ANSI UL 60079-30-1-2017 UL Standard for Safety Explosive Atmospheres C Part 30-1 Electrical Resistance Trace Heating C General and Testing Requirements (First Edition).pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 60079-30-1 Explosive Atmospheres Part 30-1: Electrical Resistance Trace Heating General and Testing Requirements STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODU

2、CTION OR DISTRIBUTION 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 30-1: Electrical Resistance Trace Heating General and Testing Requirements, UL 60079-30-1 F

3、irst Edition, Dated May 5, 2017 Summary of Topics Adoption of IEC/IEEE 60079-30-1, Explosive Atmospheres - Part 30-1: Electrical Resistance Trace Heating General and Testing Requirements (rst edition, issued by IEC September 2015) as a new IEC/IEEE based UL standard, UL 60079-30-1 with US National D

4、ifferences. The requirements are substantially in accordance with Proposal(s) on this subject dated March 10, 2017. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recordin

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9、AY 5, 2017 UL 60079-30-1 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 5, 2017 1 UL 60079-30-1 Standard for Explosive Atmospheres Part 30-1: Electrical Resistance Trace Heating General and Testing Requirements F

10、irst Edition May 5, 2017 This ANSI/UL Standard for Safety consists of the First Edition. The most recent designation of ANSI/UL 60079-30-1 as an American National Standard (ANSI) occurred on May 5, 2017. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, and Title Page.

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13、operty of UL. COPYRIGHT 2017 UNDERWRITERS LABORATORIES INC. ANSI/UL 60079-30-1-2017UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 5, 2017 UL 60079-30-1 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTIO

14、N OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS Preface (UL) 6 National Differences 8 FOREWORD 9 INTRODUCTION . 14 1 Scope .15 2 Normative references .19 3 Terms and denitions 20 4 General requirements 27 4.1 General 27 4.2 Mechanical strength .28 4.3 Terminations and connections 28 4.4 Circui

15、t protection requirements for branch circuits .28 4.5 Temperature requirements 29 5 Testing .32 5.1 Type tests 32 5.2 Routine tests .60 6 Marking .60 6.1 Product markings for trace heaters 60 6.2 Markings for eld assembled components 61 7 Documentation requirements 61 7.1 General 61 7.2 Circuit desi

16、gn documentation .62 7.3 Trace heating system documentation 62 7.4 Instructions for installation of trace heating system 64 7.5 Instructions for commissioning 65 7.6 Instructions for maintenance / repair or modication .65 Annex A (informative) Type test matrix for EPLs Gb/Gc/Db/Dc (Refer to IEC 6007

17、9-14 for the relationship of EPLs to Zones) Annex B (informative) Checklist for installation Annex C (normative) Trace heater product design verication methodology C.1 General .68 C.2 Design methodology and selection of trace heaters 68 C.3 Stabilized design calculations .68 C.4 Trace heater perform

18、ance and equilibrium conditions 69 C.5 Heat loss calculations 72 C.6 Heat loss design safety factor .74 C.7 Maximum temperature determination .74 C.7.1 Theoretical pipe and sheath temperature calculations Metallic applications .74 C.7.2 Theoretical vessel and sheath temperature calculations Metallic

19、 applications .76 MAY 5, 2017 UL 60079-30-1 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL C.7.3 Sheath temperature metallic applications utilizing a temperature limiter control sensing the trace heater sheath or an articial hot spot 77 C.

20、7.4 Theoretical sheath temperature calculations Non-metallic applications .78 C.7.5 Sheath temperature non-metallic applications utilizing a temperature limiter control sensing the trace heater sheath or an articial hot spot 79 Annex D (normative) Requirements for Division 1 and Division 2 trace hea

21、ting systems D.1 Application 80 D.2 General .80 D.3 Terminations and connections .80 D.4 Control and temperature requirements 80 D.4.1 General 80 D.4.2 Stabilized design 81 D.4.3 Controlled design 81 D.4.4 Requirements for protective device in Divisions 1 and 2 82 D.5 Type tests 82 D.5.1 Division 1

22、trace heating equipment 82 D.5.2 Division 2 equipment .82 D.6 Marking .83 D.7 Instructions Installation requirements .83 Annex E (normative) Type test matrix for Division 1 and 2 explosive atmospheres Bibliography MAY 5, 2017 UL 60079-30-1 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUC

23、TION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 5, 2017 UL 60079-30-1 5 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Preface (UL) This UL Standard is based on IEC/IEEE Publication 60079-30-1: rst edition Explosive

24、Atmospheres - Part 30-1: Electrical Resistance Trace Heating General and Testing Requirements. IEC publication 60079-30-1 is copyrighted by the IEC. The text, gures and tables of IEC Publication Explosive Atmospheres Part 30-1: Electrical Resistance Trace Heating - General and Testing Requirements,

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