2 Preferred Symbol key for are
24、a classification zones 18 Annex A (informative) Area classification examples . 19 A.1 Examples of zones 19 A.1.1 General . 19 A.1.2 Zone 20 . 19 A.1.3 Zone 21 . 19 A.1.4 Zone 22 . 19 A.2 Bag emptying station within a building and without exhaust ventilation 20 A.3 Bag emptying station with exhaust v
25、entilation . 21 A.4 Cyclone and filter with clean outlet outside building 21 A.5 Drum tipper within a building without exhaust ventilation . 22 Annex B (informative) Housekeeping . 24 B.1 Introductory remarks . 24 B.2 Levels of housekeeping 24 Annex C (informative) Hybrid mixtures . 26 C.1 General .
26、 26 C.2 Ventilation. 26 C.3 Explosive limits . 26 C.4 Chemical reactions . 26 C.5 Minimum ignition parameters 26 IEC 60079-10-2:2015 IEC 2015 3 C.6 Final classification 26 Bibliography 27 Figure 1 Identification of zones on drawings 18 Figure A.1 Bag emptying station within a building and without ex
27、haust ventilation 20 Figure A.2 Bag emptying station with exhaust ventilation . 21 Figure A.3 Cyclone and filter with clean outlet outside building 22 Figure A.4 Drum tipper within a building without exhaust ventilation . 23 Table 1 Designation of zones depending on presence of dust 16 4 IEC 60079-1
28、0-2:2015 IEC 2015 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ EXPLOSIVE ATMOSPHERES Part 10-2: Classification of areas Explosive dust atmospheres FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical c
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39、uch patent rights. International Standard IEC 60079-10-2 has been prepared by subcommittee 31J: Classification of hazardous areas and istallation requirements, of IEC technical committee 31: Equipment for explosive atmospheres. This second edition of IEC 60079-10-2 cancels and replaces the first edi
40、tion of IEC 60079-10-2 published in 2009. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: IEC 60079-10-2:2015 IEC 2015 5 Type Explanation of the significance of the changes Clause Minor and editori
41、al changes Extension Major technical changes Definition of “atmospheric conditions” deleted 3 X Definition of “combustible dust” aligned with other documents per recommendations of WG 28 3.4 X Editorial change to definition of “explosive dust atmosphere” to delete mention of flyings, since the defin
42、ition of dust according to 60079-10-2 includes flyings. 3.5 X Definition of “combustible flyings” aligned with other documents per recommendations of WG 28 3.8 X Definition of “continuous formation of a dust cloud” added 3.14 X Definition of “catastrophic failure” added 3.20 X Definition of “ignitio
43、n temperature of a dust layer” aligned with other documents per recommendations of WG 28 and to change reference from 61241-2-1 to 80079-20-2 3.22 X Definitions of “zone 20, zone 21 and zone 22” added. These were previously incorrectly included in the body of the document. 3.25.1 3.25.2 3.25.3 X Dus
44、t cloud density and concentration added as factors to consider for a release 4.1 X Wording changed to require EPL to be noted on area classification drawing 4.1 X Notes 1 and 3 changed to normative text 4.1 X Reference to published sources for dust characteristics deleted 4.2 X Reference to 80079-20
45、-2 added 4.2 a) X Section on competence of personnel added 4.3 X Note on verification dossier deleted 5.2 X Example added for continuous grade of release, zone information moved to Clause 6 5.3 X Paragraph added about dust layers being raised into a cloud 7 X EPLs added to list for documentation, no
46、te added warning of variability in published dust data 8.1 X Symbol keys are identified as preferred 8.2 X Note added to zone 21 and zone 22 clause about distance around source of release Annex A X Zone 22 paragraph added to this example, and figure modified to show Zone 22 location A.2 X Annex B on
47、 hot surfaces deleted Annex B in previous edition X Annex D on explanation of EPLs deleted Annex D in previous edition X Annex on hybrid mixtures added Annex C X 6 IEC 60079-10-2:2015 IEC 2015 Explanation of the types of significant changes: 1. Minor and editorial changes: Clarification Decrease of
48、technical requirements Minor technical change Editorial corrections These are changes which modify requirements in an editorial or a minor technical way. They include changes of the wording to clarify technical requirements without any technical change, or a reduction in the level of existing requir
49、ement. 2. Extension: Addition of technical options These are changes which add new or modify existing technical requirements, in a way that new options are given, but without increasing the requirements that are fully compliant with the previous standard. Therefore, these will not have to be considered for existing area classifications in conformity with the preceding edition. 3. Major technical changes: Addition o
