《07-30164535-DC.pdf》由会员分享，可在线阅读，更多相关《07-30164535-DC.pdf（21页珍藏版）》请在三一文库上搜索。
1、a Date: 5 April 2007 Origin: European Latest date for receipt of comments: 30 June 2007 Project no.: 2007/00868 Responsible committee: WEE/6 Electric arc welding equipment Interested committees: Title: Draft BS EN 60974-8 Arc welding equipment Part 8: Gas consoles for welding and plasma cutting syst
2、ems Supersession information: If this document is published as a standard, the UK implementation of it will supersede BSEN60974-8 : 2004 and partially supersede NONE . If you are aware of a current national standard which may be affected, please notify the secretary (contact details below). WARNING:
3、 THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 30 June 2007. This draft is issued to allow comments from interested parties; all comments will be given consideration prior to publication. No acknowledgement will normally be sent. See overlea
4、f for information on commenting. No copying is allowed, in any form, without prior written permission from BSI except as permitted under the Copyright, Designs and Patent Act 1988 or for circulation within a nominating organization for briefing purposes. Electronic circulation is limited to dissemin
5、ation by e-mail within such an organization by committee members. Further copies of this draft may be purchased from BSI Customer Services, Tel: +44(0) 20 8996 9001 or email ordersbsi-. British, International and foreign standards are also available from BSI Customer Services. British Standards on C
6、D or Online are available from British Standards Publishing Sales Limited. Tel: 01344 404409 or email bsonlinetechindex.co.uk. Information on the co-operating organizations represented on the committees referenced above may be obtained from the responsible committee secretary. Cross-references The B
7、ritish Standards which implement International or European publications referred to in this draft may be found via the British Standards Online Service on the BSI web site http:/www.bsi-. Direct tel: 020 8996 7009 Responsible Committee Secretary: Committee Service Centre (BSI) E-mail: cscbsi- Draft
8、for Public Comment Head Office 389 Chiswick High Road London W4 4AL Telephone: +44(0)20 8996 9000 Fax: +44(0)20 8996 7001 Form 36 Version 7.0 DPC: 07/30164535 DC Licensed Copy: London South Bank University, London South Bank University, Mon May 07 12:31:39 GMT+00:00 2007, Uncontrolled Copy, (c) BSI
9、b Introduction This draft standard is based on European discussions in which the UK took an active part. Your comments on this draft are welcome and will assist in the preparation of the consequent British Standard. If no comments are received to the contrary, then the UK will approve this draft and
10、 implement it as a British Standard. Comment is particularly welcome on national legislative or similar deviations that may be necessary. Even if this draft standard is not approved by the UK, if it receives the necessary support in Europe, the UK will be obliged to publish the official English Lang
11、uage text unchanged as a British Standard and to withdraw any conflicting standard. UK Vote Please indicate whether you consider the UK should submit a negative (with reasons) or positive vote on this draft. Submission The guidance given below is intended to ensure that all comments receive efficien
12、t and appropriate attention by the responsible BSI committee. Annotated drafts are not acceptable and will be rejected. All comments must be submitted, preferably electronically, to the Responsible Committee Secretary at the address given on the front cover. Comments should be compatible with Versio
13、n 6.0 or Version 97 of Microsoft Word for Windows, if possible; otherwise comments in ASCII text format are acceptable. Any comments not submitted electronically should still adhere to these format requirements. All comments submitted should be presented as given in the example below. Further inform
14、ation on submitting comments and how to obtain a blank electronic version of a comment form are available from the BSI web site at: http:/www.bsi- Template for comments and secretariat observations Date: xx/xx/200x Document: ISO/DIS xxxxx 1 2 (3) 4 5 (6) (7) MB Clause No./ Subclause No./ Annex (e.g.
15、 3.1) Paragraph/ Figure/Table/ Note (e.g. Table 1) Type of com- ment Comment (justification for change) by the MB Proposed change by the MB Secretariat observations on each comment submitted 3.1 Definition 1 ed Definition is ambiguous and needs clarifying. Amend to read . so that the mains connector
16、 to which no connection . 6.4 Paragraph 2 te The use of the UV photometer as an alternative cannot be supported as serious problems have been encountered in its use in the UK. Delete reference to UV photometer. Microsoft and MS-DOS are registered trademarks, and Windows is a trademark of Microsoft C
17、orporation. Licensed Copy: London South Bank University, London South Bank University, Mon May 07 12:31:39 GMT+00:00 2007, Uncontrolled Copy, (c) BSI FORM CD (IEC) 2002-08-08 26/352/CD COMMITTEE DRAFT (CD) IEC/TC or SC: TC 26 Project number IEC 60974-8 ed.2 Title of TC/SC: Electric welding Date of c
18、irculation 2007-03-30 Closing date for comments 2007-07-06 Also of interest to the following committees Supersedes document 26/351/MCR Functions concerned: Safety EMC Environment Quality assurance Secretary: Eckhard Brgger THIS DOCUMENT IS STILL UNDER STUDY AND SUBJECT TO CHANGE. IT SHOULD NOT BE US
19、ED FOR REFERENCE PURPOSES. RECIPIENTS OF THIS DOCUMENT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION. Title: IEC 60974-8 Ed.2: Arc welding equipment - Part 8: Gas consoles for welding and plasma
20、cutting systems (Titre) : Consoles de gaz pour soudage et systmes de coupage plasma Introductory note Copyright 2007 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this electronic file, to make a copy and to print out the content for the sole purpose
21、 of preparing National Committee positions. You may not copy or “mirror“ the file or printed version of the document, or any part of it, for any other purpose without permission in writing from IEC. Licensed Copy: London South Bank University, London South Bank University, Mon May 07 12:31:39 GMT+00
22、:00 2007, Uncontrolled Copy, (c) BSI Draft IEC 60974-8 ed.2 IEC 26/352/CD 2 CONTENTS FOREWORD.4 1 Scope.6 2 Normative references .6 3 Terms and definitions .6 4 Environmental conditions7 5 Tests7 5.1 Test conditions7 5.2 Measuring instruments 7 5.3 Conformity of components.7 5.4 Type tests .7 5.5 Ro
23、utine tests.7 5.5.1 External gas console .7 5.5.2 Internal gas console 7 6 Components.8 7 Protection against electric shock 8 7.1 Insulation 8 7.2 Protection against electric shock in normal service (direct contact) .8 7.2.1 Protection provided by the enclosure.8 7.2.2 Capacitors.8 7.3 Protection ag
24、ainst electric shock in case of a fault condition (indirect contact) 9 8 Thermal requirements.9 8.1 Heating test.9 8.2 Maximum temperature.9 9 Connections for plasma cutting torches 9 10 Mechanical requirements9 10.1 Protection against fire or explosion9 10.2 Gas line purging9 10.3 Enclosure10 10.3.
25、1 Design requirements10 10.3.2 Enclosure purging10 10.3.3 Safe design of gas console10 10.3.4 Open structure.11 10.4 External gas console .11 10.5 Internal gas console 11 11 Gas lines11 11.1 Gas hoses and tubing11 11.2 Gas fittings12 11.3 Leak test .12 12 Control circuits .12 13 Rating plate13 13.1
26、External gas console .13 13.2 Internal gas console 13 14 Instructions and markings.13 14.1 Instructions .13 Licensed Copy: London South Bank University, London South Bank University, Mon May 07 12:31:39 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Draft IEC 60974-8 ed.2 IEC 3 26/352/CD 14.2 Marking .1
27、4 Annex A (informative) Mechanized plasma system diagram .15 Annex B (informative) Electrical apparatus for gas consoles (potential explosion)16 Annex C (informative) Example of a rating plate 18 Bibliography19 Figure A.1 Example of a mechanized plasma system.15 Figure B.1 Example for an internal ga
28、s console .17 Figure C.1 Principle of a rating plate18 Table 1 Colour coding and marking12 Licensed Copy: London South Bank University, London South Bank University, Mon May 07 12:31:39 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Draft IEC 60974-8 ed.2 IEC 4 26/352/CD INTERNATIONAL ELECTROTECHNICAL C
29、OMMISSION _ 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 I
30、EC 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
31、) 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 wit
32、h 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 ne
33、arly 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 th
34、at 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 Committe
35、es 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 proc
36、edure 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 age
37、nts 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,
38、 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
39、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 conjuncti
40、on with IEC 60974-1. The significant changes with respect to the previous edition are the following: Removal of intrinsically safe design; Induced changes due to publication of IEC 60974-1 edition 3. The text of this standard is based on the following documents: FDIS Report on voting 26/XXX/FDIS 26/
41、XXX/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. Licensed Copy: London South Bank University, London South Bank University,
42、Mon May 07 12:31:39 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Draft IEC 60974-8 ed.2 IEC 5 26/352/CD The committee has decided that the contents of this publication will remain unchanged until 2006. At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition, or amen
43、ded. Licensed Copy: London South Bank University, London South Bank University, Mon May 07 12:31:39 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Draft IEC 60974-8 ed.2 IEC 6 26/352/CD ARC WELDING EQUIPMENT Part 8: Gas consoles for welding and plasma cutting systems 1 Scope This part of IEC 60974 speci
44、fies 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 inter
45、nal to the power source enclosure. In the latter case, this standard also applies to the power source. 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 l
46、atest edition of the referenced document (including any amendments) applies. IEC 60050-151, International Electrotechnical Vocabulary (IEV) 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: Weld
47、ing power sources 3 Terms and definitions For the purposes of this document, definitions contained in IEC 60050-151, IEC 60974-1, and the following terms and definitions apply. 3.1 gas console device for routing gases to a torch where all electrical apparatus for direct gas-flow control (for example
48、, solenoid valves, metering valves, etc.) and gases are contained in the same enclosure, separate enclosure, or no enclosure 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 11 3.3 upper explosion
49、 limit (UEL) concentration of flammable gas or vapour in air, above which the gas atmosphere is not explosive IEV 426-02-10, modified 1 Figures in square brackets refer to the bibliography. Licensed Copy: London South Bank University, London South Bank University, Mon May 07 12:31:39 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Draft IEC 60974-8 ed.2 IEC 7 26/352/CD 3.4 external gas consol