EN ISO 19232-5-2013 en Non-destructive testing - Image quality of radiographs - Part 5 Determination of the image unsharpness value using duplex wire-type image quality indicators《.pdf

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1、BSI Standards PublicationBS EN ISO 19232-5:2013Non-destructive testing Image quality of radiographsPart 5: Determination of the imageunsharpness value using duplex wire-type image quality indicators (ISO19232-5:2013)BS EN ISO 19232-5:2013 BRITISH STANDARDNational forewordThis British Standard is the

2、 UK implementation of EN ISO19232-5:2013. It supersedes BS EN 462-5:1996 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee WEE/46, Non-destructive testing.A list of organizations represented on this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.Thi

3、s publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 75217 9ICS 19.100Compliance with a British Standard cannot confer immuni

4、ty fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 July 2013.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 19232-5 June 2013 ICS 19.100 Supersedes EN 462-

5、5:1996English Version Non-destructive testing - Image quality of radiographs - Part 5: Determination of the image unsharpness value using duplex wire-type image quality indicators (ISO 19232-5:2013) Essais non destructifs - Qualit dimage des radiogrammes - Partie 5: Dtermination de lindice de flou d

6、e limage laide dindicateurs de qualit dimage duplex fils (ISO 19232-5:2013) Zerstrungsfreie Prfung - Bildgte von Durchstrahlungsaufnahmen - Teil 5: Bestimmung der Bildunschrfezahl mit Doppel-Drahtsteg-Bildgteprfkrpern (ISO 19232-5:2013) This European Standard was approved by CEN on 15 May 2013. CEN

7、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 national standards may be obtained on appli

8、cation 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 language and notified to the CEN-CENELEC Man

9、agement 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, Hungary, Iceland, Ireland, Italy, Latv

10、ia, 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 Management Centre: Avenue Marnix 17, B-100

11、0 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 19232-5:2013: EBS EN ISO 19232-5:2013EN ISO 19232-5:2013 (E) 3 Foreword This document (EN ISO 19232-5:2013) has been prepared by Technical Committee ISO/TC 135 “No

12、n-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 or by endorsement, at the latest by Dec

13、ember 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 responsible for identifying any or all such pat

14、ent rights. This document supersedes EN 462-5:1996. 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

15、, 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 Kingdom. Endorsement notice The text of ISO

16、19232-5:2013 has been approved by CEN as EN ISO 19232-5:2013 without any modification. BS EN ISO 19232-5:2013ISO 19232-5:2013(E) ISO 2013 All rights reserved iiiContents PageForeword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Specification of duplex wire-type IQI 14.1 Dimensio

17、ns, manufacture, and marking . 14.2 Declaration of conformity 25 Use of duplex wire . 3BS EN ISO 19232-5:2013ISO 19232-5:2013(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Internati

18、onal 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 liaison with IS

19、O, 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 technical comm

20、ittees 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 drawn to the po

21、ssibility 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 19232-5 was prepared by the European Committee for Standardization (CEN) in collaboration with ISO Technical Committee TC 135,

22、 Non-destructive testing, Subcommittee SC 5, Radiation methods, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).This second edition cancels and replaces the first edition (ISO 19232-5:2004), of which it constitutes a minor revision with the following

23、changes: updated references and definitions; change of writing order of the duplex wire number; statement that EN duplex wire IQIs of EN 462-5:2004 and its designation are identical to ISO duplex wire-type IQIs and its designation, as defined in this part of ISO 19232; replacement of film by detecto

24、r, which includes film and digital detectors; extended description for use of duplex wire-type IQI.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 image quality i

25、ndicators 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-type image qu

26、ality indicatorsiv ISO 2013 All rights reservedBS EN ISO 19232-5:2013INTERNATIONAL STANDARD ISO 19232-5:2013(E)Non-destructive testing Image quality of radiographs Part 5: Determination of the image unsharpness value using duplex wire-type image quality indicators1 ScopeThis part of ISO 19232 specif

27、ies a method of determining the total image unsharpness of radiographs and real-time radioscopic systems.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 c

28、ited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO/IEC 17050-1, Conformity assessment Suppliers declaration of conformity Part 1: General requirements3 Terms and definitionsFor the purposes of this document, the following terms

29、and definitions apply.3.1duplex wire-type image quality indicatorduplex wire-type IQIimage quality indicator specifically designed to assess the total image unsharpness of a radiograph and composed of a series of pairs of wire elements made of high-density metal3.2total image unsharpness valuesmalle

30、st number of the duplex wire pair, which is not separableNote 1 to entry: The corresponding unsharpness values are given in Table 1. See also Clause 4.4 Specification of duplex wire-type IQI4.1 Dimensions, manufacture, and marking4.1.1 Dimensions and materialThe duplex wire-type IQI shall consist of

31、 a series of 13 elements placed in a transparent rigid plastic holder. Each element shall consist of a pair of wires of circular section. The elements D1 to D3 are of tungsten, the others of platinum.The dimensions shall be in accordance with Figure 1. ISO 2013 All rights reserved 1BS EN ISO 19232-5

32、:2013ISO 19232-5:2013(E)Dimensions in millimetresEnlarged view of each wire pair (element)Key1 space for identification marking2 rigid plastic mountingaWire diameter, d, equals spacing between the wires.Figure 1 Duplex wire-type IQI4.1.2 ManufactureThe wire diameters and spacing of the wires are sho

33、wn in Table 1.4.1.3 MarkingThe marking of the duplex wire-type IQI (see Figure 1) shall give the following information: ISO and serial number.IQIs with the letters EN are considered to be identical to IQIs with the letters ISO.4.2 Declaration of conformityEach IQI shall be delivered with a declarati

34、on of conformity according to ISO/IEC 17050-1, which confirms that the IQI complies with this International Standard. For identification, the IQI shall be numbered and marked by the producer.2 ISO 2013 All rights reservedBS EN ISO 19232-5:2013ISO 19232-5:2013(E)Table 1 Duplex wire number, correspond

35、ing image unsharpness, and wire diameterDimensions in millimetresDuplex wire number Corresponding unsharpnessWire diameter and spacingdTolerances of wire diameter and wire spacingD13 0,10 0,050 0,005D12 0,13 0,063D11 0,16 0,080D10 0,20 0,100D9 0,26 0,130D8 0,32 0,160 0,01D7 0,40 0,200D6 0,50 0,250D5

36、 0,64 0,320D4 0,80 0,400D3 1,00 0,500 0,02D2 1,26 0,630D1 1,60 0,8005 Use of duplex wireThe duplex wire-type IQI should be used in conjunction with a wire- or step/hole-type IQI. It shall be placed on the source side of the object being examined and be aligned as closely as possible normal to the ax

37、is of the radiation beam.NOTE If the IQI is placed directly on the detector, the inherent detector unsharpness is measured.The image of the duplex wire-type IQI shall be examined with the aid of a magnifying glass up to 4 on film or by a profile function in digital radiography. The largest element (

38、i.e. pair of wires), the image of which has just merged from that of two separate wires into the single form without an identifiable space between the image of the two wires, is taken as the limit of discernibility. The total image unsharpness, u, is given by 2d, where d is the corresponding diamete

39、r of the wires and the wire spacing distance (see Figure 1 and Table 1). The value of d is considered to be the basic spatial resolution of the image.NOTE The duplex wire-type IQI is no alternative for the wire- or step/hole-type IQI because it relates only to unsharpness.Special conditions may be d

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