DIN EN ISO 11699-1-2012 Non-destructive testing - Industrial radiographic films - Part 1 Classification of film systems for industrial radiography (ISO 11699-1 2008) German version.pdf

1、January 2012 Translation by DIN-Sprachendienst.English price group 9No 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).ICS

2、 37.040.25!$y,o“1860976www.din.deDDIN EN ISO 11699-1Non-destructive testing Industrial radiographic films Part 1: Classification of film systems for industrial radiography(ISO 11699-1:2008)English translation of DIN EN ISO 11699-1:2012-01Zerstrungsfreie Prfung Industrielle Filme fr die Durchstrahlun

3、gsprfung Teil 1: Klassifizierung von Filmsystemen fr die industrielle Durchstrahlungsprfung(ISO 11699-1:2008)Englische bersetzung von DIN EN ISO 11699-1:2012-01Essais non destructifs Film pour radiographie industrielle Partie 1: Classification des systmes films pour radiographie industrielle(ISO 116

4、99-1:2008)Traduction anglaise de DIN EN ISO 11699-1:2012-01SupersedesDIN EN 584-1:2006-07www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.1401.12 DIN EN ISO 11699-1:2012-01 2 A comma is used as the decimal marker. National foreword

5、This standard has been prepared by Technical Committee ISO/TC 135 “Non-destructive testing” and has been taken over as EN ISO 11699-1:2011 by Technical Committee CEN/TC 138 “Non-destructive testing” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was the Normena

6、usschuss 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 syst

7、ems for industrial radiography Part 2: Control of film processing by means of reference values The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 11699-2 DIN EN ISO 11699-2 ISO/IEC 17025 DIN EN ISO/IEC 17025 Amendments This standard differ

8、s from DIN EN 584-1:2006-07 as follows: a) the text of ISO 11699-1:2008 has been adopted without any modification; b) the standard has been editorially revised. Previous editions DIN EN 584-1: 1994-10, 2006-07 National Annex NA (informative) Bibliography DIN EN ISO 11699-2, Non-destructive testing I

9、ndustrial radiographic films Part 2: Control of film processing by means of reference values DIN EN ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11699-1 October 2011 ICS 37.040.25 Supersedes EN

10、 584-1:2006English Version Non-destructive testing - Industrial radiographic film - Part 1: Classification of film systems for industrial radiography (ISO 11699-1:2008) Essais non destructifs - Film pour radiographie industrielle -Partie 1: Classification des systmes films pour radiographie industri

11、elle (ISO 11699-1:2008) Zerstrungsfreie Prfung - Industrielle Filme fr die Durchstrahlungsprfung - Teil 1: Klassifizierung von Filmsystemen fr die industrielle Durchstrahlungsprfung (ISO 11699-1:2008) This European Standard was approved by CEN on 25 September 2011. CEN members are bound to comply wi

12、th 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 Mana

13、gement 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 st

14、atus as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portug

15、al, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means r

16、eserved worldwide for CEN national Members. Ref. No. EN ISO 11699-1:2011: EContents DIN EN ISO 11699-1:2012-01 EN ISO 11699-1:2011 (E) 2 Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Sampling and storage .5 5 Test method 6 5.1 Preparation .6 5.2 Measurement of gradi

17、ent G 6 5.3 Measurement of granularity D7 5.4 Measurement of ISO speed S 8 5.5 Other equipment and procedures 9 6 Limiting values for classification .9 Bibliography . 12 Foreword The text of ISO 11699-1:2008 has been prepared by Technical Committee ISO/TC 135 “Non-destructive testing” of the Interna

18、tional Organization for Standardization (ISO) and has been taken over as EN ISO 11699-1:2011 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 ide

19、ntical text or by endorsement, at the latest by April 2012, and conflicting national standards 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 re

20、sponsible for identifying any or all such patent rights. This document supersedes EN 584-1:2006. 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, Cypr

21、us, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, 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 11

22、699-1:2008 has been approved by CEN as a EN ISO 11699-1:2011 without any modification. DIN EN ISO 11699-1:2012-01 EN ISO 11699-1:2011 (E) 3 1 Scope The purpose of this part of ISO 11699 is to establish the performance of film systems. This part of ISO 11699 is applicable for the classification of fi

23、lm systems in combination with specified lead screens for industrial radiography (non-destructive testing). This part of ISO 11699 is intended to ensure that the image quality of radiographs as far as this is influenced by the film system is in conformity with the requirements of International Stand

24、ards such as ISO 5579, ISO 17636 and EN 12681. This part of ISO 11699 does not apply to the classification of films used with fluorescent intensifying screens. The measurement of film systems in this part of ISO 11699 is restricted to a selected radiation quality to simplify the procedure. The prope

25、rties of films will change with radiation energy, but not the ranking of film system quality. Additional methods for evaluating the photographic process are described in ISO 11699-2, by which the performance of film systems can be controlled under the conditions given in industry. 2 Normative refere

26、nces The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 11699-2, Non-destructive testing Industr

27、ial radiographic films Part 2: Control of film processing by means of reference values ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 film system

28、combination of film and film processing which is carried out in accordance with the instructions of the film manufacturer and/or the manufacturer of the processing chemicals 3.2 film gradient G slope of the characteristic curve of a film at a specified optical density D DIN EN ISO 11699-1:2012-01 EN

29、 ISO 11699-1:2011 (E) 4 3.3 granularity Dstochastic density fluctuations in the radiograph, superimposed on the image of the object NOTE The limiting values given in this part of ISO 11699 are related to fixed radiation energies and specified screens. 3.4 characteristic curve curve showing the relat

30、ionship between the common logarithm of exposure log K, and the optical density D 3.5 specular density quantitative measure of film blackening (optical density) when light passing the optics of a microdensitometer transmits the film 3.6 diffuse density quantitative measure of film blackening (optica

31、l density) as determined by a densitometer NOTE It is the sum of all transmitted and scattered light into the half sphere behind the film. 3.7 signal/noise ratio industrial radiography ratio of a local film density to the granularity Dat this density level NOTE It is correlated to the gradient/noise

32、 ratio. 3.8 ISO speed S reciprocal value of the dose, Ks, expressed in Gy, which results in a specified diffuse optical transmission density ()02DD= on the processed film, where D0is the fog and base density: s1SK= (1) 3.9 film system class classification which takes account of limiting values given

33、 in Table 1 3.10 gradient/noise ratio G/Dratio of the gradient, G, and the granularity DNOTE It relates directly to the signal/noise ratio. All further parameters determining the signal, such as the modulation transfer function or the energy of the radiation, are considered to be constant. 4 Samplin

34、g and storage For product specification, it is important that the samples evaluated yield the average results obtained by users. This will require the evaluation of several different batches periodically under conditions specified in this part of ISO 11699. Prior to evaluation, the samples shall be

35、stored in accordance with the manufacturers recommendations for a length of time, in order to simulate the average age at which the product is normally used. The basic objective in selecting and storing samples as described above is to ensure that the film characteristics are representative of those

36、 obtained by a consumer at the time of use. DIN EN ISO 11699-1:2012-01 EN ISO 11699-1:2011 (E) 5 5 Test method 5.1 Preparation The film samples shall be exposed to X-rays from tungsten target tubes. Inherent filtration of the tube, together with an additional copper filter located as close to the X-

37、ray tube target as possible, shall provide filtration equivalent to (8,00 0,05) mm of copper. The potential across the X-ray tube shall be adjusted until the half-value-absorption is obtained with (3,5 0,2) mm of copper. A potential of approximately 220 kV generally meets this requirement. The film

38、system shall include a front and a back screen of 0,02 mm to 0,04 mm lead. If single coated films are used, the emulsion coated surface shall face the X-ray tube. Good film screen contact shall be ensured. Exercise care to ensure that the film specimen does not contain density variations arising fro

39、m the exposing equipment (such as non-uniform beam filters or damaged, or defective lead screens) or processing system. During and after exposure, prior to processing, maintain the film specimen at the temperature of (23 5) C and relative humidity of (50 20) %. The film processing chemicals and proc

40、edures shall be the same for determining gradient and granularity, and they shall be used and described completely as specified. Use manufacturer certified film test strips in accordance with ISO 11699-2 to test the specified developer system with the specified immersion time and developer temperatu

41、re. The speed index Sxshall be within 5 % of the manufacturers certificate. The developer temperature may differ by 1 C from the certified value to adjust Sxwithin 5 % of the manufacturer certificate value. The obtained Sxand used developer temperature shall be documented in the test report. This te

42、st shall be done, on a daily basis, before and after the development of the exposed films for classification with the same developer temperature and immersion time. If a manufacturer certificate is not available, film test strips shall be manufactured and calibrated in accordance with ISO 11699-2 by

43、 the user. 5.2 Measurement of gradient G Gradient G relates to a D versus log10K curve. Within the scope of this part of ISO 11699, G is calculated from the slope ddDKof a D versus K curve at density 0()D D , i.e. 10 10dddlog log e dD KDGK K= (2) where K is the measured dose, expressed in Gy, requir

44、ed for density 0();DD D0is the measured optical density of an unexposed and processed film including base (fog and base density). The D versus K curve is approximated by a polynomial of third order. To obtain a reliable curve, a series of exposures are made with the same film sample to obtain at lea

45、st 12 uniformly distributed measuring points covering at least density 1,0 and 4,5 above D0. The polynomial approximation shall include all measured values between 1,0 and 4,5. For the numerical approximation (fit procedure) no zero value shall be included. At least six gradient measurements shall b

46、e made on different film samples to determine the mean gradient value G. The densitometer used shall be calibrated regularly up to a diffuse density of D W 4,8. For the calibration, a certified film step tablet shall be used. This shall be generated from double sided X-ray film of C3 class or higher

47、 (C1 or C2). NOTE Densitometers can have limited accuracy for measurements at D 4 and need careful calibration correction in the full range. Small deviations of the density values at D 4 have considerable influence on the accuracy of the value of G at ()04DD= due to the properties of the polynomial

48、approximation procedure. DIN EN ISO 11699-1:2012-01 EN ISO 11699-1:2011 (E) 6 The mean gradient values shall be determined with a maximum uncertainty of 5 % for the gradient at 2D = above fog and base (G2) at a confidence level of 95 % and 7 % for the gradient at 4D = above fog and base (G4) at a confidence level of 95 %. Measurement laboratories, which certify film systems, shall participate in a proficiency test on a periodical basis. A new film, exposed in accordance with this part of