EN ISO 17640-2017 en Non-destructive testing of welds - Ultrasonic testing - Techniques testing levels and assessment.pdf

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1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Non-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and assessment (ISO 17640:2017)BS EN ISO 17640:2017National forewordThis British Standard is the UK implementation of EN ISO 17640:2017

2、. It supersedes BS EN ISO 17640:2010, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee WEE/46, Non-destructive testing.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to

3、 include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2017 Published by BSI Standards Limited 2017ISBN 978 0 580 93002 7ICS 25.160.40Compliance with a British Standard cannot confer immunity from legal obligations.Th

4、is British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 December 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN ISO 17640:2017EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 17640November 2017ICS 25.

5、160.40 Supersedes EN ISO 17640:2010EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN Ref. No. EN ISO 17640:2017: EAll rights of exploitation in any form and by any means reserved

6、 worldwide for CEN national MembersNon-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and assessment (ISO 17640:2017)Contrle non destructif des assemblages souds - Contrle par ultrasons - Techniques, niveaux dessai et valuation (ISO 17640:2017)Zerstrungsfreie Prfung

7、von Schweiverbindungen - Ultraschallprfung - Techniken, Prfklassen und Bewertung (ISO 17640:2017)This European Standard was approved by CEN on 19 September 2017.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard

8、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 CEN member.This European Standard exists in three official versions (English, Fre

9、nch, German). A version in any other language made 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,

10、 Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

11、 Turkey and United Kingdom.English VersionEN ISO 17640:2017 (E)European forewordThis document (EN ISO 17640:2017) has been prepared by Technical Committee ISO/TC 44 “Welding and allied processes” in collaboration with Technical Committee CEN/TC 121 “Welding and allied processes” the secretariat of w

12、hich 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 May 2018, and conflicting national standards shall be withdrawn at the latest by May 2018.Attention is drawn to the possibility

13、that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.This document supersedes EN ISO 17640:2010.According to the CEN-CENELEC Internal Regulations, the national standards organizations of the fo

14、llowing countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands

15、, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.Endorsement noticeThe text of ISO 17640:2017 has been approved by CEN as EN ISO 17640:2017 without any modification.2BS EN ISO 17640:2017ISO 17640:2017(E)Foreword iv1 Scope . 12

16、 Normative references 13 Terms and definitions . 24 Symbols 25 Principle 36 Information required prior to testing 36.1 Items to be specified 36.2 Specific information required before testing 36.3 Written test procedure . 47 Requirements for personnel and equipment . 47.1 Personnel qualifications . 4

17、7.2 Test equipment . 47.3 Probe parameters . 47.3.1 Test frequency 47.3.2 Angles of incidence 47.3.3 Element size . 57.3.4 Adaptation of probes to curved scanning surfaces 57.3.5 Coupling media . 58 Testing volume 59 Preparation of scanning surfaces . 610 Parent metal testing 611 Range and sensitivi

18、ty setting . 711.1 General . 711.2 Reference for sensitivity setting 811.3 Evaluation levels 911.4 Transfer correction . 911.5 Signal-to-noise ratio . 912 Testing levels 913 Testing techniques .1013.1 General 1013.2 Manual scan path . 1013.3 Testing for imperfections perpendicular to the testing sur

19、face 1013.4 Location of discontinuities 1013.5 Evaluation of indications . 1013.5.1 General. 1013.5.2 Maximum echo amplitude 1013.5.3 Discontinuity length.1113.5.4 Discontinuity height .1113.5.5 Characterization of discontinuities .1114 Test report 11Annex A (normative) Testing levels for various ty

20、pes of welded joints 13Bbliography .30 ISO 2017 All rights reserved iiiContents PageBS EN ISO 17640:2017ISO 17640:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International St

21、andards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also

22、 take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In

23、 particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements

24、 of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (s

25、ee www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well a

26、s information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.This document was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee SC 5, Testing and

27、inspection of welds. This third edition cancels and replaces the second edition (ISO 17640:2010), which has been technically revised.Requests for official interpretations of any aspect of this document should be directed to the Secretariat of ISO/TC 44/SC 5 via your national standards body. A comple

28、te listing of these bodies can be found at www.iso.org. iv ISO 2017 All rights reservedBS EN ISO 17640:2017Non-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and assessment1 ScopeThis document specifies techniques for the manual ultrasonic testing of fusion-welded jo

29、ints in metallic materials of thickness 8 mm which exhibit low ultrasonic attenuation (especially that due to scatter) at object temperatures from 0 C to 60 C. It is primarily intended for use on full penetration welded joints where both the welded and parent material are ferritic.Where material-dep

30、endent ultrasonic values are specified in this document, they are based on steels having an ultrasonic sound velocity of (5 920 50) m/s for longitudinal waves and (3 255 30) m/s for transverse waves.This document specifies four testing levels, each corresponding to a different probability of detecti

31、on of imperfections. Guidance on the selection of testing levels A, B, and C is given in Annex A.This document specifies that the requirements of testing level D, which is intended for special applications, be in accordance with general requirements. Testing level D can only be used when defined by

32、specification. This includes tests of metals other than ferritic steel, tests on partial penetration welds, tests with automated equipment, and tests at object temperatures outside the range 0 C to 60 C.This document can be used for the assessment of discontinuities, for acceptance purposes, by eith

33、er of the following techniques:a) evaluation based primarily on length and echo amplitude of the discontinuity;b) evaluation based on characterization and sizing of the discontinuity by probe movement techniques.2 Normative referencesThe following documents are referred to in the text in such a way

34、that some or all of their content constitutes requirements 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.ISO 5577, Non-destructive testing Ultrasonic testing VocabularyI

35、SO 9712, Non-destructive testing Qualification and certification of NDT personnelISO 11666:2010, Non-destructive testing of welds Ultrasonic testing Acceptance levelsISO 16810, Non-destructive testing Ultrasonic testing General principlesISO 16811, Non-destructive testing Ultrasonic testing Sensitiv

36、ity and range settingISO 16826, Non-destructive testing Ultrasonic testing Examination for discontinuities perpendicular to the surfaceISO 17635, Non-destructive testing of welds General rules for metallic materialsISO 23279, Non-destructive testing of welds Ultrasonic testing Characterization of di

37、scontinuities in weldsEN 12668 (all parts), Non-destructive testing Characterization and verification of ultrasonic examination equipmentINTERNATIONAL STANDARD ISO 17640:2017(E) ISO 2017 All rights reserved 1BS EN ISO 17640:2017ISO 17640:2017(E)3 Terms and definitionsFor the purposes of this documen

38、t, the terms and definitions given in ISO 5577 and ISO 17635 apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp 4 Symbol

39、sSymbol Definition UnitAL acceptance level DDSRdiameter of the disk-shaped reflector (flat-bottom hole) mmh extension of the discontinuity in depth direction mml length of the discontinuity mmlxprojected length of the discontinuity in the x-direction mmlyprojected length of the discontinuity in the

40、y-direction mmp full skip distance mmt thickness of parent materialammx position of the discontinuity in the longitudinal direction mmy position of the discontinuity in the transverse direction mmz position of the discontinuity in the depth direction mmaIf the joined parts are not of equal thickness

41、, t represents the smallest thickness.Indications shall be considered to be originating from either longitudinal or transverse discontinuities, depending on the direction of their major dimension with respect to the weld axis, x, in accordance with Figure 1.lh lxhl xylyz 1YZXKey1 originNOTE For defi

42、nitions of h, l, lx, ly, x, y, z, see table above.Figure 1 Coordinate system for defining the location of discontinuities2 ISO 2017 All rights reservedBS EN ISO 17640:2017ISO 17640:2017(E)5 PrincipleThe purpose of this document is to describe general techniques of ultrasonic weld testing, using stan

43、dard criteria, for the most commonly used welded joints at object temperatures in the range 0 C to 60 C. The specific requirements of this document cover the test equipment, preparation, performance of testing, and reporting. The parameters specified, in particular those for the probes, are compatib

44、le with the requirements of ISO 11666 and ISO 23279.If the joined parts are not of equal thickness, the smallest thickness shall be considered.The techniques used shall be specified.6 Information required prior to testing6.1 Items to be specifiedThese include:a) method for setting the reference leve

45、l;b) method to be used for the evaluation of discontinuities;c) acceptance levels;d) testing level;e) manufacturing and operation stage(s) at which the testing is to be carried out;f) qualification of personnel;g) extent of the testing for transverse discontinuities;h) requirements for additional ta

46、ndem testing (according to ISO 16826);i) parent metal testing prior to and/or after welding;j) whether or not a written test procedure is required;k) requirements for written test procedures.6.2 Specific information required before testingBefore any testing of a welded joint can begin, the operator

47、shall have access to the following essential information:a) written test procedure, if required (see 6.3);b) type(s) of parent material and product form (i.e. cast, forged, rolled);c) manufacturing or operation stage at which testing is to be made, including heat treatment, if any;d) time and extent

48、 of any post-weld heat treatment;e) joint preparation and dimensions;f) requirements for surface conditions;g) welding procedure or relevant information on the welding process;h) reporting requirements;i) acceptance levels; ISO 2017 All rights reserved 3BS EN ISO 17640:2017ISO 17640:2017(E)j) extent

49、 of testing, including requirements for transverse discontinuities, if relevant;k) testing level;l) personnel qualification level;m) procedures for corrective actions when unacceptable discontinuities are revealed.6.3 Written test procedureThe definitions and requirements in this document normally satisfy the need for a written test procedure.Where this is not the case, or where the techniques described in this document are not applicable to the weld joint to be tested, additional written test procedures shal