1、BSI Standards PublicationBS EN ISO 19232-2:2013Non-destructive testing Image quality of radiographsPart 2: Determination of the image qualityvalue using step/hole-type image qualityindicators (ISO 19232-2:2013)BS EN ISO 19232-2:2013 BRITISH STANDARDNational forewordThis British Standard is the UK im
2、plementation of EN ISO19232-2:2013. It supersedes BS EN 462-2:1994 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee WEE/46, Non-destructive testing.A list of organizations represented on this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 publ
3、ication 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 75214 8ICS 19.100Compliance with a British Standard cannot confer immunity fro
4、mlegal 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 19232-2 June 2013 ICS 19.100 Supersedes EN 462-2:1994
5、English Version Non-destructive testing - Image quality of radiographs - Part 2: Determination of the image quality value using step/hole-type image quality indicators (ISO 19232-2:2013) Essais non destructifs - Qualit dimage des radiogrammes - Partie 2: Dtermination de lindice de qualit dimage laid
6、e dindicateurs trous et gradins (ISO 19232-2:2013)Zerstrungsfreie Prfung - Bildgte von Durchstrahlungsaufnahmen - Teil 2: Bildgteprfkrper (Stufe/Loch-Typ) - Ermittlung der Bildgtezahll (ISO 19232-2:2013) This European Standard was approved by CEN on 15 May 2013. CEN members are bound to comply with
7、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 application to the CEN-CENELEC Managem
8、ent 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 statu
9、s 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,
10、 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
11、 exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 19232-2:2013: EBS EN ISO 19232-2:2013EN ISO 19232-2:2013 (E) 3 Foreword This document (EN ISO 19232-2:2013) has been prepared by Technical Committee ISO/TC 135 “Non-destructive testing“ in collabo
12、ration 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 natio
13、nal 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 patent rights. This document superse
14、des EN 462-2:1994. 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 Mac
15、edonia, 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 19232-2:2013 has been approved by
16、 CEN as EN ISO 19232-2:2013 without any modification. BS EN ISO 19232-2:2013ISO 19232-2:2013(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carrie
17、d 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 ISO, also take part in the work. IS
18、O 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 committees is to prepare Internationa
19、l 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 possibility that some of the elemen
20、ts 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 19232-2 was prepared by the European Committee for Standardization (CEN) in collaboration with ISO Technical Committee TC 135, Non-destructive testing, Subcomm
21、ittee 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 19232-2:2004), of which it constitutes a minor revision with the following changes: updated references; stat
22、ement that EN wire IQIs of EN 462-2:19941and its designation are identical to ISO wire IQIs and its designation, as defined in this part of ISO 19232; replacement of film by detector, which includes film and digital detectors.It also incorporates the Technical Corrigendum, ISO 19232-2:2004/Cor. 1:20
23、07.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 indicators Part 2: Determination of the image quality value using step/hole-type image quality ind
24、icators 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 quality indicators ISO 2013 All rights reserved iiiBS EN ISO 19232-2:2013BS EN ISO 19232-2:2013Non-
25、destructive testing Image quality of radiographs Part 2: Determination of the image quality value using step/hole-type image quality indicators1 ScopeThis part of ISO 19232 specifies a device and a method for the determination of the image quality of radiographs using step/hole-type image quality in
26、dicators.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 applies. For undated references, the latest edition of the referenced document (including a
27、ny amendments) applies.ISO 5580, Non-destructive testing Industrial radiographic illuminators Minimum requirementsISO/IEC 17050-1, Conformity assessment Suppliers declaration of conformity Part 1: General requirementsISO 19232-4, Non-destructive testing Image quality of radiographs Part 4: Experimen
28、tal evaluation of image quality values and image quality tables3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1image qualitycharacteristic of a radiographic image which determines the degree of detail it shows3.2image quality indicatorIQIdevice
29、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.3.3image quality valuemeasure of the image quality required or achieved and is equal to the thinnest element whic
30、h can be detected on the radiographNote 1 to entry: For step/hole-type IQIs, the element numbers are the hole numbers as given in Table 1.INTERNATIONAL STANDARD ISO 19232-2:2013(E) ISO 2013 All rights reserved 1BS EN ISO 19232-2:2013ISO 19232-2:2013(E)4 Specification for step/hole-type image quality
31、 indicators4.1 Dimensions, manufacture, designation4.1.1 DimensionsThe IQI system is based on a series of 18 steps of different thicknesses and holes of corresponding diameters which are specified in Table 1 along with the relevant tolerances and the hole numbers. These steps and holes have been sub
32、divided into four overlapping ranges of six consecutive hole numbers, viz. H 1 to H 6, H 5 to H 10, H 9 to H 14, and H 13 to H 18.Dimensions in millimetresKeyIQI No.H 1 H 5 H 9 H 13h 10 mm 10 mm 10 mm 15 mml 5 mm 7 mm 7 mm 15 mmaSpace for identification marking.Figure 1 Step/hole-type image quality
33、indicator4.1.2 ManufactureThe steps of thicknesses lower than 0,8 mm shall contain two holes of the same diameter. The steps of thicknesses equal or higher than 0,8 mm shall contain one hole. The minimum distance from the centre of a hole to the edge of the step, or to the edge of the second hole in
34、 that step, shall be the hole diameter plus 1 mm. The holes shall be perpendicular to the surface and shall not have a bevelled edge.4.1.3 DesignationThe written designation of an image quality indicator shall be labelled with the letters IQI, the number of this part of ISO 19232, the number of the
35、smallest hole as specified in Table 1 (e.g. H 5), and the symbol denoting the IQI material (e.g. FE).EXAMPLE IQI ISO 19232-2-H 5 FEIQIs with the designation EN 462-21are considered to be identical to IQIs with the designation ISO 19232-2.2 ISO 2013 All rights reservedBS EN ISO 19232-2:2013ISO 19232-
36、2:2013(E)Table 1 Hole numbers, hole diameters, step thicknesses, and tolerances of the range of IQIsDimensions in millimetresRange of image quality indicators Step/holeH 1 H 5 H 9 H 13 element (hole) numbernominal hole diameter and step thicknessnominal hole diameter and step thickness tolerances H
37、1 0,1250+ 0,015 H 2 0,160 H 3 0,200 H 4 0,250 H 5 0,320 H 6 0,400 H 7 0,500 H 8 0,6300+ 0,020 H 9 0,800 H 10 1,000 H 11 1,2500+ 0,025 H 12 1,600aH 13 2,000aH 14 2,500aH 15 3,2000+ 0,030aH 16 4,000aH 17 5,000aH 18 6,3000+ 0,036aThese values may be used for special applications by agreement between co
38、ntracting parties.4.2 MaterialAll parts of the IQI shall consist of the same material and shall be embedded in a protective covering material which shall not affect the image quality value.See Table 2 for usual IQI materials.4.3 MarkingThe marking applied on the IQI (see Figure 1) shall give the fol
39、lowing information:a) number of the smallest hole printed next to the smallest hole;b) letters identifying the IQI material used, e.g. FE;c) ISO letters.EXAMPLE H 5 FE ISOIQIs with the letters EN are considered to be identical to IQIs with the letters ISO.The radiographic image of the identification
40、 shall not cause glare when the radiograph is viewed. It is recommended that the absorption of the marking is not more than twice the absorption of the thickest step. ISO 2013 All rights reserved 3BS EN ISO 19232-2:2013ISO 19232-2:2013(E)4.4 Declaration of conformityEach IQI shall be delivered with
41、a declaration of conformity according to ISO/IEC 17050-1 which confirms that the IQI complies with this part of ISO 19232. For identification, the IQI shall be numbered and marked by the producer.5 Use of image quality indicators5.1 SelectionThe IQI shall be selected in accordance with the material
42、under test and its thicknesses.Whenever possible, the IQI shall be of the same type of material as the specimen under test. For other cases, see ISO 19232-4.Table 2 Types of IQI and material used for selected groups of materialsIQI marking Hole number from Table 1 IQI materialSuitable for testing of
43、 the following materialsH 1 CUH 5 CUH 9 CUH 13 CUH 1 to H 6H 5 to H 10H 9 to H 14H 13 to H 18Copper Copper, zinc, tin, and their alloysH 1 FEH 5 FEH 9 FEH 13 FEH 1 to H 6H 5 to H 10H 9 to H 14H 13 to H 18Steel (low alloyed) Ferrous materialsH 1 TIH 5 TIH 9 TIH 13 TIH 1 to H 6H 5 to H 10H 9 to H 14H
44、13 to H 18Titanium Titanium and its alloysH 1 ALH 5 ALH 9 ALH 13 ALH 1 to H 6H 5 to H 10H 9 to H 14H 13 to H 18Aluminium Aluminium and its alloys5.2 ArrangementWhen the radiograph is taken, the IQI shall be placed on the side of the section under test facing the source of radiation and remote from t
45、he 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 placed on the object, in
46、 an area where the thickness is as uniform as possible.Special arrangements are determined by application standards.4 ISO 2013 All rights reservedBS EN ISO 19232-2:2013ISO 19232-2:2013(E)6 Determination of image quality valueIn determining the image quality value, the conditions for viewing radiogra
47、phs specified in ISO 5580 shall be observed. 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 clearly visible.In general, the image quality value shall be determined for every radiogr
48、aph in radiographic examinations for which a verification of image quality is required.If steps have been taken to guarantee that radiographs of similar test objects and regions are produced with identical exposure and processing techniques and no differences in the image quality value are likely, t
49、he image quality need not be verified for every radiograph, the extent of image quality verification being subject to agreement between the contracting parties. ISO 2013 All rights reserved 5BS EN ISO 19232-2:2013ISO 19232-2:2013(E)Bibliography1 EN 462-2:1994, Non-destructive testing Image quality of radiographs Part 2: Image quality indicators (step/hole type) Determination of image quality value6 ISO 2013 All rights reservedBS EN ISO 19232-2:2013This page deliberately le
