1、February 2014 Translation by DIN-Sprachendienst.English price group 10No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).I
2、CS 19.100!%,“2090496www.din.deDDIN EN ISO 19232-3Non-destructive testing Image quality of radiographs Part 3: Image quality classes (ISO 19232-3:2013);English version EN ISO 19232-3:2013,English translation of DIN EN ISO 19232-3:2014-02Zerstrungsfreie Prfung Bildgte von Durchstrahlungsaufnahmen Teil
3、 3: Bildgteklassen (ISO 19232-3:2013);Englische Fassung EN ISO 19232-3:2013,Englische bersetzung von DIN EN ISO 19232-3:2014-02Essais non destructifs Qualit dimage des radiogrammes Partie 3: Classes de qualit dimage (ISO 19232-3:2013);Version anglaise EN ISO 19232-3:2013,Traduction anglaise de DIN E
4、N ISO 19232-3:2014-02SupersedesDIN EN ISO 19232-3:2013-12www.beuth.deDocument comprises 16 pagesIn case of doubt, the German-language original shall be considered authoritative.01.14 DIN EN ISO 19232-3:2014-02 2 A comma is used as the decimal marker. National foreword This document (EN ISO 19232-3:2
5、013) has been prepared by Technical Committee CEN/TC 138 “Non-destructive testing” (Secretariat: AFNOR, France) in collaboration with Technical Committee ISO/TC 135 “Non-destructive testing”. The responsible German body involved in its preparation was the Normenausschuss Materialprfung (Materials Te
6、sting Standards Committee), Working Committee NA 062-08-22 AA Durchstrahlungsprfung und Strahlenschutz. DIN EN ISO 19232 consists of the following parts under the general title Non-destructive testing Image quality of radiographs: Part 1: Determination of the image quality value using wire-type imag
7、e 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 values and image quality tables Part 5: Determination of the image unsharpness value using duplex wire-ty
8、pe image quality indicators The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 5579 DIN EN ISO 5579 ISO 5580 DIN EN 25580 ISO 19232-1 DIN EN ISO 19232-1 ISO 17636 (all parts) DIN EN ISO 17636 (all parts) Amendments This standard differs fr
9、om DIN EN 462-3:1996-11 as follows: a) the content of DIN EN 462-3:1996-11 has been adopted with minor technical changes; b) the text of the standard has been editorially revised. Compared with DIN EN ISO 19232-3:2013-12, the following corrections have been made to the German version only and theref
10、ore do not affect the English text: a) in Clause 5 “Arrangement”, the 3rdparagraph has been deleted; b) in Clause 7 “Image quality values for gamma radiography”, the designation “Ir-392” has been corrected to read “Ir-192” (192Ir). Previous editions DIN EN 462-3: 1996-11 DIN EN ISO 19232-3: 2013-12
11、DIN EN ISO 19232-3:2014-02 3 National Annex NA (informative) Bibliography DIN EN 25580, Non-destructive testing Industrial radiographic illuminators Minimum requirements DIN EN ISO 5579, Non-destructive testing Radiographic examination of metallic materials using film and X- or gamma rays Basic rule
12、s DIN EN ISO 17636 (all parts), Non-destructive testing of welds Radiographic testing DIN EN ISO 19232-1, Non-destructive testing Image quality of radiographs Part 1: Determination of the image quality value using wire-type image quality indicators DIN EN ISO 19232-3:2014-02 4 This page is intention
13、ally blank EUROPEAN 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 radiographs - Part 3: Image quality classes (ISO 19232-3:2013) Essais non destructifs - Qualit dimage des radiogrammes -
14、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 was approved by CEN on 15 May 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which sti
15、pulate 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 national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European
16、 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 language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are th
17、e national standards bodies of 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, Norway, Poland, Portugal, Romani
18、a, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means res
19、erved worldwide for CEN national Members. Ref. No. EN ISO 19232-3:2013: EContents PageForeword 31 Scope . 42 Normative references 43 Terms and definitions . 44 Image quality classes . 54.1 Single-wall radiography 54.2 Double-wall radiography . 55 Arrangement. 56 Determination of image quality value
20、. 57 Image quality values for gamma radiography . 68 Single-wall technique; IQI on source side . 79 Single-wall technique; IQI on source side . 810 Double-wall technique; Double-image; IQI on source side 911 Double-wall technique; Double-image; IQI on source side . 1012 Double-wall technique; Single
21、 or double-image; IQI on film side 1113 Double-wall technique; Single or double-image; IQI on film side 12DIN EN ISO 19232-3:2014-02 EN ISO 19232-3:2013 (E) 2 Foreword This document (EN ISO 19232-3:2013) has been prepared by Technical Committee ISO/TC 135 “Non- destructive testing” in collaboration
22、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 or by endorsement, at the latest by December 2013, and conflicting national sta
23、ndards 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 responsible for identifying any or all such patent rights. This document supersedes EN
24、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, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
25、 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 Kingdom. Endorsement notice The text of ISO 19232-3:2013 has been approved by CEN as
26、 EN ISO 19232-3:2013 without any modification. DIN EN ISO 19232-3:2014-02 EN ISO 19232-3:2013 (E) 3 1 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
27、 wire-type IQI and ISO 19232-2 for step/hole-type IQI and for the two techniques described in ISO 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 docu
28、ment and are indispensable for its application. For dated references, only the edition cited applies. 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 ga
29、mma rays Basic rulesISO 5580, Non-destructive testing Industrial radiographic illuminators Minimum 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 r
30、adiographs using wire-type indicatorsISO 19232-2, Non-destructive testing Image quality of radiographs 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 a
31、nd the following apply.3.1image quality indicatorIQIdevice comprising a series of elements of graded 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 req
32、uired or achieved and is equal to the thinnest element which can be detected on the radiographNote 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 rangesDIN EN ISO 19232-3:2014-02 EN ISO 19232-
33、3:2013 (E) 4 4 Image quality classes4.1 Single-wall radiographyThe image quality 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 radiog
34、raphic improved technique (see ISO 5579).Image quality values given in Tables 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
35、of exceptional arrangements (for example, use of an iridium 192 source for thin 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
36、of ISO 5579 are met:a) Image quality class A for the class A radiographic technique (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
37、Clause 7).When using double-wall radiographic technique, the penetrated thickness, 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 bei
38、ng placed on the source side of the object (IQI on the source side).Tables 9 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 dete
39、ctor side).Tables 9 to 12 may also be used to indicate the image quality corresponding 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
40、 be placed on the side of the section under test facing the source of radiation 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 sh
41、all be visible on the radiograph near the IQI marking.The IQI shall be placed 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 condi
42、tions for viewing radiographs specified in ISO 5580 shall be observed.DIN EN ISO 19232-3:2014-02 EN ISO 19232-3:2013 (E) 5 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 a
43、ccepted to be visible if a continuous length of at least 10 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 ima
44、ge quality value shall be determined for every radiograph. 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
45、 verified for every radiograph, the extent of image quality 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 c
46、ontracting parties as follows:Double-wall, double-image techniques (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 18DIN EN ISO 19232-3:2014-02 EN ISO 19232-3:2013 (E) 7 9 Single-wall technique; IQ
47、I on source sideTable 3 Wire IQIImage quality 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 class BPenetrated thickness, w mmIQI va
