1、BSI Standards PublicationBS EN ISO 19232-3:2013Non-destructive testing Image quality of radiographsPart 3: Image quality classes (ISO19232-3:2013)BS EN ISO 19232-3:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO19232-3:2013. It supersedes BS EN 462-3:19
2、97 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee WEE/46, Non-destructive testing.A list of organizations represented on this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 secretary.This publication does not purport to include all the necessaryprovisions
3、of a contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 75215 5ICS 19.100Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the
4、 authority of theStandards Policy and Strategy Committee on 31 July 2013.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 19232-3 June 2013 ICS 19.100 Supersedes EN 462-3:1996English Version Non-destructive testing - Image quality of radio
5、graphs - Part 3: Image quality classes (ISO 19232-3:2013) Essais non destructifs - Qualit dimage des radiogrammes - Partie 3: Classes de qualit dimage (ISO 19232-3:2013)Zerstrungsfreie Prfung - Bildgte von Durchstrahlungsaufnahmen - Teil 3: Bildgteklassen (ISO 19232-3:2013) This European Standard wa
6、s approved by CEN on 15 May 2013. 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 references concerning such natio
7、nal 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 member into its own langua
8、ge 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 Republic of Macedonia, France, Germany, Greece,
9、Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Mana
10、gement Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 19232-3:2013: EBS EN ISO 19232-3:2013EN ISO 19232-3:2013 (E) 3 Foreword This document (EN ISO 19232-3:2013) has been prepared
11、 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 by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text o
12、r by endorsement, at the latest by December 2013, and conflicting national standards shall be withdrawn at the latest by December 2013. 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 responsib
13、le for identifying any or all such patent rights. This document supersedes EN 462-3:1996. 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, Cze
14、ch 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdo
15、m. Endorsement notice The text of ISO 19232-3:2013 has been approved by CEN as EN ISO 19232-3:2013 without any modification. BS EN ISO 19232-3:2013ISO 19232-3:2013(E) ISO 2013 All rights reserved iiiContents PageForeword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Image quality
16、 classes . 24.1 Single-wall radiography 24.2 Double-wall radiography . 25 Arrangement. 26 Determination of image quality value . 27 Image quality values for gamma radiography . 38 Single-wall technique; IQI on source side . 49 Single-wall technique; IQI on source side . 510 Double-wall technique; Do
17、uble-image; IQI on source side 611 Double-wall technique; Double-image; IQI on source side 712 Double-wall technique; Single or double-image; IQI on film side . 813 Double-wall technique; Single or double-image; IQI on film side . 9BS EN ISO 19232-3:2013ISO 19232-3:2013(E)ForewordISO (the Internatio
18、nal 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 technical committee has been
19、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 electrotechnical standar
20、dization.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 the member bodies for vot
21、ing. 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 identifying any or all such
22、 patent rights.ISO 19232-3 was prepared by the European Committee for Standardization (CEN) in collaboration with ISO Technical Committee TC 135, Non-destructive testing, Subcommittee SC 5, Radiation methods, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agree
23、ment).This second edition cancels and replaces the first edition (ISO 19232-3:2004), which has been technically revised. Changes include: deletion of “ferrous metals” in the scope; update of references and definitions; replacement of film by detector, which includes film and digital detectors; use o
24、f new reduced IQI values for inspection with the gamma sources 192Ir and 75Se, by agreement of contracting parties and deletion of footnotes in the Tables 1 to 12; correction of misprints in Tables 5, 6, and 8.ISO 19232 consists of the following parts, under the general title Non-destructive testing
25、 Image quality of radiographs: Part 1: Determination of the image quality values using wire-type image quality indicators Part 2: Determination of the image quality value using step/hole-type image quality indicators Part 3: Image quality classes Part 4: Experimental evaluation of image quality valu
26、es and image quality tables Part 5: Determination of the image unsharpness value using duplex wire-type image quality indicatorsiv ISO 2013 All rights reservedBS EN ISO 19232-3:2013INTERNATIONAL STANDARD ISO 19232-3:2013(E)Non-destructive testing Image quality of radiographs Part 3: Image quality cl
27、asses1 ScopeThis part of ISO 19232 specifies the minimum image quality values to ensure a uniform radiographic quality. It applies to the two types of image quality indicator as detailed in ISO 19232-1 for wire-type IQI and ISO 19232-2 for step/hole-type IQI and for the two techniques described in I
28、SO 5579. Values are specified for the two classes of radiographic technique specified in ISO 5579.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited ap
29、plies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 5579, Non-destructive testing Radiographic examination of metallic materials by X- and gamma rays Basic rulesISO 5580, Non-destructive testing Industrial radiographic illuminators Mini
30、mum requirementsISO 17636 (all parts), Non-destructive testing of welds Radiographic testingISO 19232-1, Non-destructive testing Image quality of radiographs Part 1: Determination of the image quality of radiographs using wire-type indicatorsISO 19232-2, Non-destructive testing Image quality of radi
31、ographs Part 2: Determination of the image quality value using step/hole-type image quality indicators3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 5579 and the following apply.3.1image quality indicatorIQIdevice comprising a series of elements of g
32、raded dimensions which enable a measure of the image quality to be obtainedNote 1 to entry: The elements of IQI are commonly wires or steps with holes.3.2image quality valuemeasure of the image quality required or achieved and is equal to the thinnest element which can be detected on the radiographN
33、ote 1 to entry: See Tables 1 to 12 for the related values.3.3image quality tabletable of minimum required image quality values versus the penetrated thickness ranges ISO 2013 All rights reserved 1BS EN ISO 19232-3:2013ISO 19232-3:2013(E)4 Image quality classes4.1 Single-wall radiographyThe image qua
34、lity classes given in Tables 1 to 4 can be obtained if the requirements of ISO 5579 are met:a) Image quality class A for the class A radiographic basic technique (see ISO 5579);b) Image quality class B for the class B radiographic improved technique (see ISO 5579).Image quality values given in Table
35、s 1 to 4 apply in cases where the IQI is placed on the source side. If it is not possible to place the IQI on the source side, it may be placed on the detector side. Tables 1 to 4 cannot be applied in this case.NOTE The use of exceptional arrangements (for example, use of an iridium 192 source for t
36、hin plate sections) can result in obtaining different image quality values from those specified (see Clause 7).4.2 Double-wall radiographyThe image quality classes given in Tables 5 to 12 can be obtained if the requirements of ISO 5579 are met:a) Image quality class A for the class A radiographic te
37、chnique (see ISO 5579);b) Image quality class B for the class B radiographic technique (see ISO 5579).NOTE The use of exceptional arrangements can result in obtaining different image quality values from those specified (see Clause 7).When using double-wall radiographic technique, the penetrated thic
38、kness, w, can be the sum of both wall thicknesses, t.Tables 5 to 8 indicate the image quality values corresponding to the image quality classes A and B for a double-wall test with interpretation of the two walls, the IQI being placed on the source side of the object (IQI on the source side).Tables 9
39、 to 12 indicate the image quality values corresponding to the image quality classes A and B for a double-wall test with interpretation of the single-image, the IQI being placed on the film side of the object (IQI on the detector side).Tables 9 to 12 may also be used to indicate the image quality cor
40、responding to the double-wall/double-image technique when the IQI is placed on the detector side. This may be the case of elliptical radiographs according to ISO 17636.5 ArrangementWhen the radiograph is taken, the IQI shall be placed on the side of the section under test facing the source of radiat
41、ion and remote from the detector.If this is not possible, the IQI may be placed adjacent to the side of the section under test nearest the detector. To indicate that this arrangement has been used, the image of a letter F shall be visible on the radiograph near the IQI marking.The IQI shall be place
42、d on the object in an area where the thickness is as uniform as possible.Special arrangements may be determined by application standards.6 Determination of image quality valueIn determining the image quality value, the conditions for viewing radiographs specified in ISO 5580 shall be observed.2 ISO
43、2013 All rights reservedBS EN ISO 19232-3:2013ISO 19232-3:2013(E)For wire-type IQIs, the number of the thinnest wire which is still clearly visible on the radiograph shall be taken as the image quality value achieved. The image of a wire is accepted to be visible if a continuous length of at least 1
44、0 mm is clearly visible.For step/hole-type IQIs, the number of the smallest hole which is clearly visible on the radiograph shall be taken as the image quality value. When the step contains two holes, both shall be visible.In general, the image quality value shall be determined for every radiograph.
45、 If steps have been taken to guarantee that radiographs of similar test objects and regions are produced with identical exposure and processing conditions and no differences in the image quality value are likely, the image quality need not be verified for every radiograph, the extent of image qualit
46、y verification being subject to agreement between the contracting parties.7 Image quality values for gamma radiographyIf 192Ir or 75Se sources are used, IQI values worse than the ones listed in Tables 1 to 12 may be accepted by agreement of contracting parties as follows:Double-wall, double-image te
47、chniques (Tables 5 to 8), both class A and B (w = 2t): 10 mm 250 W 4Table 2 Step and hole IQIImage quality class ANormal thickness, t mmIQI valuet 2 H 32 400 H 184 ISO 2013 All rights reservedBS EN ISO 19232-3:2013ISO 19232-3:2013(E)9 Single-wall technique; IQI on source sideTable 3 Wire IQIImage qu
48、ality class BNominal thickness, t mmIQI valuet 1,5 W 191,5 350 W 5Table 4 Step and hole IQIImage quality class BNominal thickness, t mmIQI valuet 2,5 H 22,5 380 W 3Table 6 Step and hole IQIImage quality class APenetrated thickness, w mmIQI valuew 1 H 31 250 W 5Table 8 Step and hole IQIImage quality
49、class BPenetrated thickness, w mmIQI valuew 1 H 21 375 W 4Table 10 Step and hole IQIImage quality class APenetrated thickness, w mmIQI valuew 2 H 32 300 W 6Table 12 Step and hole IQIImage quality class BPenetrated thickness, w mmIQI valuew 2,5 H 22,5 w 5,5 H 35,5 w 9,5 H 49,5 w 15 H 515 w 24 H 624 w 40 H 740 w 60 H 860 w 80 H 9 ISO 2013 All rights reserved 9This page deliberately left blankThis page deliberately left blankBSI is the national body responsible for preparing Britis
