Electrical resistance trace heating systems for industrial and commercial applications - Part 2: Application guide for system design, installation and maintenance

IEC/TS 62395-2:2008 provides detailed recommendations for the system design, installation, maintenance and repair of electrical resistance trace heating systems in industrial and commercial applications. Pertains to trace heating systems that may comprise either factory constructed or field (work-site) assembled units, and which may be series heater cables, parallel heater cables, heater pads or heater panels that have been assembled and/or terminated in accordance with the manufacturer's instructions for connection to voltage supplies up to and including 450 V/750 V.

Elektrische Widerstands-Begleitheizungen für industrielle und gewerbliche Zwecke - Teil 2: Anwendungsleitfaden für Systemauslegung, 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

Status
Published
Publication Date
05-Dec-2013
Current Stage
6060 - Document made available
Due Date
06-Dec-2013
Completion Date
06-Dec-2013

RELATIONS

Buy Standard

Standard
EN 62395-2:2014 - BARVE na PDF-strani 28,29,79,82
English language
89 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day

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.

---------------------- Page: 1 ----------------------
SIST EN 62395-2:2014
---------------------- Page: 2 ----------------------
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
---------------------- Page: 3 ----------------------
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).

---------------------- Page: 4 ----------------------
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
---------------------- Page: 5 ----------------------
SIST EN 62395-2:2014
---------------------- Page: 6 ----------------------
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
---------------------- Page: 7 ----------------------
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

---------------------- Page: 8 ----------------------
SIST EN 62395-2:2014
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

---------------------- Page: 9 ----------------------
SIST EN 62395-2:2014
– 4 – 62395-2 © IEC:2013

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

---------------------- Page: 10 ----------------------
SIST EN 62395-2:2014
62395-2 © 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

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
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.