Arc welding equipment - Part 8: Gas consoles for welding and plasma cutting systems

IEC 60974-8:2009 specifies safety and performance requirements for gas consoles intended to be used with combustible gases or oxygen. These gas consoles are designed to supply gases for use in arc welding, plasma cutting, gouging and allied processes in non-explosive atmospheres. The significant changes with respect to the previous edition are the following: - removal of intrinsically safe design; - introduction of gas mixing function; - new informative rating plate layout; - induced changes due to publication of IEC 60974-1, edition 3.

Lichtbogenschweißeinrichtungen - Teil 8: Gaskonsolen für Schweiß- und Plasmaschneidsysteme

Matériel de soudage à l'arc - Partie 8: Consoles de gaz pour soudage et systèmes de coupage plasma

La CEI 60974-8:2009 spécifie les exigences de performance et de sécurité concernant les consoles de gaz destinées à être utilisées avec des gaz combustibles ou de l'oxygène. Ces consoles de gaz sont conçues pour fournir du gaz au soudage à l'arc, au coupage plasma, au gougeage et aux procédés connexes dans des atmosphères non explosives. Les modifications significatives par rapport à l'édition antérieure sont les suivantes: - retrait de la conception de sécurité intrinsèque; - introduction de la fonction mélange du gaz; - nouvelle disposition informative de la plaque signalétique; - modifications induites par la publication de l'édition 3 de la CEI 60974-1.

Oprema za obločno varjenje - 8. del: Plinske konzole za varilne in plazemske rezalne sisteme (IEC 60974-8:2009)

General Information

Status
Published
Publication Date
17-Mar-2009
Technical Committee
Drafting Committee
Parallel Committee
Current Stage
6060 - Document made available
Due Date
18-Mar-2009
Completion Date
18-Mar-2009

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Standards Content (sample)

SLOVENSKI STANDARD
SIST EN 60974-8:2009
01-september-2009
1DGRPHãþD
SIST EN 60974-8:2004
2SUHPD]DREORþQRYDUMHQMHGHO3OLQVNHNRQ]ROH]DYDULOQHLQSOD]HPVNH
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Arc welding equipment -- Part 8: Gas consoles for welding and plasma cutting systems

Lichtbogenschweißeinrichtungen -- Teil 8: Gaskonsolen für Schweiß- und
Plasmaschneidsysteme

Matériel de soudage à l'arc -- Partie 8: Consoles de gaz pour soudage et systèmes de

coupage plasma
Ta slovenski standard je istoveten z: EN 60974-8:2009
ICS:
25.160.30 Varilna oprema Welding equipment
SIST EN 60974-8:2009 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60974-8:2009
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SIST EN 60974-8:2009
EUROPEAN STANDARD
EN 60974-8
NORME EUROPÉENNE
March 2009
EUROPÄISCHE NORM
ICS 25.160 Supersedes EN 60974-8:2004
English version
Arc welding equipment -
Part 8: Gas consoles for welding
and plasma cutting systems
(IEC 60974-8:2009)
Matériel de soudage à l'arc - Lichtbogenschweißeinrichtungen -
Partie 8: Consoles de gaz pour soudage Teil 8: Gaskonsolen für
et systèmes de coupage plasma Schweiß- und Plasmaschneidsysteme
(CEI 60974-8:2009) (IEC 60974-8:2009)

This European Standard was approved by CENELEC on 2009-03-01. 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: avenue Marnix 17, B - 1000 Brussels

© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 60974-8:2009 E
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SIST EN 60974-8:2009
EN 60974-8:2009 - 2 -
Foreword

The text of document 26/381/CDV, future edition 2 of IEC 60974-8, prepared by IEC TC 26, Electric

welding, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as

EN 60974-8 on 2009-03-01.
This European Standard supersedes EN 60974-8:2004.
The significant changes with respect to EN 60974-8:2004 are the following:
– removal of intrinsically safe design;
– introduction of gas mixing function;
– new informative rating plate layout;
– induced changes due to publication of EN 60974-1:2005.
This standard is to be used in conjunction with EN 60974-1.
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) 2009-12-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2012-03-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice

The text of the International Standard IEC 60974-8:2009 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 60204-1 NOTE Harmonized as EN 60204-1:2006 (modified).
IEC 60664-1 NOTE Harmonized as EN 60664-1:2007 (not modified).
IEC 60974-2 NOTE Harmonized as EN 60974-2:2008 (not modified).
IEC 60974-3 NOTE Harmonized as EN 60974-3:2007 (not modified).
IEC 60974-7 NOTE Harmonized as EN 60974-7:2005 (not modified).
IEC 61010-1 NOTE Harmonized as EN 61010-1:2001 (not modified).
__________
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SIST EN 60974-8:2009
- 3 - EN 60974-8:2009
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 60050-151 - International Electrotechnical Vocabulary - -
(IEV) -
Part 151: Electrical and magnetic devices
1) 2)
IEC 60529 - Degrees of protection provided EN 60529 1991
by enclosures (IP Code) + corr. May 1993
IEC 60974-1 2005 Arc welding equipment - EN 60974-1 2005
Part 1: Welding power sources
Undated reference.
Valid edition at date of issue.
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SIST EN 60974-8:2009
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SIST EN 60974-8:2009
IEC 60974-8
Edition 2.0 2009-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Arc welding equipment –
Part 8: Gas consoles for welding and plasma cutting systems
Matériel de soudage à l’arc –
Partie 8: Consoles de gaz pour soudage et systèmes de coupage plasma
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX
ICS 25.160 ISBN 2-8318-1027-7
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN 60974-8:2009
– 2 – 60974-8 © IEC:2009
CONTENTS

FOREWORD...........................................................................................................................4

1 Scope...............................................................................................................................6

2 Normative references .......................................................................................................6

3 Terms and definitions .......................................................................................................6

4 Environmental conditions..................................................................................................7

5 Tests ................................................................................................................................7

5.1 Test conditions........................................................................................................7

5.2 Measuring instruments ............................................................................................7

5.3 Conformity of components.......................................................................................7

5.4 Type tests ...............................................................................................................7

5.5 Routine tests ...........................................................................................................8

5.5.1 External gas console ...................................................................................8

5.5.2 Internal gas console ....................................................................................8

6 Protection against electric shock ......................................................................................8

6.1 Insulation ................................................................................................................8

6.2 Protection against electric shock in normal service (direct contact) .........................8

6.2.1 Protection provided by the enclosure...........................................................8

6.2.2 Capacitors ...................................................................................................8

6.3 Protection against electric shock in case of a fault condition (indirect contact) ........8

7 Thermal requirements.......................................................................................................9

7.1 Heating test.............................................................................................................9

7.2 Maximum temperature.............................................................................................9

8 Connections for plasma cutting torches ............................................................................9

9 Mechanical requirements..................................................................................................9

9.1 Protection against fire or explosion..........................................................................9

9.2 Gas line purging ......................................................................................................9

9.3 Enclosure ..............................................................................................................10

9.3.1 Design requirements..................................................................................10

9.3.2 Enclosure purging......................................................................................10

9.3.3 Safe design of gas console........................................................................11

9.3.4 Open structure...........................................................................................11

9.3.5 Solid filled enclosure .................................................................................11

9.4 External gas console .............................................................................................11

9.5 Internal gas console ..............................................................................................12

10 Gas lines ........................................................................................................................12

10.1 Gas hoses and tubing............................................................................................12

10.2 Gas fittings............................................................................................................12

10.3 Leak test ...............................................................................................................12

11 Control circuits ...............................................................................................................13

12 Rating plate....................................................................................................................13

12.1 External gas console .............................................................................................13

12.2 Internal gas console ..............................................................................................13

13 Instructions and markings...............................................................................................14

13.1 Instructions ...........................................................................................................14

13.2 Marking .................................................................................................................14

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SIST EN 60974-8:2009
60974-8 © IEC:2009 – 3 –

Annex A (informative) Mechanized plasma system diagram .................................................15

Annex B (informative) Example of a rating plate layout ........................................................16

Bibliography..........................................................................................................................17

Figure A.1 – Example of a mechanized plasma system .........................................................15

Figure B.1 – Principle of a rating plate ..................................................................................16

Table 1 – Colour coding and marking....................................................................................12

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SIST EN 60974-8:2009
– 4 – 60974-8 © IEC:2009
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
ARC WELDING EQUIPMENT –
Part 8: Gas consoles for welding and plasma cutting systems
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any

equipment declared to be in conformity with an IEC Publication.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 60974-8 has been prepared by IEC technical committee 26:

Electric welding.
This standard is to be used in conjunction with IEC 60974-1.

This second edition cancels and replaces the first edition published in 2004. This edition

constitutes a technical revision.
The significant changes with respect to the previous edition are the following:
• removal of intrinsically safe design;
• introduction of gas mixing function;
• new informative rating plate layout;
• induced changes due to publication of IEC 60974-1, edition 3.
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SIST EN 60974-8:2009
60974-8 © IEC:2009 – 5 –
The text of this standard is based on the following documents:
CDV Report on voting
26/381/CDV 26/391/RVC

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.
The French version of this standard has not been voted upon.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

The committee has decided that the contents of this publication will remain unchanged until

the maintenance result date indicated on the IEC web site under http://webstore.iec.ch in the

data related to the specific publication. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
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SIST EN 60974-8:2009
– 6 – 60974-8 © IEC:2009
ARC WELDING EQUIPMENT –
Part 8: Gas consoles for welding and plasma cutting systems
1 Scope

This part of IEC 60974 specifies safety and performance requirements for gas consoles

intended to be used with combustible gases or oxygen. These gas consoles are designed to

supply gases for use in arc welding, plasma cutting, gouging and allied processes in non-

explosive atmospheres.

The gas console can be external or internal to the power source enclosure. In the latter case,

this standard also applies to the power source.
NOTE See Annex A for mechanised plasma system diagram.
2 Normative references

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.

IEC 60050-151, International Electrotechnical Vocabulary – Part 151: Electrical and magnetic

devices
IEC 60529, Degrees of protection provided by enclosures (IP Code)
IEC 60974-1:2005, Arc welding equipment − Part 1: Welding power sources
3 Terms and definitions

For the purposes of this document, the following terms and definitions, as well as those of

IEC 60050-151and IEC 60974-1, apply.
3.1
gas console

device for gas-flow routing, mixing or both that contains electrical apparatus in a single or

multiple enclosure, or open structure
3.2
lower explosion limit
LEL

concentration of flammable gas or vapour in air, below which the gas atmosphere is not

explosive
[IEV 426-02-09, modified] [1]
———————
Figures in square brackets refer to the bibliography.
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SIST EN 60974-8:2009
60974-8 © IEC:2009 – 7 –
3.3
lower flammability limit
LFL

minimum concentration of combustible gas in a mixture where a combustion can be ignited by

an ignition sour
...

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