BS EN 62395-2-2013 Electrical resistance trace heating systems for industrial and commercial applications Application guide for system design installation and maintenance《工业和商业用电阻式.pdf

1、BSI Standards PublicationElectrical resistance trace heating systems for industrial and commercial applicationsPart 2: Application guide for system design, installation and maintenanceBS EN 62395-2:2013National forewordThis British Standard is the UK implementation of EN 62395-2:2013. It isidentical

2、 to IEC 62395-2:2013. It supersedes DD CLC/TS 62395-2:2010 whichis withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PEL/27, Electroheating.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not p

3、urport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2013.Published by BSI Standards Limited 2013ISBN 978 0 580 77528 4ICS 25.180.10Compliance with a British Standard cannot confer immunity fromlegal obligat

4、ions.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 December 2013.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 62395-2:2013EUROPEAN STANDARD EN 62395-2 NORME EUROPENNE EUROPISCHE NORM December 2013

5、CENELEC 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 2013 CENELEC - All rights of exploitation in any form and by any means r

6、eserved worldwide for CENELEC members. Ref. No. EN 62395-2:2013 E ICS 25.180.10 Supersedes CLC/TS 62395-2:2010 English version Electrical resistance trace heating systems for industrial and commercial applications - Part 2: Application guide for system design, installation and maintenance (IEC 62395

7、-2:2013) Systmes de traage par rsistance lectrique pour applications industrielles et commerciales - Partie 2: Guide dapplication pour la conception, linstallation et la maintenance du systme (CEI 62395-2:2013) Elektrische Widerstands-Begleitheizungen fr industrielle und gewerbliche Zwecke - Teil 2:

8、 Anwendungsleitfaden fr Systementwurf, Installation und Wartung (IEC 62395-2:2013) This European Standard was approved by CENELEC on 2013-10-14. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status o

9、f a national standard without any alteration. 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, Ge

10、rman). A version in any other language 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, Belgi

11、um, Bulgaria, Croatia, Cyprus, the Czech 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, Slovakia, Slovenia, Spain, Sweden,

12、 Switzerland, Turkey and the United Kingdom. BS EN 62395-2:2013EN 62395-2:2013 - 2 - Foreword The text of document 27/927/FDIS, future edition 1 of IEC 62395-2, prepared by IEC/TC 27 “Industrial electroheating and electromagnetic processing“ was submitted to the IEC-CENELEC parallel vote and approve

13、d by CENELEC as EN 62395-2:2013. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2014-07-14 latest date by which the national standards conflicting with the document have

14、 to be withdrawn (dow) 2016-10-14 This document supersedes CLC/TS 62395-2:2010. EN 62395-2:2013 includes the following significant technical changes with respect to CLC/TS 62395-2:2010: - this document has been changed from a Technical Specification to a European Standard; - design considerations fo

15、r trace heating on sprinkler systems have been expanded and a figure has been added to illustrate how to avoid undue shadowing of spray patterns from insulated sprigs close to sprinkler heads; - specific details of design considerations for trace heating for emergency eyewash units and safety shower

16、s have been added. Attention is drawn to the possibility that some of the elements of this document may be the subject 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 62395

17、-2:2013 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60079-30-1:2007 NOTE Harmonized as EN 60079-30-1:2007 (not modified). IEC 60079-30-2:2007 NOTE Harmonized

18、as EN 60079-30-2:2007 (not modified). IEC 60335-2-83:2001 NOTE Harmonized as EN 60335-2-83:2002 (not modified). IEC 60335-2-83:2001/A1:2008 NOTE Harmonized as EN 60335-2-83:2002/A1:2008 (not modified). IEC 60335-2-96:2002 NOTE Harmonized as EN 60335-2-96:2002 (not modified). IEC 60335-2-96:2002/A1:2

19、003 NOTE Harmonized as EN 60335-2-96:2002/A1:2004 (not modified). IEC 60335-2-96:2002/A2:2008 NOTE Harmonized as EN 60335-2-96:2002/A2:2009 (not modified). BS EN 62395-2:2013- 3 - EN 62395-2:2013 Annex ZA (normative) Normative references to international publications with their corresponding Europea

20、n publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) a

21、pplies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60519-1 - Safety in electroheating installations - Part 1: General requirements EN 60519-1 - IEC 62395-1 2013 Electrical res

22、istance trace heating systems for industrial and commercial applications - Part 1: General and testing requirements EN 62395-1 2013 BS EN 62395-2:2013 2 62395-2 IEC:2013 CONTENTS INTRODUCTION . 9 1 Scope . 10 2 Normative references . 11 3 Terms and definitions . 11 4 Surface heating of vessels and p

23、iping systems . 11 4.1 Application description 11 General . 11 4.1.1Environmental conditions . 11 4.1.2Trace heating systems considerations . 12 4.1.34.2 Design information General 12 General . 12 4.2.1Electrical system design 12 4.2.2Control and monitoring 12 4.2.3Trace heating system design . 13 4

24、.2.4Design information documentation . 13 4.2.54.3 Thermal system design 14 General . 14 4.3.1Design conditions 14 4.3.2Thermal insulation . 15 4.3.3Heat loss determination . 19 4.3.4Design safety factor . 20 4.3.5Heat-up considerations 20 4.3.6Selection of trace heater 21 4.3.7Design calculations 2

25、3 4.3.8Theoretical sheath temperature calculations Metallic pipe 4.3.9applications . 24 Theoretical sheath temperature calculations Non-metallic pipe 4.3.10applications . 25 Design documentation . 26 4.3.11Start-up at low ambient temperatures 26 4.3.12Long trace heater circuits 27 4.3.13Chimney effe

26、ct 27 4.3.144.4 Electrical design 27 4.5 Control and monitoring system design . 27 General . 27 4.5.1Mechanical controllers . 28 4.5.2Electronic controllers . 28 4.5.3Application suitability . 28 4.5.4Location of controllers . 29 4.5.5Location of sensors . 29 4.5.6Alarm considerations . 30 4.5.7Inte

27、grated control 31 4.5.8Flow pattern analysis . 31 4.5.9Dead-leg control technique 33 4.5.104.6 Special design considerations . 33 General . 33 4.6.1BS EN 62395-2:201362395-2 IEC:2013 3 Freeze protection systems . 33 4.6.2Sprinkler systems, fire suppression . 33 4.6.3Hot water services/tempered water

28、 35 4.6.4Safety shower design requirements . 36 4.6.5Specialty lines . 36 4.6.64.7 Installation. 38 General . 38 4.7.1Personnel aspects . 38 4.7.2Preparatory work . 38 4.7.3Preliminary installation of trace heating circuits . 39 4.7.4Insulation resistance test . 39 4.7.5Installation of trace heater

29、systems . 39 4.7.6Installation of control and monitoring equipment 42 4.7.7Necessary modifications 43 4.7.8Installation of the thermal insulation system. 43 4.7.9Installation of electrical power . 44 4.7.10Commissioning 45 4.7.114.8 Maintenance 46 General . 46 4.8.1Training of maintenance personnel

30、46 4.8.2Frequency of inspection . 46 4.8.3Maintenance program documentation 46 4.8.4Visual evaluation . 47 4.8.5Electrical evaluation 47 4.8.6Review of the electrical protection system . 47 4.8.74.9 Repair . 48 General . 48 4.9.1Fault location . 48 4.9.2Practicability of repair to electric trace hea

31、ters 48 4.9.3Repair techniques for electrical trace heaters 49 4.9.45 Roof and gutter de-icing . 49 5.1 Application description 49 5.2 Design information General 50 5.3 Thermal design . 51 5.4 Electrical design 51 5.5 Control and monitoring system design . 51 5.6 Special design considerations . 51 5

32、.7 Installation. 51 General . 51 5.7.1Trace heaters and component mounting 52 5.7.25.8 Maintenance 55 5.9 Repair . 55 6 Rail heating 55 6.1 Application description 55 General . 55 6.1.1Switch point heating 56 6.1.2Contact/live rail heating . 56 6.1.3Track heating 56 6.1.4Catenary/pantograph shoe hea

33、ting 56 6.1.5BS EN 62395-2:2013 4 62395-2 IEC:2013 6.2 Design information 57 General . 57 6.2.1Weather data . 57 6.2.2Rail system description 57 6.2.3System design . 57 6.2.46.3 Thermal design . 57 Heating load determination 57 6.3.1Typical heating load 58 6.3.26.4 Electrical design 58 6.5 Control a

34、nd monitoring system design . 58 6.6 Special design considerations . 58 Electrical considerations 58 6.6.1Finite element analysis 59 6.6.26.7 Installation. 59 General . 59 6.7.1Point heating . 60 6.7.2Swing nose crossing 60 6.7.3Clamp lock heating 61 6.7.4Contact/live rail heating and track heating

35、. 61 6.7.5Catenary/pantograph shoe heating 62 6.7.66.8 Maintenance 62 6.9 Repair . 62 7 Snow melting 62 7.1 Application description 62 7.2 Design information 63 General . 63 7.2.1Weather data . 63 7.2.2Construction details of workpiece 63 7.2.3Electrical considerations 63 7.2.4System performance lev

36、el . 63 7.2.5Trace heater layout and component mounting 64 7.2.67.3 Thermal design Power output (heat load) determination . 68 7.4 Electrical design 68 7.5 Control and monitoring system design . 68 7.6 Special design considerations . 68 7.7 Installation. 69 7.8 Maintenance 69 7.9 Repair . 70 8 Floor

37、 warming. 70 8.1 Application description 70 8.2 Design information 70 General . 70 8.2.1Environmental data 70 8.2.2Construction details of workpiece 70 8.2.3Electrical considerations 70 8.2.4Trace heater layout and component mounting 71 8.2.58.3 Thermal design Heat load determination . 72 8.4 Electr

38、ical design 73 8.5 Control and monitoring system design . 73 BS EN 62395-2:201362395-2 IEC:2013 5 8.6 Special design consideration . 73 8.7 Installation. 74 8.8 Maintenance 74 8.9 Repair . 74 9 Frost heave prevention . 74 9.1 Application description 74 9.2 Design information 75 General . 75 9.2.1Con

39、struction details of the floor . 75 9.2.2Electrical considerations 75 9.2.39.3 Heat load determination 75 General . 75 9.3.1Trace heater layout and component mounting 77 9.3.29.4 Electrical design 77 9.5 Control and monitoring system design . 77 Control options 77 9.5.1Monitoring . 77 9.5.29.6 Speci

40、al design considerations . 77 9.7 Installation. 78 9.8 Maintenance 78 9.9 Repair . 78 10 Underground thermal energy storage systems 78 10.1 Application description 78 10.2 Design information 79 General . 79 10.2.1Environmental data 79 10.2.2Construction details of building 79 10.2.3Electrical consid

41、erations 79 10.2.4Trace heater layout and component mounting 79 10.2.510.3 Thermal design Heat-loss determination . 80 10.4 Electrical design 80 10.5 Control and monitoring system design . 81 10.6 Special design considerations when trace heaters are located in sand layer 81 10.7 Installation. 81 Gen

42、eral . 81 10.7.1Installation in sand 81 10.7.2Installation in concrete . 81 10.7.310.8 Maintenance 82 10.9 Repair . 82 Annex A (informative) Pre-installation checks 83 Annex B (informative) Trace heater commissioning record . 84 Annex C (informative) Maintenance schedule and log record . 85 Bibliogr

43、aphy 86 Figure 1 Thermal insulation Weather-barrier installation 17 Figure 2 Typical temperature profile . 18 Figure 3 Equilibrium conditions for workpiece maintenance 22 Figure 4 Equilibrium conditions for upper limit evaluation . 23 BS EN 62395-2:2013 6 62395-2 IEC:2013 Figure 5 Heated tank exampl

44、e . 32 Figure 6 Bypass example . 32 Figure 7 Fire sprinkler sprig: tapered thermal insulation . 35 Figure 8 Double containment system . 37 Figure 9 Gravity flow piping systems 38 Figure 10 Ice dam formation 50 Figure 11 Downspout to underground drain 50 Figure 12 Roof and gutter trace heater arrange

45、ment 52 Figure 13 Gutter detail . 53 Figure 14 Typical roof mounting methods . 54 Figure 15 Drain detail for flat roof 55 Figure 16 Typical positioning of point trace heater on stock rail and switch rail 60 Figure 17 Typical positioning of trace heater on swing nose crossing . 60 Figure 18 Typical c

46、lamp lock trace heater 61 Figure 19 Typical positioning of trace heater on steel and aluminium clad contact rails 61 Figure 20 Typical positioning of trace heater in pantograph shoe . 62 Figure 21 Snow melting trace heater embedded in concrete 65 Figure 22 Snow melting trace heater located in condui

47、t . 66 Figure 23 Expansion joint detail . 67 Figure 24 Snow melting junction box location . 67 Figure 25 Typical floor warming trace heater mounting 72 Figure 26 Typical floor heating power requirements . 73 Figure 27 Typical frost heave prevention substructure . 75 Figure 28 Frost heave prevention

48、power requirements . 76 Figure 29 Typical underground thermal energy storage system installation 80 Table 1 Application types . 13 Table 2 Recommendations for monitoring and control Type II and III control . 29 Table 3 Recommendations for hot water services and tempered water temperatures . 35 Table

49、 4 Typical snow melting heat loads 64 BS EN 62395-2:201362395-2 IEC:2013 9 INTRODUCTION IEC 62395-1 provides the essential requirements and testing appropriate to electrical resistance trace heating equipment used in industrial and commercial applications. While some of this work already exists in national or international standards, this standard has collated much of this existing work and added considerably to it. IEC 62395-2 provides detaile