EN 60974-7:2013

SLOVENSKI STANDARD
01-julij-2013
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SIST EN 60974-7:2005
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Arc welding equipment - Part 7:Torches
Lichtbogenschweißeinrichtungen -- Teil 7: Brenner
Matériel de soudage à l'arc - Partie 7: Torches
Ta slovenski standard je istoveten z: EN 60974-7:2013
ICS:
25.160.30 Varilna oprema Welding equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 60974-7
NORME EUROPÉENNE
May 2013
EUROPÄISCHE NORM
ICS 25.160 Supersedes EN 60974-7:2005

English version
Arc welding equipment -
Part 7:Torches
(IEC 60974-7:2013)
Matériel de soudage à l'arc -  Lichtbogenschweißeinrichtungen -
Partie 7: Torches Teil 7: Brenner
(CEI 60974-7:2013) (IEC 60974-7:2013)

This European Standard was approved by CENELEC on 2013-02-28. 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

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 60974-7:2013 E
Foreword
The text of document 26/492/FDIS, future edition 3 of IEC 60974-7, prepared by IEC/TC 26 "Electric
welding" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
(dop) 2013-11-28
• 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) 2016-02-28
standards conflicting with the
document have to be withdrawn
This document supersedes EN 60974-7:2005.

EN 60974-7:2005:
- new requirement for degree of protection of torch coupling device (see Table 1);
- scope is extended to cable-hose assembly connected between a power source and ancillary
equipment (see Clause 1);
- torch parts, as recommended by the manufacturer, are included in the safe plasma cutting system
design (see 7.4.2);
- new flammability requirement for handle material (see 11.3).

This standard shall be used in conjunction with EN 60974-1:2012.

In this standard, the following print types are used:
- conformity statements: in italic type.

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.
This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment
Designed for Use within Certain Voltage Limits (LVD - 2006/95/EC).

Endorsement notice
The text of the International Standard IEC 60974-7:2013 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated :

IEC 60974-2 NOTE Harmonised as EN 60974-2.

- 3 - EN 60974-7:2013
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 60050 Series International Electrotechnical Vocabulary - -

IEC 60529 - Degrees of protection provided by EN 60529 -
enclosures (IP Code)
IEC 60664-1 - Insulation coordination for equipment within EN 60664-1 -
low-voltage systems -
Part 1: Principles, requirements and tests

IEC 60695-11-10 - Fire hazard testing - EN 60695-11-10 -
Part 11-10: Test flames - 50 W horizontal
and vertical flame test methods

IEC 60974-1 2012 Arc welding equipment - EN 60974-1 2012
Part 1: Welding power sources
IEC 60974-7 ®
Edition 3.0 2013-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Arc welding equipment –
Part 7: Torches
Matériel de soudage à l'arc –
Partie 7: Torches
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX U
ICS 25.160 ISBN 978-2-83220-573-0

– 2 – 60974-7  IEC:2013
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Environmental conditions . 9
5 Classification . 9
5.1 General . 9
5.2 Process . 9
5.3 Guidance . 9
5.4 Cooling . 9
5.5 Main arc striking for plasma processes . 10
6 Test conditions . 10
6.1 General . 10
6.2 Type tests . 10
6.3 Routine tests . 10
7 Protection against electric shock . 10
7.1 Voltage rating . 10
7.2 Insulation resistance . 11
7.3 Dielectric strength . 12
7.3.1 General requirement . 12
7.3.2 Additional requirements for plasma cutting torches . 12
7.3.3 Additional requirements for striking and stabilizing voltage rating . 12
7.4 Protection against electric shock in normal service (direct contact) . 13
7.4.1 Degree of protection requirements . 13
7.4.2 Additional requirements for plasma cutting torches . 13
8 Thermal rating . 13
8.1 General . 13
8.2 Temperature rise . 13
8.3 Heating test . 14
8.3.1 General . 14
8.3.2 Metal inert/active gas (MIG/MAG) or self-shielded flux-cored arc
welding torch . 14
8.3.3 Tungsten inert gas (TIG) and plasma arc welding torch . 16
8.3.4 Plasma cutting torch . 17
8.3.5 Submerged arc welding torch . 18
9 Pressure of the liquid cooling system . 18
10 Resistance to hot objects . 18
11 Mechanical provisions . 19
11.1 Impact resistance . 19
11.2 Accessible parts . 20
11.3 Handle material . 20
12 Marking . 20
13 Instructions for use . 21
Annex A (informative) Additional terminology . 22
Annex B (normative) Position of the welding torches for the heating test. 25

60974-7  IEC:2013 – 3 –
Annex C (informative) Cooled copper block . 26
Annex D (informative) Copper block with a hole . 27
Annex E (informative) Copper bars with a slot . 28
Bibliography . 29

Figure 1 – Device for testing the resistance to hot objects . 19
Figure 2 – Device for the impact test . 20
Figure A.1 – Torch for metal inert/active gas (MIG/MAG) or self-shielded flux-cored arc
welding . 23
Figure A.2 – Gun for metal inert/active gas (MIG/MAG) or self-shielded flux-cored arc
welding . 23
Figure A.3 – Torch for tungsten inert gas arc welding . 23
Figure A.4 – Torch for plasma arc welding . 23
Figure A.5 – Torch for plasma cutting . 23
Figure A.6 – Supply unit . 23
Figure A.7 – Mechanically guided plasma torch . 24
Figure B.1 – MIG/MAG torches . 25
Figure B.2 – TIG torches . 25
Figure B.3 – Plasma welding torches . 25
Figure C.1 – Water-cooled copper block – Example . 26
Figure D.1 – Water-cooled copper block with a hole – Example . 27
Figure E.1 – Water-cooled copper bars with a
...