SIST EN 62395-2:2014
(Main)Electrical resistance trace heating systems for industrial and commercial applications - Part 2: Application guide for system design, installation and maintenance
Electrical resistance trace heating systems for industrial and commercial applications - Part 2: Application guide for system design, installation and maintenance
This part of IEC 62395 provides detailed recommendations for the system design, installation, maintenance and repair of electrical resistance trace heating systems in industrial and commercial applications. This standard does not include or provide for any applications in potentially explosive atmospheres. This standard pertains to trace heating systems that may comprise either factory fabricated or field-assembled (work-site) units, and which may be series or parallel trace heaters, or surface heaters (heater pads or heater panels) that have been assembled and/or terminated
in accordance with the manufacturer’s instructions. The products covered by this standard are intended to be installed by persons who are suitably trained in the techniques required and that only trained personnel carry out especially critical work, such as the installation of connections and terminations. Installations are intended to be carried out under the supervision of a qualified person who has undergone supplementary training in electric trace heating systems. This standard does not cover induction, impedance or skin effect heating. Trace heating systems can be grouped into different types of installations. These are characterized by different requirements for testing and are usually certified for a specific type of installation or application. Typical applications for the different types of installation are as follows:
a) Installations of trace heating on pipes, vessels and associated equipment. Applications include:
– freeze protection and temperature maintenance;
– hot water lines;
– oil and chemical lines;
– sprinkler systems.
b) Outdoor exposed area installations of trace heating. Applications include:
– roof de-icing;
– gutter and downspout de-icing;
– catch basins and drains;
– rail heating.
c) Installation with embedded trace heating. Applications include:
– snow melting;
– floor warming;
– frost heave prevention;
– underground thermal energy storage systems;
– door frames.
– d) Installations of trace heating internal to conduit or piping. Applications include:
– snow melting – in conduit;
– floor warming – in conduit;
– frost heave prevention – in conduit;
– underground thermal energy storage systems – in conduit;
– internal trace heating of potable water lines;
– enclosed drains and culverts.
Elektrische Begleitheizungen (Trace- Widerstandsheizungen) für industrielle und gewerbliche Zwecke - Teil 2: Anwendungsleitfaden für Systementwurf, Installation und Wartung
Systèmes de traçage par résistance électrique pour applications industrielles et commerciales - Partie 2: Guide d'application pour la conception, l'installation et la maintenance du système
La CEI/TS 62395-2:2008 fournit des recommandations détaillées pour la conception, l'installation, la maintenance et la réparation des systèmes de traçage par résistance électrique dans les applications industrielles et commerciales. Traite des systèmes de traçage qui peuvent comprendre aussi bien des unités assemblées sur site (site d'exploitation) que des unités fabriquées en usine et qui peuvent être des câbles de traçage en série, des câbles de traçage en parallèle, des bandes ou des panneaux de traçage qui ont été assemblés et/ou équipés de terminaisons conformément aux instructions du fabricant pour le raccordement aux alimentations de tensions inférieures ou égales à 450 V/750 V.
Industrijski in komercialni sistemi električnih uporovnih grelnih trakov - 2. del: Vodilo za načrtovanje sistema, namestitev in vzdrževanje (IEC 62395-2:2013)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 62395-2:2014
01-februar-2014
1DGRPHãþD
SIST-TS CLC/TS 62395-2:2011
,QGXVWULMVNLLQNRPHUFLDOQLVLVWHPLHOHNWULþQLKXSRURYQLKJUHOQLKWUDNRYGHO
9RGLOR]DQDþUWRYDQMHVLVWHPDQDPHVWLWHYLQY]GUåHYDQMH ,(&
Electrical resistance trace heating systems for industrial and commercial applications -
Part 2: Application guide for system design, installation and maintenance
Elektrische Begleitheizungen (Trace- Widerstandsheizungen) für industrielle und
gewerbliche Zwecke - Teil 2: Anwendungsleitfaden für Systementwurf, Installation und
Wartung
Systèmes de traçage par résistance électrique pour applications industrielles et
commerciales - Partie 2: Guide d'application pour la conception, l'installation et la
maintenance du système
Ta slovenski standard je istoveten z: EN 62395-2:2013
ICS:
25.180.10 (OHNWULþQHSHþL Electric furnaces
SIST EN 62395-2:2014 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 62395-2:2014
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SIST EN 62395-2:2014
EUROPEAN STANDARD
EN 62395-2
NORME EUROPÉENNE
December 2013
EUROPÄISCHE NORM
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 62395-2:2013)
Systèmes de traçage par résistance Elektrische Widerstands-Begleitheizungen
électrique pour applications industrielles für industrielle und gewerbliche Zwecke -
et commerciales - Teil 2: Anwendungsleitfaden für
Partie 2: Guide d'application pour la Systementwurf, Installation und Wartung
conception, l'installation et la maintenance (IEC 62395-2:2013)
du système
(CEI 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 of 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, German). 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, Belgium, 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, Switzerland, Turkey and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für 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 reserved worldwide for CENELEC members.
Ref. No. EN 62395-2:2013 E
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SIST EN 62395-2:2014
EN 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
approved by CENELEC as EN 62395-2:2013.
The following dates are fixed:
(dop) 2014-07-14
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2016-10-14
standards conflicting with the
document have to be withdrawn
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 for 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
showers 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 62395-2:2013 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 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/A1:2003 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).
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SIST EN 62395-2:2014
- 3 - EN 62395-2:2013
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 dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
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 - EN 60519-1 -
Part 1: General requirements
IEC 62395-1 2013 Electrical resistance trace heating systems for EN 62395-1 2013
industrial and commercial applications -
Part 1: General and testing requirements
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SIST EN 62395-2:2014
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SIST EN 62395-2:2014
IEC 62395-2
®
Edition 1.0 2013-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electrical resistance trace heating systems for industrial and commercial
applications –
Part 2: Application guide for system design, installation and maintenance
Systèmes de traçage par résistance électrique pour applications industrielles et
commerciales –
Partie 2: Guide d’application pour la conception, l’installation et la maintenance
du système
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XC
ICS 25.180.10 ISBN 978-2-8322-1082-6
Warning! Make sure that you obtained this publication from an authorized distributor.
Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN 62395-2:2014
– 2 – 62395-2 © IEC:2013
CONTENTS
FOREWORD . 7
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 11
3 Terms and definitions . 11
4 Surface heating of vessels and piping systems . 11
4.1 Application description . 11
4.1.1 General . 11
4.1.2 Environmental conditions . 11
4.1.3 Trace heating systems considerations . 12
4.2 Design information – General . 12
4.2.1 General . 12
4.2.2 Electrical system design . 12
4.2.3 Control and monitoring . 12
4.2.4 Trace heating system design . 13
4.2.5 Design information documentation . 13
4.3 Thermal system design . 14
4.3.1 General . 14
4.3.2 Design conditions . 14
4.3.3 Thermal insulation . 15
4.3.4 Heat loss determination . 19
4.3.5 Design safety factor . 20
4.3.6 Heat-up considerations . 20
4.3.7 Selection of trace heater . 21
4.3.8 Design calculations. 23
4.3.9 Theoretical sheath temperature calculations – Metallic pipe
applications . 24
4.3.10 Theoretical sheath temperature calculations – Non-metallic pipe
applications . 25
4.3.11 Design documentation . 26
4.3.12 Start-up at low ambient temperatures . 26
4.3.13 Long trace heater circuits . 27
4.3.14 Chimney effect . 27
4.4 Electrical design . 27
4.5 Control and monitoring system design . 27
4.5.1 General . 27
4.5.2 Mechanical controllers . 28
4.5.3 Electronic controllers . 28
4.5.4 Application suitability . 28
4.5.5 Location of controllers . 29
4.5.6 Location of sensors . 29
4.5.7 Alarm considerations . 30
4.5.8 Integrated control . 31
4.5.9 Flow pattern analysis . 31
4.5.10 Dead-leg control technique . 33
4.6 Special design considerations . 33
4.6.1 General . 33
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62395-2 © IEC:2013 – 3 –
4.6.2 Freeze protection systems . 33
4.6.3 Sprinkler systems, fire suppression . 33
4.6.4 Hot water services/tempered water . 35
4.6.5 Safety shower design requirements . 36
4.6.6 Specialty lines . 36
4.7 Installation. 38
4.7.1 General . 38
4.7.2 Personnel aspects . 38
4.7.3 Preparatory work . 38
4.7.4 Preliminary installation of trace heating circuits . 39
4.7.5 Insulation resistance test . 39
4.7.6 Installation of trace heater systems . 39
4.7.7 Installation of control and monitoring equipment . 42
4.7.8 Necessary modifications . 43
4.7.9 Installation of the thermal insulation system. 43
4.7.10 Installation of electrical power . 44
4.7.11 Commissioning . 45
4.8 Maintenance . 46
4.8.1 General . 46
4.8.2 Training of maintenance personnel . 46
4.8.3 Frequency of inspection . 46
4.8.4 Maintenance program documentation . 46
4.8.5 Visual evaluation . 47
4.8.6 Electrical evaluation . 47
4.8.7 Review of the electrical protection system . 47
4.9 Repair . 48
4.9.1 General . 48
4.9.2 Fault location . 48
4.9.3 Practicability of repair to electric trace heaters . 48
4.9.4 Repair techniques for electrical trace heaters . 49
5 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
5.7 Installation. 51
5.7.1 General . 51
5.7.2 Trace heaters and component mounting . 52
5.8 Maintenance . 55
5.9 Repair . 55
6 Rail heating . 55
6.1 Application description . 55
6.1.1 General . 55
6.1.2 Switch point heating . 56
6.1.3 Contact/live rail heating . 56
6.1.4 Track heating . 56
6.1.5 Catenary/pantograph shoe heating . 56
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6.2 Design information . 57
6.2.1 General . 57
6.2.2 Weather data . 57
6.2.3 Rail system description . 57
6.2.4 System design . 57
6.3 Thermal design . 57
6.3.1 Heating load determination . 57
6.3.2 Typical heating load . 58
6.4 Electrical design . 58
6.5 Control and monitoring system design . 58
6.6 Special design considerations . 58
6.6.1 Electrical considerations . 58
6.6.2 Finite element analysis . 59
6.7 Installation. 59
6.7.1 General . 59
6.7.2 Point heating . 60
6.7.3 Swing nose crossing . 60
6.7.4 Clamp lock heating . 61
6.7.5 Contact/live rail heating and track heating . 61
6.7.6 Catenary/pantograph shoe heating . 62
6.8 Maintenance . 62
6.9 Repair . 62
7 Snow melting . 62
7.1 Application description . 62
7.2 Design information . 63
7.2.1 General . 63
7.2.2 Weather data . 63
7.2.3 Construction details of workpiece . 63
7.2.4 Electrical considerations . 63
7.2.5 System performance level . 63
7.2.6 Trace heater layout and component mounting. 64
7.3 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 warming. 70
8.1 Application description . 70
8.2 Design information . 70
8.2.1 General . 70
8.2.2 Environmental data . 70
8.2.3 Construction details of workpiece . 70
8.2.4 Electrical considerations . 70
8.2.5 Trace heater layout and component mounting. 71
8.3 Thermal design – Heat load determination . 72
8.4 Electrical design . 73
8.5 Control and monitoring system design . 73
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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
9.2.1 General . 75
9.2.2 Construction details of the floor . 75
9.2.3 Electrical considerations . 75
9.3 Heat load determination . 75
9.3.1 General . 75
9.3.2 Trace heater layout and component mounting. 77
9.4 Electrical design . 77
9.5 Control and monitoring system design . 77
9.5.1 Control options . 77
9.5.2 Monitoring . 77
9.6 Special 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
10.2.1 General . 79
10.2.2 Environmental data . 79
10.2.3 Construction details of building . 79
10.2.4 Electrical considerations . 79
10.2.5 Trace heater layout and component mounting. 79
10.3 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
10.7.1 General . 81
10.7.2 Installation in sand . 81
10.7.3 Installation in concrete . 81
10.8 Maintenance . 82
10.9 Repair . 82
Annex A (informative) Pre-installation checks
...
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