1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 60079-26 Explosive Atmospheres Part 26: Equipment with Equipment Protection Level (EPL) Ga STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION
2、WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Explosive Atmospheres Part 26: Equipment with Equipment Protection Level (EPL) Ga, UL 60079-26 Third Edition, Dated April 21, 2017 Summary o
3、f Topics These revisions dated July 21, 2017 are being issued to incorporate the following changes and to reect the latest ANSI approval date of the Standard: Please note that the national difference document incorporates all of the US national differences for UL 60079-26 including the revisions not
4、ed below. UL 60079-26 is based on IEC 60079-26, Edition 3, published October, 2014. Revisions to Figure 1DV, Table 1DV, Figure 2DV and 6.2DV National Differences The requirements are substantially in accordance with Proposal(s) on this subject dated May 26, 2017. All rights reserved. No part of this
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9、er system. JULY 21, 2017 UL 60079-26 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JULY 21, 2017 UL 60079-26 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM
10、 UL APRIL 21, 2017 (Title Page Reprinted: July 21, 2017) 1 UL 60079-26 Standard for Explosive Atmospheres Part 26: Equipment with Equipment Protection Level (EPL) Ga Third Edition April 21, 2017 This ANSI/UL Standard for Safety consists of the Third Edition including revisions through July 21, 2017.
11、 The most recent designation of ANSI/UL 60079-26 as an American National Standard (ANSI) occurred on July 21, 2017. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page or Preface. The National Difference Page and IEC Foreword are also excluded from the ANSI ap
12、proval of IEC-based standards. 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 Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at https:/. ULs Standards for Safety are copyrighte
13、d 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 Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2017 UNDERWRITERS LABORATORIES INC. ANSI/UL 60079-26-2017
14、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JULY 21, 2017 UL 60079-26 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS Preface (UL) 4 National Diffe
15、rences 6 FOREWORD 7 1 Scope .10 2 Normative references .10 3 Terms and denitions 11 4 Requirements for design and construction 11 4.1 Protection measures against ignition hazards of the electrical circuits 11 4.2 Equipment with moving parts 18B 4.3 Process connection 18B 5 Type tests 19 5.1 Standard
16、ized types of protection 19 5.2 Separation elements .21 5.3 Temperature evaluation 21 6 Marking .21 6.1 General 21 6.2 Examples of marking 22 7 Instructions 22 7.1 Separation elements: 22 7.2 Process connection: .23 7.3 EPL allocation 23 Bibliography JULY 21, 2017 UL 60079-26 3UL COPYRIGHTED MATERIA
17、L NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Preface (UL) This UL Standard is based on IEC Publication 60079-26: third edition Explosive Atmospheres Part 26: Equipment with Equipment Protection Level (EPL) Ga, as revised by corrigendum 60079-26. IEC publicatio
18、n 60079-26 is copyrighted by the IEC. Efforts have been made to synchronize the UL edition number with that of the corresponding IEC standard with which this standard is harmonized. As a result, one or more UL edition numbers have been skipped to match that of the IEC edition number. The text, gures
19、 and tables of IEC Publication Explosive Atmospheres Part 26: Equipment with Equipment Protection Level (EPL) Ga, IEC 60079-26, copyright October 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 rep
20、roduced with permission from ANSI. ANSI should be contacted regarding the reproduction of any portion of the IEC material. The IEC Foreword and Introduction are not a part of the requirements of this Standard but are included for information purposes only. Copies of IEC Publication 60079-26 may be p
21、urchased from ANSI, 11 West 42nd Street, New York, New York, 10036, (212) 642-4900. Note Although the intended primary application of this Standard is 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 parti
22、cular purpose. The following people served as members of STP 60079 and participated in the review of this standard: NAME COMPANY *B. Zimmermann, Chair R Stahl Inc. *T. Adam FM Approvals LLC R. Allen Honeywell Inc. D. Ankele UL LLC S. Bihler-Lopez CML Inc. S. Blais Appleton Group K. Boegli KBB Consul
23、ting R. Brownlee Pepperl + Fuchs Inc. D. Burns Shell P any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and nongovernmental organizations liaising with the IEC also participate in this preparation. IEC collaborates
24、closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the re
25、levant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that th
26、e technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maxim
27、um extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certication bodies pro
28、vide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certication bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or i
29、ts directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses
30、 arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attentio
31、n is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60079-26 has been prepared by IEC technical committee 31: Equipment for exp
32、losive atmospheres. This third edition cancels and replaces the second edition published in 2006 and constitutes a technical revision. This edition includes the following signicant changes with respect to the previous edition: APRIL 21, 2017 UL 60079-26 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FU
33、RTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Type Changes Clause Minor and editorial changes Extension Major technical changes Notes deleted 1 X Reference to associated apparatus deleted 1 X Additional normative references included 3 X Requirements against mechanical and electrostat
34、ic ignition hazards deleted (now covered in IEC 60079-0) 4.1 X Requirement for separation element detailed regarding external inuences 4.1.3.2 X Intrinsic safety Ex ia as single type of protection including associated apparatus deleted (now covered by EPL) 4.2.2 (ed.2) X Encapsulation Ex ma as singl
35、e type of protection deleted (now covered by EPL) 4.2.3 (ed.2) X Conditions a) and b) linked with an “and” , therefore requirement of “ameproof joint” deleted in following clause. Both requirements already covered by separation elements and standardised process connections. 4.3 X Process connection
36、requires a sufficiently tight joint: IP66 added alternatively to IP67 4.3 X Requirement for isolated conductive components deleted (now covered in IEC 60079-0) 4.4 (ed.2) X Requirements for non-conductive enclosures deleted (now covered in IEC 60079-0) 4.5 (ed.2) X Test of partition walls according
37、to 4.1.3.2 b) is specied in more detail 5.2 C1 Marking example for associated apparatus deleted 6.2 b) X Note 3 with an additional example added 6.2 X Specication of material of partition wall required in instructions (also required in 4.1.3.2) 7X Alternative risk assessment method deleted (is now g
38、enerally introduced) AnnexA (ed.2) X NOTE The technical changes referred to include the signicance of technical changes in the revised IEC Standard, but they do not form an exhaustive list of all modications from the previous version. Explanation of the types of changes: A) Denitions 1) Minor and ed
39、itorial changes: Clarication Decrease of 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 level of existing requirement. APRIL 21, 2017 UL 60079-26 8
