EN 60079-30-2-2017 en Explosive atmospheres - Part 30-2 Electrical resistance trace heating - Application guide for design installation and maintenance.pdf

1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Explosive atmospheresPart 30-2: Electrical resistance trace heating - Application guide for design, installation and maintenanceBS EN 60079-30-2:2017EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60079-30-2 July 2

2、017 ICS 29.260.20 Supersedes EN 60079-30-2:2007 English Version Explosive atmospheres - Part 30-2: Electrical resistance trace heating - Application guide for design, installation and maintenance (IEC/IEEE 60079-30-2:2015, modified) Atmosphres explosives - Partie 30-2: Traage par rsistance lectrique

3、 - Guide dapplication pour la conception, linstallation et la maintenance (IEC/IEEE 60079-30-2:2015 , modifie) Explosionsgefhrdeter Bereiche - Teil 30-2: Elektrische Widerstands-Begleitheizungen - Anwendungsleitfaden fr Entwurf, Installation und Instandhaltung (IEC/IEEE 60079-30-2:2015 , modifiziert

4、) This European Standard was approved by CENELEC on 2017-04-03. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographica

5、l references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibili

6、ty of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, For

7、mer Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Elect

8、rotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. R

9、ef. No. EN 60079-30-2:2017 E National forewordThis British Standard is the UK implementation of EN 60079-30-2:2017. It is derived from IEC/IEEE 60079-30-2:2015. It supersedes BS EN 60079-30-2:2007, which is withdrawn.The CENELEC common modifications have been implemented at the appropriate places in

10、 the text. The start and finish of each common modification is indicated in the text by tags . The UK participation in its preparation was entrusted to Technical Committee EXL/31, Equipment for explosive atmospheres.A list of organizations represented on this committee can be obtained on request to

11、its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 94945 6ICS 29.260.20Compliance with a British Standar

12、d cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2018.Amendments/corrigenda issued since publicationDate Text affected BRITISH STANDARDBS EN 60079-30-2:2017EUROPEAN STANDARD NORME EUR

13、OPENNE EUROPISCHE NORM EN 60079-30-2 July 2017 ICS 29.260.20 Supersedes EN 60079-30-2:2007 English Version Explosive atmospheres - Part 30-2: Electrical resistance trace heating - Application guide for design, installation and maintenance (IEC/IEEE 60079-30-2:2015, modified) Atmosphres explosives -

14、Partie 30-2: Traage par rsistance lectrique - Guide dapplication pour la conception, linstallation et la maintenance (IEC/IEEE 60079-30-2:2015 , modifie) Explosionsgefhrdeter Bereiche - Teil 30-2: Elektrische Widerstands-Begleitheizungen - Anwendungsleitfaden fr Entwurf, Installation und Instandhalt

15、ung (IEC/IEEE 60079-30-2:2015 , modifiziert) This European Standard was approved by CENELEC on 2017-04-03. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alte

16、ration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language

17、 made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Cze

18、ch Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the U

19、nited Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CENELEC All rights of exploitation in any form and by any mean

20、s reserved worldwide for CENELEC Members. Ref. No. EN 60079-30-2:2017 E BS EN 60079-30-2:2017EN 60079-30-2:2017 (E) 2 European foreword This document (EN 60079-30-2:2017) consists of the text of IEC/IEEE 60079-30-2:2015 prepared by IEC/TC 31 “Equipment for explosive atmospheres“ in collaboration wit

21、h IEEE Standards Association (IEEE-SA), together with the common modifications prepared by CLC/TC 31 “Electrical apparatus for potentially explosive atmospheres“. The following dates are fixed: latest date by which the document has to be implemented atnational level by publication of an identical na

22、tionalstandard or by endorsement(dop) 2018-04-03 latest date by which the national standards conflicting withthe document have to be withdrawn(dow) 2020-04-03 This document supersedes EN 60079-30-2:2007 Attention is drawn to the possibility that some of the elements of this document may be the subje

23、ct of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC/IEEE 60079-30-2:2015 was approved by CENELEC as a European Standard with agreed common modifications. COMMON MODIFICATION

24、S NOTE The Division method of area classification of IEC/IEEE 60079-30-2:2015 is not applicable for a European Standard, because a correlation with the Equipment Categories according to the European Directive 2014/34/EU is not possible. Consequently requirements for Divisions 1 and 2 and references

25、to NFPA 70 and CSA C22.1 are excluded from this standard. BIBLIOGRAPHYAdd the following notes for the standards indicated: NOTE Harmonized as EN 60079-14. NOTE NOTE IEC 60079-14 IEC 60079-17 IEC 60079-7 IEC 60364-1 NOTE Harmonized as EN 60079-17. Harmonized as EN 60079-7. Harmonized as HD 60364-1. B

26、S EN 60079-30-2:2017EN 60079-30-2:2017 (E) 3 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For

27、 dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. NOTE 2 Up-t

28、o-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu. Publication Year Title EN/HD Year IEC 60050-426 - International Electrotechnical Vocabulary - Part 426: Equipment for explosive atmospheres - - IEC 60079-0 - Explosive atmosphe

29、res - Part 0: Equipment - General requirements EN 60079-0 - IEC 60079-15 - Explosive atmospheres - Part 15: Equipment protection by type of protection “n“ EN 60079-15 - IEC/IEEE 60079-30-1 - Explosive atmospheres - Part 30-1: Electrical resistance trace heating - General and testing requirements EN

30、60079-30-1 - BS EN 60079-30-2:2017 2 IEC/IEEE 60079-30-2:2015 IEC/IEEE 2015 CONTENTS FOREWORD . 6 1 Scope 10 2 Normative references 10 3 Terms and definitions 10 4 Application considerations . 10 4.1 General . 10 4.2 Corrosive areas 11 4.3 Process temperature accuracy 11 4.3.1 Type I 11 4.3.2 Type I

31、I . 11 4.3.3 Type III 11 4.4 Installation considerations . 11 5 Thermal insulation . 12 5.1 General . 12 5.2 Selection of insulating material . 12 5.3 Selection of weather barrier (cladding) 13 5.4 Selection of economical thickness to provide optimum trace heating design 13 5.5 Double insulation 14

32、6 System design . 17 6.1 General . 17 6.2 Purpose of, and major requirement for, trace heating 17 6.3 Training 18 6.4 Selection of trace heater . 18 6.4.1 General . 18 6.4.2 Site-fabricated trace heaters 18 6.4.3 Specific types of trace heating . 19 6.5 Maximum temperature determination 19 6.5.1 Gen

33、eral . 19 6.5.2 PTC characteristic . 19 6.5.3 Stabilized design . 20 6.5.4 Controlled design. 20 6.6 Heat up and cool down considerations 20 6.7 Design information 20 6.7.1 Design information documentation . 20 6.7.2 Isometric or trace heater configuration line lists and load charts 21 6.8 Power sys

34、tem . 22 6.9 Earthing requirements . 22 6.10 Earth-fault protection of equipment . 23 6.11 Start-up at minimum ambient temperatures . 23 6.12 Long trace heater runs 23 6.13 Flow pattern analysis 23 6.14 Dead-leg control technique . 25 6.15 Chimney effect 25 6.16 Safety shower and eyewash station des

35、ign requirements 26 BS EN 60079-30-2:2017IEC/IEEE 60079-30-2:2015 3 IEC/IEEE 2015 7 Control and monitoring 26 7.1 General . 26 7.2 Mechanical controllers 27 7.3 Electronic controllers 27 7.4 Application suitability 27 7.5 Location of controllers . 27 7.6 Location of sensors . 28 7.7 Alarm considerat

36、ions 28 7.7.1 General . 28 7.7.2 Trace heating circuit alarm 28 7.7.3 Temperature alarms 29 7.7.4 Other alarms 29 7.7.5 Integrated control 29 8 Recommendations for installation 29 8.1 General . 29 8.2 Preparatory work 30 8.2.1 General . 30 8.2.2 Scheduling and coordination 30 8.2.3 Confirmation of e

37、quipment . 30 8.2.4 Receiving materials . 30 8.2.5 Warehousing and handling 30 8.2.6 Personnel aspects . 30 8.3 Installation of trace heating circuits . 30 8.3.1 Coordination and equipment verification 30 8.3.2 Pre-installation testing and design verification . 31 8.3.3 Visual examination 31 8.3.4 I

38、nsulation resistance test . 31 8.3.5 Component substitution . 31 8.3.6 Location of power supply . 31 8.3.7 Installation of trace heaters . 32 8.3.8 Connections and terminations 34 8.4 Installation of control and monitoring equipment . 36 8.4.1 General . 36 8.4.2 Verification of equipment suitability

39、 36 8.4.3 Temperature controller and monitoring devices 36 8.4.4 Sensor considerations . 36 8.4.5 Controller operation, calibration, and access . 40 8.4.6 Necessary modifications 40 8.5 Installation of thermal insulation system (see also Clause 5) . 40 8.5.1 General . 40 8.5.2 Preparatory work . 40

40、8.5.3 Installation of the thermal insulation materials . 40 8.5.4 Cladding 41 8.5.5 Field (site work) circuit insulation resistance test . 41 8.5.6 Visual inspection . 41 8.5.7 Documentation 42 8.6 Installation of distribution wiring and coordination with branch circuits 42 8.6.1 General . 42 8.6.2

41、Earth-fault protective device 42 BS EN 60079-30-2:2017 4 IEC/IEEE 60079-30-2:2015 IEC/IEEE 2015 8.6.3 Circuit protective device 42 8.6.4 Tagging/Identification 42 8.7 Commissioning . 42 8.7.1 Pre-commissioning check 42 8.7.2 Functional check and final documentation 43 9 Maintenance 44 9.1 General .

42、44 9.2 Fault location 44 9.3 Fault rectification 44 10 Repairs 45 10.1 General . 45 10.2 Practicability of repair to electric trace heaters 45 10.2.1 Mechanical damage . 45 10.2.2 Damage due to corrosion . 45 10.2.3 Damage due to overheating . 45 10.3 Repair techniques for electrical trace heaters .

43、 45 10.3.1 General . 45 10.3.2 In-line splice 46 10.3.3 Connection via junction box . 46 10.4 Earthing 46 10.5 Testing . 46 Annex A (informative) Example of design data record 47 Annex B (informative) Checklist for installation requirements . 48 Annex C (informative) Example of trace heater commissi

44、oning record . 50 Annex D (informative) Example of maintenance schedule and log record . 52 Annex E (informative) Pipe heat loss considerations Heat loss formula and example calculations . 54 Annex F (informative) Vessel heat loss considerations . 60 F.1 General . 60 F.2 Insulation heat loss (Qins)

45、. 60 F.3 Slab surface areas (Qslab) 61 F.4 Support heat loss (Qsupt) . 61 F.5 Manhole heat loss (Qmanhole) 62 F.6 Convection coefficient formulae 62 F.6.1 General . 62 F.6.2 Free convection, nonfluid surface, any orientation (hi, hco, ho) 62 F.6.3 Forced convection, any orientation (h0) . 63 F.6.4 R

46、adiation component, all coefficients (hf, hi, hco, ho) . 63 Annex G (informative) Heat up and cool down considerations 65 G.1 Heat up . 65 G.2 Cool down . 66 Annex H (informative) Method to determine equivalent thicknesses of insulating cements 68 Bibliography 69 Figure 1 Thermal insulation Weather-

47、barrier installation 15 Figure 2 Typical temperature profile . 16 BS EN 60079-30-2:2017IEC/IEEE 60079-30-2:2015 5 IEC/IEEE 2015 Figure 3 Flow pattern analysis example . 24 Figure 4 Bypass example . 25 Figure 5 Typical installation of control sensor and sensor for temperature limiting control 38 Figu

48、re 6 Limiting device sensor on sheath of trace heater 38 Figure 7 Limiting device sensor as artificial hot spot 39 Figure E.1 Assumed temperature gradients . 55 Table 1 Pre-installation checks 32 Table A.1 Example of design data record . 47 Table B.1 Example of pre-commissioning check and trace heat

49、er installation record 48 Table C.1 Example of trace heater commissioning record 50 Table D.1 Example of maintenance schedule and log record 52 BS EN 60079-30-2:2017 6 IEC/IEEE 60079-30-2:2015 IEC/IEEE 2015 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ EXPLOSIVE ATMOSPHERES Part 30-2: Electrical resistance trace heating Application guide for design, installation and maintenance FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standard