DIN EN ISO 11699-2-2012 Non-destructive testing - Industrial radiographic films - Part 2 Control of film processing by means of reference values (ISO 11699-2 1998) German version E.pdf

1、January 2012 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).IC

2、S 37.040.25!$y,q“1860978www.din.deDDIN EN ISO 11699-2Non-destructive testing Industrial radiographic films Part 2: Control of film processing by means of reference values(ISO 11699-2:1998)English translation of DIN EN ISO 11699-2:2012-01Zerstrungsfreie Prfung Industrielle Filme fr die Durchstrahlung

3、sprfung Teil 2: Kontrolle der Filmverarbeitung mit Hilfe von Referenzwerten (ISO 11699-2:1998)Englische bersetzung von DIN EN ISO 11699-2:2012-01Essais non destructifs Films utiliss en radiographie industrielle Partie 2: Contrle du traitement des films au moyen de valeurs de rfrence(ISO 11699-2:1998

4、)Traduction anglaise de DIN EN ISO 11699-2:2012-01SupersedesDIN EN 584-2:1997-01www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.1501.12 DIN EN ISO 11699-2:2012-01 2 A comma is used as the decimal marker. National foreword This stan

5、dard has been prepared by Technical Committee ISO/TC 135 “Non-destructive testing” and has been taken over as EN ISO 11699-2:2011 by Technical Committee CEN/TC 138 “Non-destructive testing” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was the Normenausschuss

6、Materialprfung (Materials Testing Standards Committee), Working Committee NA 062-08-22 AA Durchstrahlungsprfung und Strahlenschutz. EN ISO 11699 consists of the following parts under the general title Non-destructive testing Industrial radiographic films: Part 1: Classification of film systems for i

7、ndustrial radiography Part 2: Control of film processing by means of reference values The DIN Standard corresponding to the International Standard referred to in this document is as follows: ISO 11699-1 DIN EN ISO 11699-1 Amendments This standard differs from DIN EN 584-2:1997-01 as follows: a) the

8、text of ISO 11699-2:1998 has been adopted without any modification; b) the standard has been editorially revised. Previous editions DIN EN 584-2: 1997-01 National Annex NA (informative) Bibliography DIN EN ISO 11699-1, Non-destructive testing Industrial radiographic films Part 1: Classification of f

9、ilm systems for industrial radiography EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11699-2 October 2011 ICS 37.040.25 Supersedes EN 584-2:1996English Version Non-destructive testing - Industrial radiographic films - Part 2: Control of film processing by means of reference values (ISO 11

10、699-2:1998) Essais non destructifs - Films utiliss en radiographie industrielle - Partie 2: Contrle du traitement des films au moyen de valeurs de rfrence (ISO 11699-2:1998) Zerstrungsfreie Prfung - Industrielle Filme fr die Durchstrahlungsprfung - Teil 2: Kontrolle der Filmverarbeitung mit Hilfe vo

11、n Referenzwerten (ISO 11699-2:1998) This European Standard was approved by CEN on 25 September 2011. 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

12、-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 Standard exists in three official versions (English, French, German). A version in any other language made by trans

13、lation 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 the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finlan

14、d, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOM

15、ITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 11699-2:2011: EContents Page Foreword 3 Introduction .4 1 Scope 5 2 Normative reference .5 3 Definitions

16、5 4 Manufacturing of pre-exposed film strips for control of the processing system 5 5 User verification of compliance with a classified film system .9 6 Interpretation of results 10 7 Checking intervals . 11 8 Test report 11 9 Compliance with film system classification . 11 Annex A (normative) Metho

17、d for processing control 12 EN ISO 11699-2:2011 (E) DIN EN ISO 11699-2:2012-01 2 Foreword The text of ISO 11699-2:1998 has been prepared by Technical Committee ISO/TC 135 “Non-destructive testing” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 11699-2:2

18、011 by 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 April 2012, and conflicting national stan

19、dards shall be withdrawn at the latest by April 2012. 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 584-

20、2:1996. 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, France, Germany, Greece, Hungary, Iceland,

21、 Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 11699-2:1998 has been approved by CEN as a EN ISO 11699-2:2011 without any modification. EN

22、 ISO 11699-2:2011 (E) DIN EN ISO 11699-2:2012-01 3 IntroductionThis part of ISO 11699 describes a procedure for the control of the filmprocessing systems by users by processing calibrated pre-exposed strips.The strips are exposed to X-rays and are accompanied by a certificate from thefilm strip manu

23、facturer.The user processes the pre-exposed strips in his system and records the results.In this part of ISO 11699, clause 4 shows the responsibility of the film stripmanufacturer. The user is responsible for clauses 5 to 8, which show compliancewith the chosen system classification.EN ISO 11699-2:2

24、011 (E) DIN EN ISO 11699-2:2012-01 4 1 ScopeThis part of ISO 11699 describes a procedure for the control of film processing systems.2 Normative referenceThe following standard contains provisions which, through reference in this text, constitute provisions of this part ofISO 11699. At the time of pu

25、blication, the edition indicated was valid. All standards are subject to revision, and parties toagreements based on this part of ISO 11699 are encouraged to investigate the possibility of applying the most recentedition of the standard indicated below. Members of IEC and ISO maintain registers of c

26、urrently valid InternationalStandards.ISO 11699-1:1998, Non-destructive testing Industrial radiographic films Part 1: Classification of film systems forindustrial radiography.3 DefinitionsFor the purposes of this part of ISO 11699, the following definitions apply.3.1 film system: Combination of film

27、 and film processing which is carried ou in accorcance with the instructions of filmmanufacturer and/or the manufacturer of the processing chemicals ISO 11699-1.3.2 film system class: Film system classification according to the limiting values given in table 1 of ISO 11699-1:1998.3.3 film strip: Pie

28、ce of film material on which a step wedge can be exposed.3.4 pre-exposed film strip: Film strip that is pre-exposed so as to present at least ten different densities after processing.3.5 net density: Optical density without base and fog density.4 Manufacturing of pre-exposed film strips for control

29、of the processing system4.1 SizeThe film strips shall have a minimum exposed area of 15 mm 100 mm. The pre-exposed film strips contain a step wedgefor density measurements and a blank area for base plus fog density and long term storage time test.EN ISO 11699-2:2011 (E) DIN EN ISO 11699-2:2012-01 5

30、4.2 Selection of film strip typeThe selected type of film used for the film strips shall have a response to processing which is representative for the set offilms which are classified according to ISO 11699-1.4.3 Examples of production of pre-exposed film stripsThe exposure arrangement is shown in f

31、igure 1. The step wedge design is described in figure 2 and table 1. A differentdesign and material can be used if it provides the same density steps.Dimensions in millimetersKey1 Source2 3 mm thick copper prefilter3 Wedge4 FilmFigure 1 Example of an exposure arrangementThe successive steps of the f

32、ilm strip shall be exposed in order to obtain density increments of about 0,3 after processing, forexample by a step wedge as described in table 1 and figure 2.Appropriate precautions against scattered radiation shall be taken. The radiation source is a constant potential X-ray tubeoperated at appro

33、ximately 150 kV. The exposure time is chosen in this way so as to obtain a net density of approximately 2at one of the first six steps (going from low to high densities) of the step/wedge after processing the pre-exposed film strip inthe conditions of the system classified according to ISO 11699-1.E

34、N ISO 11699-2:2011 (E) DIN EN ISO 11699-2:2012-01 6 Figure 2 Design of step wedgeTable 1 Height of steps;material: fine-grained copperStepNo.Height for 150 KVmm1234567891011,710,810,09,38,88,27,77,36,96,54.4 Measurement fields and determination of reference valuesThe steps for determination of refer

35、ence values shall be as follows (see figure 3):Step X: the step with a net density close to D = 2.Step X + 4: the step with a higher density which is four steps from X.To obtain the reference values, at least five pre-exposed film strips shall be processed in a classified film system. Theresulting d

36、ensities shall have a maximum variance of DD = 0,1.EN ISO 11699-2:2011 (E) DIN EN ISO 11699-2:2012-01 7 The reference values are obtained as follows: Reference speed index Sr:The average value of the net densities of step X is calculated. The speed index reference is equal to this averagevalue, roun

37、ded to one decimal. Reference contrast index Cr:The average value of the net densities of step X + 4 is calculated. The reference contrast index reference is thepositive difference of the average densities of the steps X and X + 4, rounded to one decimal place.Dimensions in millimetersNOTE Position

38、and density of steps X and X + 4 on the strip may vary.Figure 3 Example of test strip4.5 Pre-exposed film strip-certificatePre-exposed strips shall always be accompanied by a certificate from the manufacturer containing the following data: a description of the processing system, specifying the proce

39、ssor, chemistry, processing cycle and the temperature; the brand name and type of the pre-exposed film strip; the reference values for speed index and contrast index and the step numbers for calculating the corresponding indices.The following data shall be displayed as shown: Processing: manual or a

40、utomatic; developer type and immersion time; developing temperature; fixer type and immersion time; fixing temperature. Test strip: brand name; type.EN ISO 11699-2:2011 (E) DIN EN ISO 11699-2:2012-01 8 Speed index: reference speed index (Sr); reference step (X). Contrast index: reference contrast in

41、dex (Cr); reference contrast step (X + 4).4.6 Storage of pre-exposed film stripsPre-exposed film strips shall be stored in a cool and dry place. The manufacturer shall state a date of expiry and the storageconditions.5 User verification of compliance with a classified film systemFor testing complian

42、ce with a classified film system, the same brand of pre-exposed film and film of the film system underverification shall be used.If the reference value cannot be achieved at the time of installation of the processing system, the temperature of thedeveloper may be adjusted by 2 K from the temperature

43、 which was specified in the pre-exposed film strip-certificateaccording to 4.5.5.1 Processing conditions5.1.1 Automatic processingThe automatic processor shall be set and maintained according to the recommendation of the manufacturer. To avoid initialtransient changes of processing quality, start-up

44、 procedures as recommended by the manufacturer shall be followed beforedeveloping of the pre-exposed film strips. If the automatic processor is running continuously, pre-exposed film strips may beprocessed without further conditioning.5.1.2 Manual processingThe processing chemicals shall be mixed, r

45、eplenished and temperature-controlled according to the specified film systemclassification and the recommendations of the film manufacturer.5.2 Processing of pre-exposed film stripsTo achieve good transport through the automatic processor, the recommendations of the manufacturer, covering processing

46、and transport of small sized films, shall be followed.5.3 Evaluation of the pre-exposed film strips5.3.1 Calibration of densitometerFor density measurements, a densitometer with a minimum density range from D = 0 to D = 4 shall be used.The densitometer shall be calibrated using a reference wedge. Th

47、e densitometer shall be considered calibrated, when themeasured densities of the reference wedge match the specified densities to within 0,1.EN ISO 11699-2:2011 (E) DIN EN ISO 11699-2:2012-01 9 5.3.2 Parameters for processing system evaluationThe parameters for evaluation of the processing system ar

48、e obtained as follows: Cx: contrast index: This is the difference between density Dx + 4of step X + 4 and the density Dxof step Xnormalized to a reference speed index Sr, to eliminate speed influences. To calculate thecontrast index Cx, the following formula is used:x x+4 xrxC = DDSS() . . . (1) D0: density of step 0 Dx: density of step X Sx: speed index Dx D05.3.3 Control of fixing and washingThe achieved quality of processed film depends partly on the presence of resi