1、December 2013 Translation by DIN-Sprachendienst.English price group 6No 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).IC
2、S 19.100!%*Fi“2073570www.din.deDDIN EN ISO 19232-4Non-destructive testing Image quality of radiographs Part 4: Experimental evaluation of image quality values and imagequality tables (ISO 19232-4:2013);English version EN ISO 19232-4:2013,English translation of DIN EN ISO 19232-4:2013-12Zerstrungsfre
3、ie Prfung Bildgte von Durchstrahlungsaufnahmen Teil 4: Experimentelle Ermittlung von Bildgtezahlen und Bildgtetabellen(ISO 19232-4:2013);Englische Fassung EN ISO 19232-4:2013,Englische bersetzung von DIN EN ISO 19232-4:2013-12Essais non destructifs Qualit dimage des radiogrammes Partie 4: valuation
4、exprimentale des indices de qualit dimage et des tables de qualitdimage (ISO 19232-4:2013);Version anglaise EN ISO 19232-4:2013,Traduction anglaise de DIN EN ISO 19232-4:2013-12SupersedesDIN EN 462-4:1994-12www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be c
5、onsidered authoritative.811.13 DIN EN ISO 19232-4:2013-12 2 National foreword This document (EN ISO 19232-4:2013) 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”.
6、 The responsible German body involved in its preparation was the Normenausschuss Materialprfung (Materials Testing 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-destructiv
7、e testing Image quality of radiographs: Part 1: Determination of the image quality value 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 qual
8、ity values and image quality tables Part 5: Determination of the image unsharpness value using duplex wire-type image quality indicators Amendments This standard differs from DIN EN 462-4:1994-12 as follows: a) the content of DIN EN 462-4:1994-12 has been adopted with minor technical changes; b) the
9、 text of the standard has been editorially revised. Previous editions DIN 1914: 1935-08 DIN 54110: 1953-01, 1954-04 DIN 54109-2: 1964-10, 1989-07 DIN EN 462-4: 1994-12 A comma is used as the decimal marker.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 19232-4 June 2013 ICS 19.100 Supersed
10、es EN 462-4:1994 English Version Non-destructive testing Image quality of radiographs Part 4: Experimental evaluation of image quality values and image quality tables (ISO 19232-4:2013) Essais non destructifs Qualit dimage des radiogrammes Partie 4: valuation exprimentale des indices de qualit dimag
11、e et des tables de qualit dimage (ISO 19232-4:2013) Zerstrungsfreie Prfung Bildgte von Durchstrahlungsaufnahmen Teil 4: Experimentelle Ermittlung von Bildgtezahlen und Bildgtetabellen (ISO 19232-4:2013) This European Standard was approved by CEN on 15 May 2013. CEN members are bound to comply with t
12、he 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 national standards may be obtained on application to the CEN-CENELEC Manageme
13、nt 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 language and notified to the CEN-CENELEC Management Centre has the same status
14、 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, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
15、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 Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of
16、exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 19232-4:2013: E Contents PageForeword .31 Scope . 42 Terms and definitions . 43 Experimental evaluation of image quality values 44 Determination of image quality tables 5 5Bibliography 62DIN EN ISO
17、 19232-4:2013-12 EN ISO 19232-4 (E) Foreword This document (EN ISO 19232-4:2013) 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 by AFNOR. This European Stan
18、dard 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 standards shall be withdrawn at the latest by December 2013. Attention is drawn to the possibility that some of the elements o
19、f 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 462-4:1994. This second edition cancels and replaces the first edition (ISO 19232-4:2004), of which it constitutes a minor
20、revision with the following changes: null updated references; null correction of Figure 1 and its key. ISO 19232 consists of the following parts, under the general title Non-destructive testing Image quality of radiographs: null Part 1: Determination of the image quality value using wire-type image
21、quality indicators null Part 2: Determination of the image quality value using step/hole-type image quality indicators null Part 3: Image quality classes null Part 4: Experimental evaluation of image quality values and image quality tables null Part 5: Determination of the image unsharpness value us
22、ing duplex wire-type image quality indicators Endorsement notice The text of ISO 19232-4:2013 has been approved by CEN as EN ISO 19232-4:2013 without any modification. 3DIN EN ISO 19232-4:2013-12 EN ISO 19232-4 (E) According to the CEN-CENELEC Internal Regulations, the national standards organizatio
23、ns 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, Luxembourg, Malta,
24、 Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. 1 ScopeThis part of ISO 19232 gives instructions for the determination of image quality values and image quality tables.If the IQI requirements specified in ISO 19232-3 can
25、not be used because, for example, the absorption coefficients of the IQI material and the inspected material differ by more than 30 %, test exposures are necessary to determine acceptance of image quality values. The image quality values achieved by the test exposures are required for all exposures
26、made under the same radiographic conditions.2 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.2.1image quality indicatorIQIdevice comprising a series of elements of graded dimensions which enable a measure of the image quality to be obtainedNote 1 to
27、 entry: The elements of IQI are commonly wires or steps with holes.2.2image qualitycharacteristic of a radiographic image which determines the degree of detail which it shows2.3image quality valuemeasure of the image quality required or achieved and is equal to the thinnest element which can be dete
28、cted on the radiograph2.4image quality tabletable of minimum required image quality values versus the penetrated thickness ranges3 Experimental evaluation of image quality valuesFor the experimental determination of image quality values, the same radiographic conditions and IQI shall be used as spec
29、ified for the subsequent examination.Two test exposures shall be made under the specified conditions. If the image quality values read from these two exposures are identical, this value shall be accepted as the required image quality value. If the image quality values from the two test exposures are
30、 different, the procedure shall be repeated.4DIN EN ISO 19232-4:2013-12 EN ISO 19232-4 (E) 4 Determination of image quality tablesIf different thicknesses of the same material are radiographed, an image quality table shall be established. An example of the image quality values for different penetrat
31、ed thicknesses is shown in Figure 1. The step curve below the experimental values defines the image quality values and penetrated thickness steps of the image quality table. For an example, see Table 1.KeyA . G image quality valuew penetrated thickness1 interpolated experimental curve2 resulting ste
32、p curve corresponding to Table 1image quality determined, material e.g. steelFigure 1 Example for the determination of an image quality tableTable 1 Example of an image quality tablePenetrated thickness w mmImage quality valuew 2 A2 40 G5DIN EN ISO 19232-4:2013-12 EN ISO 19232-4 (E) Bibliography1 ISO 5579, Non-destructive testing Radiographic testing of metallic materials using film and X- or gamma rays Basic rules6DIN EN ISO 19232-4:2013-12 EN ISO 19232-4 (E)
