EN ISO 17637-2011 6250 Non-destructive testing of welds - Visual testing of fusion-welded joints《焊接的无损测试 熔焊节点的目测检查》.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 17637:2011Non-destructive testing ofwelds Visual testing offusion-welded joints (ISO17637:2003)Copyright European Committee for Standardization Provided by IHS under li

2、cense with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 17637:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO17637:2011. It is identical to ISO 17637:2003. It supersedes BS EN970:1997 which is withdrawn

3、.The UK participation in its preparation was entrusted to TechnicalCommittee WEE/46, Non-destructive testing.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users

4、are responsible for its correctapplication. BSI 2011ISBN 978 0 580 72104 5ICS 25.160.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 March 2011.Amendments iss

5、ued since publicationDate Text affectedCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 17637 March 2011 ICS 25.160.40 Sup

6、ersedes EN 970:1997English Version Non-destructive testing of welds - Visual testing of fusion-welded joints (ISO 17637:2003) Contrle non destructif des assemblages souds - Contrle visuel des assemblages souds par fusion (ISO 17637:2003) Zerstrungsfreie Prfung von Schweiverbindungen - Sichtprfung vo

7、n Schmelzschweiverbindungen (ISO 17637:2003) This European Standard was approved by CEN on 13 February 2011. CEN 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 altera

8、tion. 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 CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made

9、by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia

10、, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPIS

11、CHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 17637:2011: ECopyright European Committee for Standardization Provided by IHS under license with

12、CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 17637:2011EN ISO 17637:2011 (E) 3 Foreword The text of ISO 17637:2003 has been prepared by Technical Committee ISO/TC 44 “Welding and allied processes” of the International Organization for Standardizatio

13、n (ISO) and has been taken over as EN ISO 17637:2011 by Technical Committee CEN/TC 121 “Welding” the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September

14、2011, and conflicting national standards shall be withdrawn at the latest by September 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent r

15、ights. This document supersedes EN 970:1997. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Franc

16、e, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 17637:2003 has been approved by CEN as a EN ISO 17637:

17、2011 without any modification. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 17637:2011ISO 17637:2003(E) ISO 2003 All rights reserved iiiContents Page Foreword iv 1 S

18、cope 1 2 Test conditions and equipment. 1 3 Personnel qualification. 1 4 Visual testing. 2 4.1 General. 2 4.2 Visual testing of joint preparation. 2 4.3 Visual testing during welding 2 4.4 Visual testing of the finished weld 2 4.5 Visual testing of repaired welds 3 5 Test records. 4 Annex A (informa

19、tive) Examples of testing equipment 5 Bibliography . 10 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 17637:2011ISO 17637:2003(E) iv ISO 2003 All rights reservedForew

20、ord ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a techni

21、cal committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of e

22、lectrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to

23、the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for i

24、dentifying any or all such patent rights. ISO 17637 was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee SC 5, Testing and inspection of welds. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or

25、 networking permitted without license from IHS-,-,-BS EN ISO 17637:2011INTERNATIONAL STANDARD ISO 17637:2003(E) ISO 2003 All rights reserved 1Non-destructive testing of welds Visual testing of fusion-welded joints 1 Scope This International Standard covers the visual testing of fusion welds in metal

26、lic materials. It may also be applied to visual testing of the joint prior to welding. 2 Test conditions and equipment The illuminance at the surface shall be a minimum of 350 lx. However, 500 lx is recommended. For direct inspection, the access shall be sufficient to place the eye within 600 mm of

27、the surface to be examined and at an angle not less than 30 (see Figure 1). a Range Figure 1 Access for testing Remote inspection using mirrors, boroscopes, fibre optic cables or cameras shall be considered when the access for testing in accordance with Figure 1 is not possible or when specified by

28、an application standard. An additional light source can be used to increase the contrast and relief between imperfections and the background. Where the result of visual testing is inconclusive, the visual test should be supplemented by other non-destructive testing methods for surface inspections. E

29、xamples of equipment used for visual testing are given in Annex A. 3 Personnel qualification Visual testing of welds and the evaluation of results for final acceptance shall be performed by qualified and capable personnel. It is recommended that personnel be qualified in accordance with ISO 9712 or

30、an equivalent standard at an appropriate level in the relevant industry sector. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 17637:2011ISO 17637:2003(E) 2 ISO 2003 A

31、ll rights reserved4 Visual testing 4.1 General This International Standard does not define the extent of visual testing. However, this should be determined in advance, e.g., by reference to an application or product standard. The examiner shall have access to the necessary inspection and production

32、documentation required. Any visual testing prior to, during or after completion of the weld should be carried out while physical access is still possible. This may include the visual testing of surface treatments. 4.2 Visual testing of joint preparation When visual testing is required prior to weldi

33、ng, the joint shall be examined to check that: a) the shape and dimensions of the weld preparation meet the requirements of the welding procedure specification; b) the fusion faces and adjacent surfaces are clean and any required surface treatment has been carried out in accordance with the applicat

34、ion or product standard; c) the parts to be welded are correctly fixed in relation to each other according to drawings or instructions. 4.3 Visual testing during welding When required, the weld shall be tested during the welding process to check that: a) each run or layer of weld metal is cleaned be

35、fore it is covered by a further run, particular attention being paid to the junctions between the weld metal and the fusion face; b) there are no visible imperfections, e.g. cracks or cavities; if imperfections are observed, they shall be reported so that remedial action can be taken before the depo

36、sition of further weld metal; c) the transition between the runs and between the weld and the parent metal is so formed that satisfactory melting can be accomplished when welding the next run; d) the depth and shape of gouging is in accordance with the WPS or compared with the original groove shape

37、in order to assure complete removal of the weld metal as specified; e) after any necessary repairs/remedial action, the weld conforms to the original requirements of the WPS. 4.4 Visual testing of the finished weld 4.4.1 General The finished weld shall be examined to determine whether it meets the r

38、equirements of the application or product standard or other agreed acceptance criteria, e.g. ISO 5817 or ISO 10042. Finished welds shall at least be examined in accordance with the requirements given in 4.4.2 to 4.4.5. 4.4.2 Cleaning and dressing The weld shall be examined to check that: a) all slag

39、 has been removed by manual or mechanical means in order to avoid imperfections being obscured; Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 17637:2011ISO 17637:2003

40、(E) ISO 2003 All rights reserved 3b) there are no tool impressions or blow marks; c) when weld dressing is required, overheating of the joint due to grinding is avoided and that grinding marks and an uneven finish are also avoided; d) for fillet welds and butt welds to be dressed flush, the joint me

41、rges smoothly with the parent metal without under flushing. If imperfections (caused by dressing or otherwise) are observed, they shall be reported so that remedial action can be taken. 4.4.3 Profile and dimensions The weld shall be examined to check that: a) the profile of the weld face and the hei

42、ght of any excess weld metal meet the requirements of the acceptance standard (see 4.4.1); b) the surface of the weld is regular: the pattern and the pitch of weave marks present an even and satisfactory visual appearance; the distance between the last layer and the parent metal or the position of r

43、uns has been measured where required by the WPS; c) the weld width is consistent over the whole of the joint and that it meets the requirements given in the weld drawing or acceptance standard (see 4.4.1); in the case of butt welds, the weld preparation shall be checked to ensure that it has been co

44、mpletely filled. 4.4.4 Weld root and surfaces The visually accessible parts of the weld, i.e. the weld root for a single-sided butt weld and the weld surfaces, shall be examined for deviations from the acceptance standard (see 4.4.1). The weld shall be examined to check that: a) in the case of singl

45、e-sided butt welds, the penetration, root concavity and any burn-through or shrinkage grooves are within the limits specified in the acceptance standard over the whole of the joint; b) any undercut is within the requirements of the acceptance standard; c) any imperfections such as cracks or porosity

46、, detected using optical aids when necessary, in the weld surface or heat affected zones comply with the appropriate acceptance criteria; d) any attachments temporarily welded to the object to facilitate production or assembly and which are prejudicial to the function of the object or the ability to

47、 examine it are removed so that the object is not damaged; the area where the attachment was fixed shall be checked to ensure freedom of cracks; e) any arc strikes are within the limits of the acceptance standard. 4.4.5 Post-weld heat treatment Further testing may be required after post-weld heat tr

48、eatment. 4.5 Visual testing of repaired welds 4.5.1 General When welds fail to comply wholly or in part with the acceptance criteria and repair is necessary, the welded joint shall be examined in accordance with 4.5.2 and 4.5.3 prior to re-welding. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 17637:2011ISO 17637:2003(E) 4 ISO 2003 All rights reservedEvery repaired weld shall be re-examined to the same requirements as the original weld. 4.5.2 Partial