1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 11666:2010Non-destructive testing ofwelds Ultrasonic testing Acceptance levels (ISO11666:2010)BS EN ISO 11666:2010 BRITISH STANDARDNational forewordThis British Standar
2、d is the UK implementation of EN ISO11666:2010. It supersedes BS EN 1712:1997 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee WEE/46, Non-destructive testing.A list of organizations represented on this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 secretar
3、y.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 55535 0ICS 25.160.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published u
4、nder the authority of theStandards Policy and Strategy Committee on 31 January 2011.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11666 December 2010 ICS 25.160.40 Supersedes EN 1712:1997English Version Non-destructive testing of welds
5、- Ultrasonic testing - Acceptance levels (ISO 11666:2010) Contrle non destructif des assemblages souds - Contrle par ultrasons - Niveaux dacceptation (ISO 11666:2010) Zerstrungsfreie Prfung von Schweiverbindungen - Ultraschallprfung von Schweiverbindungen - Zulssigkeitsgrenzen (ISO 11666:2010) This
6、European Standard was approved by CEN on 14 December 2010. 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 and bibliographical referen
7、ces 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 responsibility of a CEN m
8、ember 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, France, Germany, Greece, Hungary, Icela
9、nd, 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 EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue
10、Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 11666:2010: EBS EN ISO 11666:2010EN ISO 11666:2010 (E) 3 Foreword This document (EN ISO 11666:2010) has been prepared by Technical Committee CEN/TC
11、 121 “Welding”, the secretariat of which is held by DIN, in collaboration with Technical Committee ISO/TC 44 “Welding and allied processes“. 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 June 20
12、11, and conflicting national standards shall be withdrawn at the latest by June 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 rights.
13、This document supersedes EN 1712:1997. 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, France, Ger
14、many, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN ISO 11666:2010ISO 11666:2010(E) ISO 2010 All rights reserved iiiContents Page Foreword iv
15、 1 Scope1 2 Normative references1 3 Measurement of indication length.1 4 Sensitivity setting and levels .2 5 Acceptance levels .2 5.1 General .2 5.2 Longitudinal indications.3 5.3 Transverse indications .3 5.4 Grouping of indications3 5.5 Cumulative length of acceptable indications .4 Annex A (norma
16、tive) Levels.5 Annex B (normative) Fixed amplitude level technique .17 BS EN ISO 11666:2010ISO 11666:2010(E) iv ISO 2010 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of prepar
17、ing 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 li
18、aison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of
19、 technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to 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
20、 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 identifying any or all such patent rights. ISO 11666 was prepared by the European Committee for Standardization (CEN) Technical Committee TC 121, Welding, S
21、ubcommittee SC 5, Testing of welds, in collaboration with ISO Technical Committee TC 44, Welding and allied processes, Subcommittee SC 5, Testing and inspection of welds, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement). Requests for official interpret
22、ations of any aspect of this International Standard 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. BS EN ISO 11666:2010INTERNATIONAL STANDARD ISO 11666:2010(E) ISO 2010 All rights reserved 1Non
23、-destructive testing of welds Ultrasonic testing Acceptance levels 1 Scope This International Standard specifies ultrasonic acceptance levels 2 and 3 for full penetration welded joints in ferritic steels, which correspond to ISO 5817 quality levels B and C. An acceptance level corresponding to ISO 5
24、817 quality level D is not included in this International Standard as ultrasonic testing is generally not requested for this weld quality. These acceptance levels are applicable to testing carried out in accordance with ISO 17640. This International Standard applies to the examination of full penetr
25、ation ferritic steel welds, with thicknesses from 8 mm to 100 mm. It can also be used for other types of welds, materials and thicknesses above 100 mm, provided the examinations have been performed with necessary consideration of the geometry and acoustic properties of the component, and an adequate
26、 sensitivity can be employed to enable the acceptance levels of this International Standard to be applied. The nominal frequency of probes used in this International Standard is between 2 MHz and 5 MHz unless attenuation or requirements for higher resolution call for other frequencies. The use of th
27、ese acceptance levels in conjunction with frequencies outside this range needs to be considered carefully. 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, t
28、he latest edition of the referenced document (including any amendments) applies. ISO 5817, Welding Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded) Quality levels for imperfections ISO 17635, Non-destructive testing of welds General rules for metallic material
29、s ISO 17640, Non-destructive testing of welds Ultrasonic testing Techniques, testing levels, and assessment ISO 23279, Non-destructive testing of welds Ultrasonic testing Characterization of indications in welds 3 Measurement of indication length The length of an indication shall be determined by me
30、asuring the distance along the length over which the echo amplitude is above the evaluation level, using the fixed amplitude level technique specified in Annex B. Alternative techniques for measuring indication length may be used when specified. BS EN ISO 11666:2010ISO 11666:2010(E) 2 ISO 2010 All r
31、ights reserved4 Sensitivity setting and levels The sensitivity setting may be performed by one of the following techniques. For sensitivity setting and the subsequent examinations, the same technique shall be used: a) technique 1: based on 3 mm diameter side-drilled holes; b) technique 2: based on d
32、istance gain size (DGS) curves for flat-bottom holes (disk-shaped reflectors); c) technique 3: using a distance-amplitude-corrected (DAC) curve of a rectangular notch of 1 mm depth and 1 mm width; d) technique 4: using the tandem technique with reference to a 6 mm diameter flat-bottom hole (disk-sha
33、ped reflector). Four levels as defined in ISO 17640 are used in this International Standard: 1) reference level; 2) evaluation level; 3) recording levels (for two acceptance levels, reference levels are derived from the relevant acceptance level minus 4 dB); 4) acceptance levels (for two quality lev
34、els). All levels are linked to the reference reflectors specified in Table A.1. Annex A specifies levels. 5 Acceptance levels 5.1 General The relationship between acceptance levels, testing levels and quality levels is given in ISO 17635. See also Table 1. Table 1 Ultrasonic pulse echo technique (UT
35、) Quality level in accordance with ISO 5817 Testing technique and level in accordance with ISO 17640aAcceptance level in accordance with this International Standard B at least B 2 C at least A 3 D at least A 3baWhen characterization of indications is required, ISO 23279 shall be applied. bUT is not
36、recommended but can be defined in a specification (with the same requirements as quality level C). The acceptance levels in this International Standard are valid for all testing levels and for all techniques as defined in ISO 17640, including tests with straight beam probes. If characterization has
37、been specified in accordance with ISO 23279, planar indications are not acceptable and for non-planar indications, the acceptance levels in this International Standard apply. If characterization has not been specified, the acceptance levels in this International Standard apply to all indications. BS
38、 EN ISO 11666:2010ISO 11666:2010(E) ISO 2010 All rights reserved 35.2 Longitudinal indications Table A.1 gives information on the techniques used for evaluation of indications according to ISO 17640 and the related evaluation and acceptance levels. Table A.2 specifies the acceptance levels for techn
39、ique 2 using transverse waves. Table A.3 specifies the acceptance levels for technique 2 using longitudinal waves. For techniques 1 (side-drilled holes) and 3 (rectangular notch), see Figures A.1 to A.4. For techniques 2 flat-bottom holes (disk-shaped reflectors) and 4 (tandem technique), see Figure
40、s A.5 to A.8. Any indication with an amplitude below the acceptance level but with a length (above evaluation level) exceeding t, for the thickness range of 8 mm u t t: H0 10 dB For lu0,5 t: H0For 0,5 tt: H0 10 dB For lut: H0For lt: H0 6 dB For lu0,5 t: H0+4 dB For 0,5 tt: H0 6 dB 2 flat-bottom hole
41、s (disk-shaped reflectors) H0 8 dB in accordance withTable A.2 or A.3 H0 4 dB in accordance withTable A.2 or A.3 For lut: H0+2 dB For lt: H0 4 dB For lu0,5 t: H0+6 dB For 0,5 tt: H0 4 dB For lut: H0+6 dB For lt: H0For lu0,5 t: H0+10 dB For 0,5 tt: H03 (rectangular notch) H0 14 dB H0 10 dB For lut: H
42、0 4 dB For lt: H0 10 dB For lut: H0For lt: H0 6 dB 4 (tandem technique) H0 22 dB H0 18 dB For lu0,5 t: H0 8 dB For 0,5 tt: H0 18 dB For lu0,5 t: H04 dB For 0,5 tt: H0 14 dB Recording levels are 4 dB belowthe corresponding acceptance levels. H0is the reference level. ISO 201 0 All rights reserved 15B
43、S EN ISO 11666:2010ISO 11666:2010(E) 16 ISO 201 0 All rights reservedTable A.2 Reference levels for acceptance levels 2 and 3 fortechnique 2 using angle beam scanning with transverse waves Thickness ofparentmaterial, t8 mm ut15 mm 15 mm ut40 mm 40 mm ut100 mm Nominal probefrequencyMHz AL 2 AL 3 AL 2
44、 AL 3 AL 2 AL 3 1,5 to 2,5 DDSR=2,5 mm DDSR=2,5 mm DDSR=3,0 mm DDSR=3,0 mm 3,0 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 mm DDSRis the diameter of the disk-shaped reflector. Table A.3 Reference levels for acceptance levels 2 and 3 fortechnique 2 using straight beam
45、scanning with longitudinal wavesThickness ofparentmaterial, t8 mm ut15 mm 15 mm ut40 mm 40 mm ut100 mm Nominal probefrequencyMHz AL 2 AL 3 AL 2 AL3 AL 2 AL 3 1,5 to 2,5 DDSR=2,5 mm DDSR=2,5 mm DDSR=3,0 mm DDSR=3,0 mm 3,0 to 5,0 DDSR=2,0 mm DDSR=2,0 mm DDSR=2,0 mm DDSR=2,0 mm DDSR=3,0 mm DDSR=3,0 mm
46、DDSRis the diameter of the disk-shaped reflector. BS EN ISO 11666:2010ISO 11666:2010(E) ISO 2010 All rights reserved 17Annex B (normative) Fixed amplitude level technique The technique measures the lateral dimensions of an indication over which the echo is equal to or greater than the evaluation lev
47、el. To make a measurement, the beam is scanned over the indications, and the probe position and beam path range, at which the echo has fallen to the evaluation level, are noted (positions 1 and 2 in Figure B.1). The lateral dimension, l, is then determined by the distance between the positions 1 and
48、 2. Key l measured lateral dimension of indication 1, 2 positions where indication amplitudes are equal to the evaluation level aMaximum echo. bEvaluation level. Figure B.1 Fixed amplitude level technique using the beam axis This page deliberately left blankThis page deliberately left blankBSI is th
49、e independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter.British Standards Institution (BSI)raising standards worldwideBSI Group Headquarters389 Chiswick High Road London W4 4AL UKTel +44 (0)20 8996 9001Fax +44 (0)20 8996 Standards are updated by amendment or revision. Users of BritishStandards shou
