1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Non-destructive testing of weldsUltrasonic testingAcceptance levelsBS EN ISO 11666:2018National forewordThis British Standard is the UK implementation of EN ISO 11666:2018. It is identical to ISO 11666:2018. It supersed
2、es BS EN ISO 11666:2010, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee WEE/46, Non-destructive testing.A list of organizations represented on this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 include all
3、the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 94393 5ICS 25.160.40Compliance with a British Standard cannot confer immunity from legal obligations. This British S
4、tandard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN ISO 11666:2018EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 11666February 2018ICS 25.160.40 Supersed
5、es EN ISO 11666:2010EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2018 CEN Ref. No. EN ISO 11666:2018: EAll rights of exploitation in any form and by any means reserved worldwide for
6、CEN national MembersNon-destructive testing of welds - Ultrasonic testing - Acceptance levels (ISO 11666:2018)Essais non destructifs des assemblages souds - Contrle par ultrasons - Niveaux dacceptation (ISO 11666:2018)Zerstrungsfreie Prfung von Schweiverbindungen - Ultraschallprfung - Zulssigkeitsgr
7、enzen (ISO 11666:2018)This European Standard was approved by CEN on 21 January 2018.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 alteration. Up-to-date lists an
8、d 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 by translation under the r
9、esponsibility 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, Finland, Former Yugoslav
10、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, Turkey and United Kingdom.English VersionEN ISO 11666:2018 (E)European forew
11、ordThis document (EN ISO 11666:2018) 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 which is held by DIN.This European Standard shall be given the status of a n
12、ational standard, either by publication of an identical text or by endorsement, at the latest by August 2018, and conflicting national standards shall be withdrawn at the latest by August 2018.Attention is drawn to the possibility that some of the elements of this document may be the subject of pate
13、nt rights. CEN shall not be held responsible for identifying any or all such patent rights.This document supersedes EN ISO 11666:2010.According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Aust
14、ria, 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, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spai
15、n, Sweden, Switzerland, Turkey and the United Kingdom.Endorsement noticeThe text of ISO 11666:2018 has been approved by CEN as EN ISO 11666:2018 without any modification.2BS EN ISO 11666:2018ISO 11666:2018Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Determination of dis
16、continuity length 25 Sensitivity setting and levels 26 Acceptance levels . 26.1 General . 26.2 Indications from longitudinal discontinuities . 36.3 Indications from transverse discontinuities . 36.4 Grouping of discontinuities 36.5 Length of acceptable discontinuities . 4Annex A (normative) Levels .
17、 6Annex B (normative) Fixed-amplitude level technique .17 ISO 2018 All rights reserved iiiContents PageBS EN ISO 11666:2018ISO 11666:2018ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing
18、International Standards 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 liaiso
19、n with ISO, also 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 Direct
20、ives, Part 1. In 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
21、 of the elements 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 declarat
22、ions received (see 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 asses
23、sment, as well as 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
24、 5, Testing and inspection of welds.This second edition cancels and replaces the first edition (ISO 11666:2010), which has been technically revised.The main changes compared to the previous edition are as follows: this document has been editorially revised; the normative reference to ISO 5817 has be
25、en dated; Clause 5 and 6.5 have been described in more detail.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 complete listing of these bodies can be found at www.iso.org.iv ISO 2018 All
26、rights reservedBS EN ISO 11666:2018Non-destructive testing of weldsUltrasonic testingAcceptance levels1 ScopeThis document specifies two ultrasonic acceptance levels known as acceptance level 2 (AL 2) and acceptance level 3 (AL 3) for full penetration welded joints in ferritic steels, which correspo
27、nd to ISO 5817:2014, quality levels B and C. An acceptance level corresponding to ISO 5817:2014, quality level D is not included in this document, as ultrasonic testing is generally not requested for this weld quality.These acceptance levels are applicable to testing carried out in accordance with I
28、SO 17640.This document applies to the testing of full penetration ferritic steel welds, with thicknesses from 8 mm to 100 mm. It can also be used for other types of welds, materials and thicknesses, provided the tests have been performed with necessary consideration of the geometry and acoustic prop
29、erties of the component, and an adequate sensitivity can be employed to enable the acceptance levels of this document to be applied. The nominal frequency of probes used in this document is between 2 MHz and 5 MHz, unless attenuation or requirements for higher resolution call for other frequencies.
30、It is important to consider the use of these acceptance levels in conjunction with frequencies outside this range carefully.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated r
31、eferences, 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 VocabularyISO 5817:2014, Welding Fusion-welded joints in steel, nickel, titanium and their alloys (
32、beam welding excluded) Quality levels for imperfectionsISO 17635, Non-destructive testing of welds General rules for metallic materialsISO 17640, Non-destructive testing of welds Ultrasonic testing Techniques, testing levels, and assessmentISO 23279, Non-destructive testing of welds Ultrasonic testi
33、ng Characterization of discontinuities in welds3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 5577 apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: ISO Online browsing platform: available at h
34、ttps:/www.iso.org/obp IEC Electropedia: available at http:/www.electropedia.org/INTERNATIONAL STANDARD ISO 11666:2018 ISO 2018 All rights reserved 1BS EN ISO 11666:2018ISO 11666:20184 Determination of discontinuity lengthThe length of a discontinuity shall be determined by measuring the distance alo
35、ng the length over which the echo amplitude is above the evaluation level, using the fixed-amplitude level technique specified in Annex B.5 Sensitivity setting and levelsThe sensitivity setting shall be performed by one of the following techniques. For sensitivity setting and the subsequent testing,
36、 the same technique shall be used.a) Technique 1: based on 3 mm diameter side-drilled holes.b) Technique 2: based on distance-gain-size (DGS) curves for flat-bottomed holes (disk-shaped reflectors).c) Technique 3: using a distance-amplitude-corrected (DAC) curve of a rectangular notch of 1 mm depth
37、and 1 mm width.d) Technique 4: using the tandem technique with reference to a 6 mm diameter flat-bottomed hole (disk-shaped reflector).Four levels as defined in ISO 17640 are to be used:a) reference level;b) acceptance levels (for two quality levels);c) recording levels (recording levels are 4 dB be
38、low the corresponding acceptance levels);d) evaluation level.All levels are linked to the reference reflectors specified in Table A.1.The sensitivity setting techniques and corresponding levels shall be in accordance with Annex A.6 Acceptance levels6.1 GeneralThe relationship between acceptance leve
39、ls, testing levels and quality levels is given in ISO 17635. See also Table 1.Table 1 Ultrasonic pulse-echo technique (UT)Quality level in accordance with ISO 5817:2014 Testing level in accordance with ISO 17640 aAcceptance level in accordance with this documentB At least B 2C At least A 3D At least
40、 A 3baWhen characterization of discontinuities is required, ISO 23279 shall be applied.bUT is not recommended but may be defined in a specification (with the same requirements as quality level C).The acceptance levels in this document are valid for all testing levels and for all techniques as define
41、d in ISO 17640, including tests with straight-beam probes.If characterization has been specified in accordance with ISO 23279, planar discontinuities are not acceptable and for non-planar discontinuities, the acceptance levels in this document apply.2 ISO 2018 All rights reservedBS EN ISO 11666:2018
42、ISO 11666:2018If characterization has not been specified, the acceptance levels in this document apply to all discontinuities.6.2 Indications from longitudinal discontinuitiesTable A.1 gives information on the techniques used for evaluation of discontinuities according to ISO 17640 and the related e
43、valuation and acceptance levels. Table A.2 specifies the reference levels for acceptance levels 2 and 3 for technique 2 using angle-beam scanning with transverse waves. Table A.3 specifies the reference levels for acceptance levels 2 and 3 for technique 2 using straight-beam scanning with longitudin
44、al waves.For techniques 1 (side-drilled holes) and 3 (rectangular notch), see Figures A.1 to A.4.For techniques 2 flat-bottomed holes (disk-shaped reflectors) and 4 (tandem technique), see Figures A.5 to A.10.Any discontinuities providing an amplitude below the acceptance level but with a length (ab
45、ove evaluation level) exceeding t, for the thickness range of 8 mm t t:H0 10 dBFor l 0,5 t:H0For 0,5 t t:H0 10 dBFor l t:H0For l t:H0 6 dBFor l 0,5 t:H0+ 4 dBFor 0,5 t t:H0 6 dBNOTE 1 Recording levels are 4 dB below the corresponding acceptance levels.NOTE 2 H0is the reference level. ISO 2018 All ri
46、ghts reserved 15BS EN ISO 11666:2018ISO 11666:2018Technique(accord-ing to ISO 17640 ) Evaluation level Acceptance level 2 (AL 2) Acceptance level 3 (AL 3)for AL 2 for AL 3 8 mm t t:H0 4 dBFor l 0,5 t:H0+ 6 dBFor 0,5 t t:H0 4 dBFor l t:H0+ 6 dBFor l t:H0For l 0,5 t:H0+ 10 dBFor 0,5 t t:H03(rectangula
47、r notch)H0 14 dB H0 10 dBFor l t:H0 4 dBFor l t:H0 10 dBFor l t:H0For l t:H0 6 dB4(tandem technique)H0 22 dB H0 18 dB For l 0,5 t:H0 8 dBFor 0,5 t t:H0 18 dBFor l 0,5 t:H0 4 dBFor 0,5 t t:H0 14 dBNOTE 1 Recording levels are 4 dB below the corresponding acceptance levels.NOTE 2 H0is the reference lev
48、el.Table A.2 Reference levels for acceptance levels 2 (AL 2) and 3 (AL 3) for technique 2 using angle-beam scanning with transverse wavesNominal probe frequencyMHz Thickness of parent material, t8 mm t 15 mm 15 mm t 40 mm 40 mm t 100 mmAL 2 AL 3 AL 2 AL 3 AL 2 AL 31,5 to 2,5 DDSR= 2,5 mm DDSR= 2,5 m
49、m DDSR= 3,0 mm DDSR= 3,0 mm3,0 to 5,0 DDSR= 1,5 mm DDSR= 1,5 mm DDSR= 2,0 mm DDSR= 2,0 mm DDSR= 3,0 mm DDSR= 3,0 mmNOTE DDSRis the diameter of the disk-shaped reflector.Table A.3 Reference levels for acceptance levels 2 (AL 2) and 3 (AL 3) for technique 2 using straight-beam scanning with longitudinal wavesNominal probe frequencyMHz Thickness of parent material, t8 mm t 15 mm 15 mm t 40 mm 40 mm t 100 mmAL 2 AL 3 AL 2 AL3 AL 2 AL 31,5 to 2,5 DDSR= 2,5
