IEC 60079-1-2014 Explosive atmospheres - Part 1 Equipment protection by flameproof enclosures d 《易爆环境.第1部分 用隔爆外壳 d 的设备保护》.pdf

1、 IEC 60079-1 Edition 7.0 2014-06 INTERNATIONAL STANDARD NORME INTERNATIONALE Explosive atmospheres Part 1: Equipment protection by flameproof enclosures “d” Atmosphres explosives Partie 1: Protection du matriel par enveloppes antidflagrantes d IEC 60079-1:2014-06(en-fr) colour inside THIS PUBLICATIO

2、N IS COPYRIGHT PROTECTED Copyright 2014 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, 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

3、either IEC or IECs member National Committee in the country of the requester. If you have any questions about IEC 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.

4、Droits de reproduction rservs. Sauf indication contraire, aucune partie de cette publication ne peut tre reproduite ni utilise sous quelque forme que ce soit et par aucun procd, lectronique ou mcanique, y compris la photocopie et les microfilms, sans laccord crit de lIEC ou du Comit national de lIEC

5、 du pays du demandeur. Si vous avez des questions sur le copyright de lIEC ou si vous dsirez obtenir des droits supplmentaires sur cette publication, utilisez les coordonnes ci-aprs ou contactez le Comit national de lIEC de votre pays de rsidence. IEC Central Office Tel.: +41 22 919 02 11 3, rue de

6、Varemb Fax: +41 22 919 03 00 CH-1211 Geneva 20 infoiec.ch Switzerland 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

7、 publications The technical content of IEC publications is kept under 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

8、 bibliographical information on IEC International Standards, Technical Specifications, 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 criter

9、ia (reference number, text, technical committee,). It also gives information on projects, 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 al

10、so once a month by email. Electropedia - www.electropedia.org The worlds leading online dictionary of electronic and electrical terms containing more than 30 000 terms and definitions in English and French, with equivalent terms in 14 additional languages. Also known as the International Electrotech

11、nical Vocabulary (IEV) online. IEC Glossary - std.iec.ch/glossary More than 55 000 electrotechnical terminology 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

12、 77, 86 and CISPR. IEC Customer Service Centre - webstore.iec.ch/csc If you wish to give us your feedback on this publication or need further assistance, please contact the Customer Service Centre: csciec.ch. A propos de lIEC La Commission Electrotechnique Internationale (IEC) est la premire organi

13、sation mondiale qui labore et publie des Normes internationales pour tout ce qui a trait llectricit, llectronique et aux technologies apparentes. A propos des publications IEC Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possdez ldition la plus rcent

14、e, un corrigendum ou amendement peut avoir t publi. Catalogue IEC - webstore.iec.ch/catalogue Application autonome pour consulter tous les renseignements bibliographiques sur les Normes internationales, Spcifications techniques, Rapports techniques et autres documents de lIEC. Disponible pour PC, Ma

15、c OS, tablettes Android et iPad. Recherche de publications IEC - www.iec.ch/searchpub La recherche avance permet de trouver des publications IEC en utilisant diffrents critres (numro de rfrence, texte, comit dtudes,). Elle donne aussi des informations sur les projets et les publications remplaces ou

16、 retires. IEC Just Published - webstore.iec.ch/justpublished Restez inform sur les nouvelles publications IEC. Just Published dtaille les nouvelles publications parues. Disponible en ligne et aussi une fois par mois par email. Electropedia - www.electropedia.org Le premier dictionnaire en ligne de t

17、ermes lectroniques et lectriques. Il contient plus de 30 000 termes et dfinitions en anglais et en franais, ainsi que les termes quivalents dans 14 langues additionnelles. Egalement appel Vocabulaire Electrotechnique International (IEV) en ligne. Glossaire IEC - std.iec.ch/glossary Plus de 55 000 en

18、tres terminologiques lectrotechniques, en anglais et en franais, extraites des articles Termes et Dfinitions des publications IEC parues depuis 2002. Plus certaines entres antrieures extraites des publications des CE 37, 77, 86 et CISPR de lIEC. Service Clients - webstore.iec.ch/csc Si vous dsirez n

19、ous donner des commentaires sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 60079-1 Edition 7.0 2014-06 INTERNATIONAL STANDARD NORME INTERNATIONALE Explosive atmospheres Part 1: Equipment protection by flameproof enclosures “d” Atmosphres explosives Partie 1: Prote

20、ction du matriel par enveloppes antidflagrantes d INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE XD ICS 29.260.20 PRICE CODE CODE PRIX ISBN 978-2-8322-1663-7 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Elec

21、trotechnique 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. colour inside 2 IEC 60079-1:2014 IEC 2014 CONTENTS FOREWORD . 8 1 Scope 16 2 Normative re

22、ferences 16 3 Terms and definitions 17 4 Level of protection (equipment protection level, EPL) 19 4.1 General . 19 4.2 Requirements for level of protection “da” 19 4.3 Requirements for level of protection “db” 20 4.4 Requirements for level of protection “dc” . 20 4.4.1 General . 20 4.4.2 Constructio

23、n of “dc” devices 20 4.4.3 Tests for “dc” devices 20 5 Flameproof joints . 21 5.1 General requirements . 21 5.2 Non-threaded joints 22 5.2.1 Width of joints (L) 22 5.2.2 Gap (i) . 22 5.2.3 Spigot joints. 22 5.2.4 Holes in joint surfaces . 23 5.2.5 Conical joints . 25 5.2.6 Joints with partial cylind

24、rical surfaces (not permitted for Group IIC) . 25 5.2.7 Flanged joints for acetylene atmospheres 26 5.2.8 Serrated joints . 26 5.2.9 Multi-step joints . 27 5.3 Threaded joints . 30 5.4 Gaskets (including O-rings) . 30 5.5 Equipment using capillaries 32 6 Sealed joints 32 6.1 Cemented joints 32 6.1.1

25、 General . 32 6.1.2 Mechanical strength. 32 6.1.3 Width of cemented joints . 33 6.2 Fused glass joints . 33 6.2.1 General . 33 6.2.2 Width of fused glass joints . 33 7 Operating rods . 33 8 Supplementary requirements for shafts and bearings. 34 8.1 Joints of shafts . 34 8.1.1 General . 34 8.1.2 Cyli

26、ndrical joints 34 8.1.3 Labyrinth joints 34 8.1.4 Joints with floating glands 34 8.2 Bearings . 36 8.2.1 Sleeve bearings . 36 8.2.2 Rolling-element bearings . 36 IEC 60079-1:2014 IEC 2014 3 9 Light-transmitting parts 36 10 Breathing and draining devices which form part of a flameproof enclosure 37 1

27、0.1 General . 37 10.2 Openings for breathing or draining 37 10.3 Composition limits . 37 10.4 Dimensions . 37 10.5 Elements with measurable paths . 37 10.6 Elements with non-measurable paths 37 10.7 Removable devices . 38 10.7.1 General . 38 10.7.2 Mounting arrangements of the elements 38 10.8 Mecha

28、nical strength 38 10.9 Breathing devices and draining devices when used as Ex components . 38 10.9.1 General . 38 10.9.2 Mounting arrangements of the elements and components 38 10.9.3 Type tests for breathing and draining devices used as Ex components 38 10.9.4 Ex component certificate . 41 11 Faste

29、ners and openings 42 12 Materials . 43 13 Entries for flameproof enclosures 44 13.1 General . 44 13.2 Threaded holes . 44 13.3 Non-threaded holes (for Group I only) . 44 13.4 Cable glands . 45 13.5 Conduit sealing devices 45 13.6 Plugs and sockets and cable couplers 46 13.7 Bushings . 47 13.8 Blanki

30、ng elements. 47 14 Verification and tests . 47 15 Type tests . 48 15.1 General . 48 15.2 Tests of ability of the enclosure to withstand pressure 49 15.2.1 General . 49 15.2.2 Determination of explosion pressure (reference pressure) . 49 15.2.3 Overpressure test 52 15.3 Test for non-transmission of a

31、n internal ignition 53 15.3.1 General . 53 15.3.2 Electrical equipment of Groups I, IIA and IIB 55 15.3.3 Electrical equipment of Group lIC 56 15.4 Tests of flameproof enclosures with breathing and draining devices . 57 15.4.1 General . 57 15.4.2 Tests of ability of the enclosure to withstand pressu

32、re . 57 15.4.3 Thermal tests . 58 15.4.4 Test for non-transmission of an internal ignition . 58 15.5 Tests for “dc” devices . 59 15.5.1 General . 59 15.5.2 Preparation of “dc” samples . 59 15.5.3 Test conditions for “dc” devices . 59 4 IEC 60079-1:2014 IEC 2014 16 Routine tests . 60 16.1 General . 6

33、0 16.2 Enclosures not incorporating a welded construction 61 16.3 Enclosures incorporating a welded construction 61 16.4 Bushings not specific to one flameproof enclosure 61 16.5 Acceptance criteria . 61 16.6 Batch testing . 61 17 Switchgear for Group I . 62 17.1 General . 62 17.2 Means of isolation

34、 . 62 17.2.1 General . 62 17.3 Doors or covers 62 17.3.1 Quick-acting doors or covers . 62 17.3.2 Doors or covers fixed by screws 62 17.3.3 Threaded doors or covers 63 18 Lampholders and Iamp caps 63 18.1 General . 63 18.2 Device preventing lamps working loose . 63 18.3 Holders and caps for lamps wi

35、th cylindrical caps. 63 18.4 Holders for lamps with threaded caps . 63 19 Non-metallic enclosures and non-metallic parts of enclosures . 63 19.1 General . 63 19.2 Resistance to tracking and creepage distances on internal surfaces of the enclosure walls . 64 19.3 Requirements for type tests 64 19.4 T

36、est of erosion by flame 64 20 Marking . 64 20.1 General . 64 20.2 Caution and warning markings 65 20.3 Informative markings . 65 21 Instructions 65 Annex A (normative) Additional requirements for crimped ribbon elements and multiple screen elements of breathing and draining devices 66 Annex B (norma

37、tive) Additional requirements for elements, with non-measurable paths of breathing and draining devices 67 B.1 Sintered metal elements . 67 B.2 Pressed metal wire elements 67 B.3 Metal foam elements . 68 Annex C (normative) Additional requirements for flameproof entry devices 69 C.1 General . 69 C.2

38、 Constructional requirements . 69 C.2.1 Sealing methods 69 C.2.2 Flameproof joints . 70 C.2.3 Constructional requirements for Ex blanking elements . 71 C.2.4 Constructional requirements for Ex thread adapters. 73 C.3 Type tests . 73 C.3.1 Sealing test . 73 C.3.2 Test of mechanical strength . 74 IEC

39、60079-1:2014 IEC 2014 5 C.3.3 Type tests for Ex blanking elements 75 C.3.4 Type tests for Ex thread adapters 76 Annex D (normative) Empty flameproof enclosures as Ex components . 78 D.1 General . 78 D.2 Introductory remarks . 78 D.3 Ex component enclosure requirements 78 D.4 Utilization of an Ex com

40、ponent enclosure certificate to prepare an equipment certificate 80 D.4.1 Procedure 80 D.4.2 Application of the schedule of limitations . 80 Annex E (normative) Cells and batteries used in flameproof “d” enclosures . 81 E.1 Introductory remarks . 81 E.2 Acceptable electrochemical systems . 81 E.3 Ge

41、neral requirements for cells (or batteries) inside flameproof enclosures 82 E.4 Arrangement of safety devices 82 E.4.1 Prevention of excessive temperature and cell damage . 82 E.4.2 Prevention of cell polarity reversal or reverse charging by another cell in the same battery 83 E.4.3 Prevention of in

42、advertent charging of a battery by other voltage sources in the enclosure . 83 E.5 Recharging of secondary cells inside flameproof enclosures . 84 E.6 Rating of protection diodes and reliability of protection devices . 85 Annex F (informative) Mechanical properties for screws and nuts 86 Annex G (no

43、rmative) Additional requirements for flameproof enclosures with an internal source of release (containment system) . 87 G.1 General . 87 G.2 Release conditions 87 G.2.1 No release . 87 G.2.2 Limited release of a gas or vapour . 88 G.2.3 Limited release of a liquid 88 G.3 Design requirements for the

44、containment system 88 G.3.1 General design requirements . 88 G.3.2 Infallible containment system . 88 G.3.3 Containment system with a limited release 89 G.4 Type tests for the containment system 89 G.4.1 Overpressure test 89 G.4.2 Leakage test for an infallible containment system 89 G.4.3 Leakage te

45、st for a containment system with a limited release 90 Annex H (normative) Requirements for machines with flameproof “d” enclosures fed from converters . 91 H.1 General . 91 H.2 Construction requirements for bearings . 91 H.3 Temperature requirements 91 Bibliography 92 Figure 1 Example of constructio

46、n for indirect checking of a flanged Group I flameproof joint . 22 Figure 2 Spigot joints . 23 Figure 3 Holes in surfaces of flanged joints, example 1 24 6 IEC 60079-1:2014 IEC 2014 Figure 4 Holes in surfaces of flanged joints, example 2 24 Figure 5 Holes in surfaces of flanged joints, example 3 24

47、Figure 6 Holes in surfaces of spigot joints, example 1 24 Figure 7 Holes in surfaces of spigot joints, example 2 25 Figure 8 Holes in surfaces of spigot joints, example 3 25 Figure 9 Examples of joint constructions 26 Figure 10 Illustration of the requirements concerning gaskets Example 1 31 Figure

48、11 Illustration of the requirements concerning gaskets Example 2 31 Figure 12 Illustration of the requirements concerning gaskets Example 3 31 Figure 13 Illustration of the requirements concerning gaskets Example 4 31 Figure 14 Illustration of the requirements concerning gaskets Example 5 31 Figure

49、15 Illustration of the requirements concerning gaskets Example 6 31 Figure 16 Illustration of the requirements concerning gaskets Example 7 32 Figure 17 Example of cylindrical joint for shaft of rotating electrical machine 35 Figure 18 Example of labyrinth joint for shaft of rotating electrical machine . 35 Figure 19 Example of joint with floating gland for shaft of rotating electrical machine 35 Figure 20