ANSI UL 60079-1-2015 UL Standard for Safety Explosive Atmospheres C Part 1 Equipment Protection by Flameproof Enclosures d (Seventh Edition).pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 60079-1 Explosive Atmospheres Part 1: Equipment Protection by Flameproof Enclosures “d”UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM

2、 ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Explosive Atmospheres Part 1: Equipment Protection by Flameproof Enclosures “d”, UL 60079-1 Seventh Edition, Dated September 18, 2015 Summary of Topics Adoption of

3、 IEC 60079-1, Explosive Atmospheres Part 1: Equipment Protection by Flameproof Enclosures “d” (seventh edition, issued June 2014) as a new IEC-based UL standard, UL 60079-1 (IEC 60079-1:2014), with US National Differences. The new revised requirements are substantially in accordance with Proposal(s)

4、 on this subject dated January 23, 2015 and May 22, 2015. For further information regarding Summary of Requirements, please visit https:/ THIS SEVENTH EDITION REPLACES THE SIXTH EDITION. AS OF OCTOBER 1, 2020, THE SIXTH EDITION OF UL 60079-1 WILL BE WITHDRAWN. All rights reserved. No part of this pu

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10、 FROM UL SEPTEMBER 18, 2015 1 UL 60079-1 Standard for Explosive Atmospheres Part 1: Equipment Protection by Flameproof Enclosures “d” Seventh Edition September 18, 2015 This ANSI/UL Standard for Safety consists of the Seventh Edition. The most recent designation of ANSI/UL 60079-1 as an American Nat

11、ional Standard (ANSI) occurred on September 18, 2015. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, Preface, or effective date information. The National Difference Page and IEC Foreword are also excluded from the ANSI approval of IEC-based standards. An

12、y other portions of this ANSI/UL standard that were not processed in accordance with ANSI/UL requirements are noted at the beginning of the impacted sections. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Propo

13、sal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those St

14、andards shall remain the sole and exclusive property of UL. COPYRIGHT 2015 UNDERWRITERS LABORATORIES INC. ANSI/UL 60079-1-2015UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 18, 2015 UL 60079-1 2 No Text on This PageUL COPYRIGHTED

15、MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS PREFACE 8 National Differences . 11 FOREWORD . 12 1 Scope .21 2 Normative references .21 3 Terms and denitions 22 4 Level of protection (equipment protection level, EPL) .24 4.1 General 24 4.2 Requir

16、ements for level of protection “da” .25 4.3 Requirements for level of protection “db” .26 4.4 Requirements for level of protection “dc” .26 5 Flameproof joints 27 5.1 General requirements 27 5.2 Non-threaded joints 28 5.3 Threaded joints .40 5.4 Gaskets (including O-rings) .41 5.5 Equipment using ca

17、pillaries .45 6 Sealed joints 45 6.1 Cemented joints .45 6.2 Fused glass joints .47 7 Operating rods 47 8 Supplementary requirements for shafts and bearings .47 8.1 Joints of shafts 47 8.2 Bearings .51 9 Light-transmitting parts .51 10 Breathing and draining devices which form part of a ameproof enc

18、losure .51 10.1 General .51 10.2 Openings for breathing or draining .52 10.3 Composition limits 52 10.4 Dimensions 52 10.5 Elements with measurable paths .52 10.6 Elements with non-measurable paths .52 10.7 Removable devices .53 10.8 Mechanical strength 53 10.9 Breathing devices and draining devices

19、 when used as Ex components .53 11 Fasteners and openings .58 12 Materials .59 13 Entries for ameproof enclosures .61 13.1 General .61 13.2 Threaded holes 61 13.3 Non-threaded holes (for Group I only) 62 13.4 Cable glands 65 13.5 Conduit sealing devices .65 13.6 Plugs and sockets and cable couplers

20、66 13.7 Bushings 67 13.8 Blanking elements 67 14 Verication and tests 68 SEPTEMBER 18, 2015 UL 60079-1 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 15 Type tests .68 15.1 General .68 15.2 Tests of ability of the enclosure to withstand pr

21、essure 69 15.3 Test for non-transmission of an internal ignition 75 15.4 Tests of ameproof enclosures with breathing and draining devices 80 15.5 Tests for “dc” devices .83 16 Routine tests .84 16.1 General .84 16.2 Enclosures not incorporating a welded construction 85 16.3 Enclosures incorporating

22、a welded construction 85 16.4 Bushings not specic to one ameproof enclosure .86 16.5 Acceptance criteria .86 16.6 Batch testing 86 17 Switchgear for Group I 86 17.1 General .86 17.2 Means of isolation 87 17.3 Doors or covers 87 18 Lampholders and Iamp caps .88 18.1 General .88 18.2 Device preventing

23、 lamps working loose .88 18.3 Holders and caps for lamps with cylindrical caps .88 18.4 Holders for lamps with threaded caps .88 19 Non-metallic enclosures and non-metallic parts of enclosures 88 19.1 General .88 19.2 Resistance to tracking and creepage distances on internal surfaces of the enclosur

24、e walls 89 19.3 Requirements for type tests .89 19.4 Test of erosion by ame 89 20 Marking 90 20.1 General .90 20.2 Caution and warning markings .90 20.3 Informative markings 90 21 Instructions 91 Annex A (normative) Additional requirements for crimped ribbon elements and multiple screen elements of

25、breathing and draining devices Annex B (normative) Additional requirements for elements, with non-measurable paths of breathing and draining devices B.1 Sintered metal elements 93 B.2 Pressed metal wire elements 93 B.3 Metal foam elements .94 Annex C (normative) Additional requirements for ameproof

26、entry devices C.1 General .96 C.2 Constructional requirements .96 C.2.1 Sealing methods 96 C.2.2 Flameproof joints 98 SEPTEMBER 18, 2015 UL 60079-1 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL C.2.3 Constructional requirements for Ex bla

27、nking elements .99 C.2.4 Constructional requirements for Ex thread adapters 102 C.3 Type tests .102 C.3.1 Sealing test 102 C.3.2 Test of mechanical strength .104 C.3.3 Type tests for Ex blanking elements 105 C.3.4 Type tests for Ex thread adapters 106 Annex D (normative) Empty ameproof enclosures as

28、 Ex components D.1 General 108 D.2 Introductory remarks 108 D.3 Ex component enclosure requirements 108 D.4 Utilization of an Ex component enclosure certicate to prepare an equipment certicate . . .111 D.4.1 Procedure .111 D.4.2 Application of the schedule of limitations 111 Annex E (normative) Cell

29、s and batteries used in ameproof “d” enclosures E.1 Introductory remarks 112 E.2 Acceptable electrochemical systems 112 E.3 General requirements for cells (or batteries) inside ameproof enclosures .113 E.4 Arrangement of safety devices .113 E.4.1 Prevention of excessive temperature and cell damage 1

30、13 E.4.2 Prevention of cell polarity reversal or reverse charging by another cell in the same battery 114 E.4.3 Prevention of inadvertent charging of a battery by other voltage sources in the enclosure 115 E.5 Recharging of secondary cells inside ameproof enclosures .116 E.6 Rating of protection dio

31、des and reliability of protection devices .117 Annex F (informative) Mechanical properties for screws and nuts Annex G (normative) Additional requirements for ameproof enclosures with an internal source of release (containment system) G.1 General .119 G.2 Release conditions 120 G.2.1 No release 120

32、G.2.2 Limited release of a gas or vapour .120 G.2.3 Limited release of a liquid .120 G.3 Design requirements for the containment system .120 G.3.1 General design requirements 120 G.3.2 Infallible containment system 121 G.3.3 Containment system with a limited release 121 G.4 Type tests for the contai

33、nment system 122 G.4.1 Overpressure test 122 G.4.2 Leakage test for an infallible containment system 122 G.4.3 Leakage test for a containment system with a limited release 122 SEPTEMBER 18, 2015 UL 60079-1 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMI

34、SSION FROM UL Annex H (normative) Requirements for machines with ameproof “d” enclosures fed from converters H.1 General 123 H.2 Construction requirements for bearings 123 H.3 Temperature requirements .123 Bibliography SEPTEMBER 18, 2015 UL 60079-1 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER

35、 REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 18, 2015 UL 60079-1 7 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL PREFACE This harmonized standard is based on IEC Publication 60079-1: 2014 edition,

36、Explosive Atmospheres - Part 1: Equipment Protection by Flameproof Enclosures d issued 06-2014. IEC publication IEC 60079-1 is copyrighted by the IEC. This standard is considered suitable for use for conformity assessment within the stated scope of the standard. This standard has been approved by th

37、e American National Standards Institute (ANSI) as an American National Standard. Application of Standard Where reference is made to a specic number of samples to be tested, the specied number is to be considered a minimum quantity. Note: Although the intended primary application of this standard is

38、stated in its scope, it is important to note that it remains the responsibility of the users of the standard to judge its suitability for their particular purpose. Level of Harmonization This standard adopts the IEC text with national differences. All national differences from the IEC text are inclu

39、ded in the UL version of the standard. While the technical content is the same in ULs version, the format and presentation may differ. IEC Copyright For UL, the text, gures and tables of IEC publication 60079-1, Explosive Atmospheres - Part 1: Equipment Protection by Flameproof Enclosures d , copyri

40、ght 2014 are used in this standard with the consent of the IEC and the American National Standards Institute (ANSI). The IEC copyrighted material has been reproduced with permission from ANSI. ANSI should be contacted regarding the reproduction of any portion of the IEC material. The IEC Foreword an

41、d Introduction are not a part of the requirements of this standard but are included for information purposes only. Copies of IEC Publication 60079-1 may be purchased from ANSI, 25 West 43rd Street, 4th Floor, New York, New York, 10036, (212) 642- 4900. The following people served as members of STP 6

42、0079 and participated in the review of this standard: SEPTEMBER 18, 2015 UL 60079-1 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL NAME COMPANY T. Schnaare, Chair Rosemount Inc. *T. Adam FM Approvals LLC R. Allen Honeywell Inc. D. Ankele U

43、L LLC R. Baran Koehler Bright Start LLC S. Bihler Atec Training & Certication LLC S. Blais Appleton Group K. Boegli KBB Consulting R. Brownlee Pepperl + Fuchs Inc. D. Burns Shell P&T Innovation / R&D E. Charkey Consultant C. Coache National Fire Protection Association D. Cook Shelby County Departmen

44、t of Development Services M. Coppler Det Norske Veritas Certication Inc. T. Crawford Intertek Testing Services G. Cullen Ex Industries D. Mario Santos Ltd. T. Dubaniewicz NIOSH M. Egloff Montana Tech, University of Montana D. El Tawy Solar Turbines Inc. *A. Engler Det Norske Veritas DNV W. Fiske Int

45、ertek G. Gurinder GE Power & Water D. Grady Nuvotem Talema R. Holub DuPont P. House Thermon Mfg. Co. *P. Kelly UL LLC S. Kiddle ABB Inc P. Kovscek Industrial Scientic Corp. A. Kreider Phoenix Contact Development & Manufacturing Inc. C. Kurtzman Rosemount Inc. W. Lawrence FM Approvals LLC E. Leubner

46、Eatons Crouse-Hinds Business W. Lowers WCL Corp. *N. Ludlam FM Approvals Ltd. *R. Masek CSA Group E. Massey Baldor Electric Co. W. McBride Northern Electric Co. T. Michalski Killark Electric Mfg. Co. J. Miller Detector Electronics Corp. *O. Murphy Honeywell Inc. D. Nachtigall Rockwell Automation A.

47、Page Bud Page Consultant T. Patel Littelfuse Inc. *K. Robinson Occupational Safety and Health Adm. J. Ruggieri General Machine Corp. *J. Scheller Baldor Electric Co. R. Seitz ARTECH Engineering S. Sharma General Electric Co. (GE) R. Sierra US Coast Guard M. Spencer Columbia Gas Transmission SEPTEMBE

48、R 18, 2015 UL 60079-1 9 Table Continued on Next PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Table Continued NAME COMPANY *R. Teather Det Norske Veritas Certication Inc. D. Wechsler American Chemistry Council R. Wigg E-x Solutions Int

49、ernational Pty Ltd. R. Zalosh Firexplo * Non-voting member SEPTEMBER 18, 2015 UL 60079-1 10UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL National Differences National Differences from the text of International Electrotechnical Commission (IEC) Publication 60079-1, Explosive Atmospheres Part 1: Equipment Protection by Flameproof Enclosures “d”, (seventh edition, issued by IEC June 2014), are indicated by no