1、BS EN ISO 16946:2017Non-destructive testing Ultrasonic testing Specification for step wedgecalibration block (ISO16946:2017)BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN ISO 16946:2017 BRITISH STANDARDNational forewordThis British Standard is the UK implement
2、ation of EN ISO 16946:2017. It supersedes BS EN ISO 16946:2015 which iswithdrawn.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 publica
3、tion does not purport to 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 94950 0 ICS 19.100 Compliance with a British Standard cannot confer immunity fr
4、om legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2017.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 16946 March 2017 ICS 19.100
5、Supersedes EN ISO 16946:2015English Version Non-destructive testing - Ultrasonic testing - Specification for step wedge calibration block (ISO 16946:2017) Essais non destructifs - Essais par ultrasons - Spcifications relatives aux blocs dtalonnage gradins (ISO 16946:2017) Zerstrungsfreie Prfung - Ul
6、traschallprfung - Beschreibung des Stufenkeil-Kalibrierkrpers (ISO 16946:2017) This European Standard was approved by CEN on 5 February 2017. 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 nat
7、ional 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, French, German). A ve
8、rsion 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, Croatia, Cyprus,
9、 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, Turkey and Unite
10、d Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN I
11、SO 16946:2017 EBS EN ISO 16946:2017EN ISO 16946:2017 (E) 3 European foreword This document (EN ISO 16946:2017) has been prepared by Technical Committee ISO/TC 135 “Non-destructive testing” in collaboration with Technical Committee CEN/TC 138 “Non-destructive testing” the secretariat of which is held
12、 by AFNOR. 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 2017, and conflicting national standards shall be withdrawn at the latest by September 2017. Attention is drawn to the possibil
13、ity 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. This document supersedes EN ISO 16946:2015. According to the CEN-CENELEC Internal Regulations, the national standards or
14、ganizations of the following 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, Luxembour
15、g, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 16946:2017 has been approved by CEN as EN ISO 16946:2017 without any modification. BS EN ISO 16946:2017ISO 16946:2017(E)
16、Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Dimensions . 15 Alternative dimensions . 26 Material 27 Preparation 28 Marking 39 Declaration of conformity . 3Bibliography 4 ISO 2017 All rights reserved iiiContents PageBS EN ISO 16946:2017ISO 16946:2017(E)For
17、ewordISO (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 techn
18、ical 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
19、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 particular the different approval criteria needed for the different types of ISO documents should be noted. This document w
20、as 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 of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such
21、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 (see www .iso .org/ patents).Any trade name used in this document is information given for the convenience of users and doe
22、s 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 as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade
23、 (TBT) see the following URL: www .iso .org/ iso/ foreword .htmlThis document was prepared by Technical Committee ISO/TC 135, Non-destructive testing, Subcommittee SC 3, Ultrasonic testing.This second edition cancels and replaces the first edition (ISO 16946:2015), of which it constitutes a minor re
24、vision with the following changes:a) the normative references have been updated;b) Figure 1 has been updated in respect of the tolerances for length and width. iv ISO 2017 All rights reservedBS EN ISO 16946:2017ISO 16946:2017(E)IntroductionA step wedge calibration block is not meant to check an ultr
25、asonic instrument. A step wedge calibration block makes it possible, during practical testing, to check simply, from time to time, the setting of the time base and the sensitivity of the ultrasonic equipment.Calibration block No. 1 is specified in ISO 2400.Calibration block No. 2 is specified in ISO
26、 7963.Requests for official interpretations of any aspect of this document are to be directed to the Secretariat of ISO/TC 135/SC 3 via your national standards body, a complete listing of which can be found at www .iso .org. ISO 2017 All rights reserved vBS EN ISO 16946:2017BS EN ISO 16946:2017Non-d
27、estructive testing Ultrasonic testing Specification for step wedge calibration block1 ScopeThis document specifies the dimensions, material, and manufacture of a step wedge steel block for the calibration of ultrasonic instruments.2 Normative referencesThe following documents are referred to in the
28、text in such a way 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
29、inspection VocabularyEN 1330-4, Non-destructive testing Terminology Part 4: Terms used in ultrasonic testingEN 10025-2, Hot rolled products of structural steels Part 2: Technical delivery conditions for non-alloy structural steels3 Terms and definitionsFor the purposes of this document, the terms an
30、d definitions given in ISO 5577 and EN 1330-4 apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp4 Dimensi
31、onsThe dimensions of the block are given in Figure 1.The tolerances are 0,1 mm for the length and the width of the block and 0,02 mm for the step thickness.All external surfaces shall be machined to an Ra value not greater than 0,8 m.INTERNATIONAL STANDARD ISO 16946:2017(E) ISO 2017 All rights reser
32、ved 1BS EN ISO 16946:2017ISO 16946:2017(E)Dimensions in millimetresKey1 manufacturers trademark2 International Standard number, serial numberFigure 1 Step wedge calibration block5 Alternative dimensionsIn the event of a different size of calibration block being required which is not described in thi
33、s document, the principles embodied in the design and manufacture of a calibration block to the requirements of this document shall be applied to such a block.The tolerances are 0,1 mm for the length and the width of the block and 0,02 mm for the step thickness up to 12,5 mm and 0,1 mm for larger th
34、ickness.6 MaterialThe calibration block shall be made from steel of grade S355J0 in accordance with EN 10025-2 or from an equivalent steel grade.7 PreparationBlocks shall be rough-machined to a plan parallel plate which is at least 3 mm larger at all sides than the dimensions of the finalized step b
35、lock.In order to obtain a fine grain structure and good homogeneity, the block shall be heat treated as follows:a) maintain at 920 C for 30 min;b) rapid cooling (quenching) in water;c) tempering by heating to 650 C for at least 3 h;d) cooling in still air.2 ISO 2017 All rights reservedBS EN ISO 1694
36、6:2017ISO 16946:2017(E)After heat treatment, at least 2 mm shall be removed from all surfaces.Prior to final machining, the block shall undergo ultrasonic testing to prove that the block is free from internal discontinuities.For this purpose, an ultrasonic test shall be performed with a longitudinal
37、 wave normal-beam probe of at least 10 MHz nominal centre frequency and having a transducer size of 10 mm to 15 mm. The block shall be checked from at least two long surfaces to cover the complete volume. The following two acceptance criteria apply:1) with the probe scanning as shown in Figure 2, th
38、e noise level produced by the grain structure shall always be at least 50 dB lower than the amplitude of the fourth back wall echo;2) no echo arising from any discontinuity in the material shall have an amplitude greater than the grain scatter noise level.Figure 2 Scan patternThe velocity of longitu
39、dinal waves shall be verified as being 5 920 m/s 30 m/s.8 MarkingThe block shall be permanently marked witha) the manufacturers trademark,b) the number of this document, i.e. ISO 16946, andc) a unique serial number.9 Declaration of conformityFor each block, a declaration shall be issued by the manuf
40、acturer statinga) that the block complies with this document, andb) the mean value of the measured longitudinal wave velocities, vl. ISO 2017 All rights reserved 3BS EN ISO 16946:2017ISO 16946:2017(E)Bibliography1 ISO 2400, Non-destructive testing Ultrasonic testing Specification for calibration blo
41、ck No. 12 ISO 4287, Geometrical Product Specifications (GPS) Surface texture: Profile method Terms, definitions and surface texture parameters3 ISO 7963, Non-destructive testing Ultrasonic testing Specification for calibration block No. 24 ISO 16809, Non-destructive testing Ultrasonic thickness meas
42、urement 4 ISO 2017 All rights reservedBS EN ISO 16946:2017This page deliberately left blankThis page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related publications, information and services.BSI is incorporated by Royal Charter. Br
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