EN 60079-30-2:2007
(Main)Explosive atmospheres - Part 30-2: Electrical resistance trace heating - Application guide for design, installation and maintenance
Explosive atmospheres - Part 30-2: Electrical resistance trace heating - Application guide for design, installation and maintenance
This part of IEC 60079 provides guidance for the application of electrical resistance trace heating systems in areas where explosive gas atmospheres may be present, with the exception of those classified as zone 0. It provides recommendations for the design, installation, maintenance and repair of trace heating equipment and associated control and monitoring equipment. It does not cover devices that operate by induction heating, skin effect heating or direct pipeline heating, nor those intended for stress relieving.
Explosionsfähige Atmosphäre - Teil 30-2: Elektrische Widerstands-Begleitheizungen - Anwendungsleitfaden für Entwurf, Installation und Instandhaltung
Atmosphères explosives - Partie 30-2: Traçage par résistance électrique - Guide d'application pour la conception, l'installation et la maintenance
La présente partie de la CEI 60079 fournit des lignes directrices pour l'application des systèmes de traçage par résistance électrique dans les emplacements où l'on peut rencontrer des atmosphères explosives, à l'exception de celles classées zone 0. Elle fournit des recommandations pour la conception, l'installation et la maintenance du matériel de traçage et du matériel associé de commande et de surveillance. Elle ne couvre pas les dispositifs qui fonctionnent par chauffage par induction, chauffage à effet de peau ou chauffage par impédance, ni ceux destinés à la libération de contraintes.
Eksplozivne atmosfere - 30-2. del: Električni uporovni grelni trakovi - Vodilo za zasnovo, inštalacijo in vzdrževanje (IEC 60079-30-2:2007)
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Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2007
1DGRPHãþD
SIST EN 62086-2:2005
(NVSOR]LYQHDWPRVIHUHGHO (OHNWULþQLXSRURYQLJUHOQLWUDNRYL9RGLOR]D
]DVQRYRLQãWDODFLMRLQY]GUåHYDQMH ,(&
Explosive atmospheres - Part 30-2: Electrical resistance trace heating - Application guide
for design, installation and maintenance
Explosionsfähige Atmosphäre - Teil 30-2: Elektrische Widerstands-Begleitheizungen -
Anwendungsleitfaden für Entwurf, Installation und Instandhaltung
Atmospheres explosives - Partie 30-2: Traçage par résistance électrique - Guide
d'application pour la conception, l'installation et la maintenance
Ta slovenski standard je istoveten z: EN 60079-30-2:2007
ICS:
29.260.20 (OHNWULþQLDSDUDWL]D Electrical apparatus for
HNVSOR]LYQDR]UDþMD explosive atmospheres
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 60079-30-2
NORME EUROPÉENNE
April 2007
EUROPÄISCHE NORM
ICS 29.260.20 Supersedes EN 62086-2:2005
English version
Explosive atmospheres -
Part 30-2: Electrical resistance trace heating -
Application guide for design, installation and maintenance
(IEC 60079-30-2:2007)
Atmosphères explosives - Explosionsfähige Atmosphäre -
Partie 30-2: Traçage Teil 30-2: Elektrische
par résistance électrique - Widerstands-Begleitheizungen -
Guide d'application pour la conception, Anwendungsleitfaden für Entwurf,
l'installation et la maintenance Installation und Instandhaltung
(CEI 60079-30-2:2007) (IEC 60079-30-2:2007)
This European Standard was approved by CENELEC on 2007-03-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60079-30-2:2007 E
Foreword
The text of document 31/662/FDIS, future edition 1 of IEC 60079-30-2, prepared by IEC TC 31,
Equipment for explosive atmospheres, was submitted to the IEC-CENELEC parallel vote and was
approved by CENELEC as EN 60079-30-2 on 2007-03-01.
This European Standard supersedes EN 62086-2:2005.
The general revisions and updating to produce EN 60079-30-2:2007 are a result of national comments
received.
The main technical differences apart from the general revision and updating of EN 62086-2:2005 are as
follows:
– corrections;
– extensive revision and additions for design and installation recommendations.
This standard is to be used in conjunction with EN 60079-30-1:2007, Explosive atmospheres – Part 30-1:
Electrical resistance trace heating – General and testing requirements.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2007-12-01
– latest date by which the national standards conflicting
(dow) 2010-03-01
with the EN have to be withdrawn
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60079-30-2:2007 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 60079-30-2:2007
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application of this document. 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 60079-0 (mod) 2004 Electrical apparatus for explosive gas EN 60079-0 2006
atmospheres -
Part 0: General requirements
IEC 60079-1 2003 Electrical apparatus for explosive gas EN 60079-1 2004
atmospheres - + corr. April 2006
Part 1: Flameproof enclosures "d"
1)
IEC 60079-7 2001 Electrical apparatus for explosive gas EN 60079-7 2003
atmospheres -
Part 7: Increased safety "e"
IEC 60079-10 2002 Electrical apparatus for explosive gas EN 60079-10 2003
atmospheres -
Part 10: Classification of hazardous areas
2)
IEC 60079-14 1996 Electrical apparatus for explosive gas EN 60079-14 1997
atmospheres -
Part 14: Electrical installations in hazardous
areas (other than mines)
3)
IEC 60079-17 1996 Electrical apparatus for explosive gas EN 60079-17 1997
atmospheres -
Part 17: Inspection and maintenance of
electrical installations in hazardous areas
(other than mines)
IEC 60079-30-1 2007 Explosive atmospheres - EN 60079-30-1 2007
Part 30-1: Electrical resistance trace heating -
General and testing requirements
1)
EN 60079-7 is superseded by EN 60079-7:2007, which is based on IEC 60079-7:2006.
2)
EN 60079-14 is superseded by EN 60079-14:2003, which is based on IEC 60079-14:2002.
3)
EN 60079-17 is superseded by EN 60079-17:2003, which is based on IEC 60079-17:2002.
NORME CEI
INTERNATIONALE
IEC
60079-30-2
INTERNATIONAL
Première édition
STANDARD
First edition
2007-01
Atmosphères explosives –
Partie 30-2:
Traçage par résistance électrique –
Guide d’application pour la conception,
l’installation et la maintenance
Explosive atmospheres –
Part 30-2:
Electrical resistance trace heating –
Application guide for design, installation
and maintenance
© IEC 2007 Droits de reproduction réservés ⎯ Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
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électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
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CODE PRIX
XA
PRICE CODE
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International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue
60079-30-2 © IEC:2007 – 3 –
CONTENTS
FOREWORD.7
1 Scope.11
2 Normative references .11
3 Terms and definitions .13
4 Application considerations.13
4.1 General .13
4.2 Corrosive areas.13
4.3 Process temperature accuracy .15
4.4 Installation considerations .15
5 Thermal insulation .17
5.1 General .17
5.2 Selection of insulating material.17
5.3 Selection of weather barrier (cladding) .19
5.4 Selection of economical thickness .21
5.5 Double insulation.23
6 System design.27
6.1 Introduction .27
6.2 Purpose of, and major requirement for, trace heating .27
6.3 Heat loss calculations.27
6.4 Heat-up considerations.31
6.5 Heat-loss design safety factor .33
6.6 Selection of trace heater .33
6.7 Maximum temperature determination.41
6.8 Design information .47
6.9 Power system.49
6.10 Start-up at low ambient temperatures .51
6.11 Long trace heater runs .51
6.12 Flow pattern analysis.51
6.13 Dead-leg control technique.55
6.14 Chimney effect .55
7 Control and monitoring .55
7.1 General .55
7.2 Mechanical controllers.55
7.3 Electronic controllers.57
7.4 Application suitability.57
7.5 Location of controllers .57
7.6 Location of sensors .57
7.7 Alarm considerations.59
8 Recommendations for installation .63
8.1 Introduction .63
8.2 Preparatory work.63
8.3 Installation of trace heating circuits .65
60079-30-2 © IEC:2007 – 5 –
8.4 Installation of control and monitoring equipment.77
8.5 Installation of thermal insulation system (see also Clause 5) .87
8.6 Installation of distribution wiring and coordination with branch circuits.91
8.7 Commissioning.93
9 Maintenance.95
9.1 General .95
9.2 Fault location .95
9.3 Fault rectification.97
10 Repairs .97
10.1 General .97
10.2 Practicability of repair to electric trace heaters .97
10.3 Repair techniques for electrical trace heaters.99
10.4 Earthing .99
10.5 Testing .
...
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