1、July 2011 Translation by DIN-Sprachendienst.English price group 12No 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
2、3.040.10; 77.040.20!$sPV“1804551www.din.deDDIN EN ISO 10893-7Non-destructive testing of steel tubes Part 7: Digital radiographic testing of the weld seam of welded steeltubes for the detection of imperfections (ISO 10893-7:2011)English translation of DIN EN ISO 10893-7:2011-07Zerstrungsfreie Prfung
3、von Stahlrohren Teil 7: Digitale Durchstrahlungsprfung der Schweinaht geschweiter Stahlrohre zumNachweis von Unvollkommenheiten (ISO 10893-7:2011)Englische bersetzung von DIN EN ISO 10893-7:2011-07Essais non destructifs des tubes en acier Partie 7: Contrle radiographique numrique du cordon de soudur
4、e des tubes en aciersouds pour la dtection des imperfections (ISO 10893-7:2011)Traduction anglaise de DIN EN ISO 10893-7:2011-07www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.2407.11 DIN EN ISO 10893-7:2011-07 2 A comma is used as
5、 the decimal marker. National foreword This standard has been prepared by Technical Committee ISO/TC 17 “Steel” in collaboration with Technical Committee ECISS/TC 110 “Steel tubes, and iron and steel fittings” (Secretariat: UNI, Italy). The responsible German body involved in its preparation was the
6、 Normenausschuss Eisen und Stahl (Iron and Steel Standards Committee), Working Committee NA 021-00-09-06 UA Zerstrungsfreie Prfung von Rohren. There is no national standard on the subject. The English reference version contains an error in Tables 1 and 2, footnote b, that is corrected in the German
7、version as follows: English version: the smallest wires corrected German version: Das Drahtpaar mit den dicksten Drhten (the wire pair with the largest wire diameter) EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 10893-7 April 2011 ICS 23.040.10; 77.040.20; 77.140.75 English Version Non-d
8、estructive testing of steel tubes - Part 7: Digital radiographic testing of the weld seam of welded steel tubes for the detection of imperfections (ISO 10893-7:2011) Essais non destructifs des tubes en acier - Partie 7: Contrle radiographique numrique du cordon de soudure des tubes en acier souds po
9、ur la dtection des imperfections (ISO 10893-7:2011) Zerstrungsfreie Prfung von Stahlrohren - Teil 7: Digitale Durchstrahlungsprfung der Schweinaht geschweiter Stahlrohre zum Nachweis von Unvollkommenheiten (ISO 10893-7:2011) This European Standard was approved by CEN on 10 December 2010. CEN members
10、 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 application
11、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 Management
12、 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands,
13、 Norway, Poland, Portugal, 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
14、form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 10893-7:2011: EContents Page Foreword3 Introduction .5 1 Scope 6 2 Normative references 6 3 Terms and definitions .6 4 General requirements7 5 Equipment 7 6 Test method8 7 Image quality10 8 Image processing 15 9 Class
15、ification of indications.16 10 Acceptance limits 16 11 Acceptance.16 12 Image storage and display17 13 Test report 17 Annex A (informative) Examples of distribution of imperfections.19 Bibliography 22 DIN EN ISO 10893-7:2011-07 EN ISO 10893-7:2011 (E) 2 EN ISO 10893-7:2011 (E) 3 Foreword This docume
16、nt (EN ISO 10893-7:2011) has been prepared by Technical Committee ISO/TC 17 “Steel” in collaboration with Technical Committee ECISS/TC 110 “Steel tubes, and iron and steel fittings” the secretariat of which is held by UNI. This European Standard shall be given the status of a national standard, eith
17、er by publication of an identical text or by endorsement, at the latest by October 2011, and conflicting national standards shall be withdrawn at the latest by October 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/
18、or CENELEC shall not be held responsible for identifying any or all such patent rights. DIN EN ISO 10893 consists of the following parts, under the general title Non-destructive testing of steel tubes: Part 1: Automated electromagnetic testing of seamless and welded (except submerged arc-welded) ste
19、el tubes for the verification of hydraulic leaktightness Part 2: Automated eddy current testing of seamless and welded (except submerged arc-welded) steel tubes for the detection of imperfections Part 3: Automated full peripheral flux leakage testing of seamless and welded (except submerged arc-weld
20、ed) ferromagnetic steel tubes for the detection of longitudinal and/or transverse imperfections Part 4: Liquid penetrant inspection of seamless and welded steel tubes for the detection of surface imperfections Part 5: Magnetic particle inspection of seamless and welded ferromagnetic steel tubes for
21、the detection of surface imperfections Part 6: Radiographic testing of the weld seam of welded steel tubes for the detection of imperfections Part 7: Digital radiographic testing of the weld seam of welded steel tubes for the detection of imperfections Part 8: Automated ultrasonic testing of seamles
22、s and welded steel tubes for the detection of laminar imperfections Part 9: Automated ultrasonic testing for the detection of laminar imperfections in strip/plate used for the manufacture of welded steel tubes Part 10: Automated full peripheral ultrasonic testing of seamless and welded (except subme
23、rged arc-welded) steel tubes for the detection of longitudinal and/or transverse imperfections Part 11: Automated ultrasonic testing of the weld seam of welded steel tubes for the detection of longitudinal and/or transverse imperfections Part 12: Automated full peripheral ultrasonic thickness testin
24、g of seamless and welded (except submerged arc-welded) steel tubes DIN EN ISO 10893-7:2011-07 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,
25、 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 10893
26、-7:2011 has been approved by CEN as a EN ISO 10893-7:2011 without any modification. DIN EN ISO 10893-7:2011-07 EN ISO 10893-7:2011 (E) 4 Introduction Digital radiography has been used for the testing of longitudinal weld seams in submerged arc-welded steel tubes for some years. Digital radiography c
27、an be automated, and is considered to be more environmentally friendly than film-based radiographic techniques. Digital radiography maintains the levels of security and availability afforded by X-ray film testing, which have been in place for many years. Images can be made available in a fraction of
28、 the time previously taken by film-based techniques, and usually at a lower exposure level and increased detector unsharpness when compared to film. The storage and handling of digital images maintain the same levels of integrity available from film-based techniques, yet gain all the benefits associ
29、ated with comprehensive data storage and retrieval systems. Imaging systems are constantly under development, and an important aspect of this part of ISO 10893 is to qualify the use of those alternative systems currently available. This part of ISO 10893 describes the steps required to deliver these
30、 benefits. DIN EN ISO 10893-7:2011-07 EN ISO 10893-7:2011 (E) 5 1 Scope This part of ISO 10893 specifies the requirements for digital radiographic X-ray testing by either computed radiography (CR) or radiography with digital detector arrays (DDA) of the longitudinal or helical weld seams of automati
31、c fusion arc-welded steel tubes for the detection of imperfections. This part of ISO 10893 specifies acceptance levels and calibration procedures. This part of ISO 10893 can also be applicable to the testing of circular hollow sections. 2 Normative references The following referenced documents are i
32、ndispensable 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 5576, Non-destructive testing Industrial X-ray and gamma-ray radiology Vocabulary ISO
33、 9712, Non-destructive testing Qualification and certification of personnel ISO 11484, Steel products Employers qualification system for non-destructive testing (NDT) personnel ISO 17636, Non-destructive testing of welds Radiographic testing of fusion-welded joints ISO 19232-1, Non-destructive testi
34、ng Image quality of radiographs Part 1: Image quality indicators (wire type) Determination of image quality value ISO 19232-2, Non-destructive testing Image quality of radiographs Part 2: Image quality indicators (step/hole type) Determination of image quality value ISO 19232-5, Non-destructive test
35、ing Image quality of radiographs Part 5: Image quality indicators (duplex wire type) Determination of image unsharpness value 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 5576 and ISO 11484 and the following apply. 3.1 tube hollow long product ope
36、n at both ends, of any cross-sectional shape 3.2 welded tube tube made by forming a hollow profile from a flat product and welding adjacent edges together, and which after welding can be further processed, either hot or cold, into its final dimensions 6 DIN EN ISO 10893-7:2011-07 EN ISO 10893-7:2011
37、 (E) 3.3 manufacturer organization that manufactures products in accordance with the relevant standard(s) and declares the compliance of the delivered products with all applicable provisions of the relevant standard(s) 3.4 agreement contractual arrangement between the manufacturer and purchaser at t
38、he time of enquiry and order 4 General requirements 4.1 Unless otherwise specified by the product standard or agreed on by the purchaser and manufacturer, a radiographic inspection inspection shall be carried out on welded tubes after completion of all the primary manufacturing process operations (r
39、olling, heat treating, cold and hot working, sizing and primary straightening, etc.). 4.2 This inspection shall be carried out by trained operators qualified in accordance with ISO 9712, ISO 11484 or equivalent. Competent personnel, nominated by the manufacturer, shall supervise all inspection. In t
40、he case of third-party inspection, this shall be agreed on between the purchaser and manufacturer. The operating authorization issued by the employer shall be according to a written procedure. Non-destructive testing (NDT) operations shall be authorized by a level 3 NDT individual approved by the em
41、ployer. NOTE The definition of levels 1, 2 and 3 can be found in appropriate standards, e.g. ISO 9712 and ISO 11484. 4.3 The tubes under test shall be sufficiently straight and free of foreign matter as to ensure the validity of the test. The surfaces of the weld seam and adjacent parent metal shall
42、 be sufficiently free of such foreign matter and surface irregularities which would interfere with the interpretation of the radiographs. Surface grinding is permitted in order to achieve an acceptable surface finish. 4.4 In cases where the weld reinforcement is removed, markers, usually in the form
43、 of lead arrows, shall be placed on each side of the weld such that its position can be identified on the radiographic image. Alternatively, an integrated automatic positioning system may be used to identify the position of the weld. 4.5 Identification symbols, usually in the form of lead letters, s
44、hall be placed on each section of the weld seam radiograph such that the projection of these symbols appears in each radiographic image to ensure unequivocal identification of the section. Alternatively, an integrated automatic positioning system may be used to identify the position of each radiogra
45、phic image along the pipe weld. 4.6 Markings shall be displayed on the recorded radiographic images to provide reference points for the accurate relocation of the position of each radiograph. Alternatively, the automated measured image position may be displayed on the digital image viewing screen by
46、 software for accurate position relocation. 4.7 When carrying out radiography on a continuous length of a weld, the pipe or pipe wall shall pass between the X-ray tube and detector at a speed which is sufficient to allow accurate defect detection, or the pipe shall move in start-stop mode and digita
47、l radiographs shall be taken when the pipe is not moving. 5 Equipment The following digital imaging methods can be used in replacement of radiographic film: a) computed radiography (CR) with storage phosphor imaging plates (e.g. EN 14784-1 and EN 14784-2); b) radiology with digital detector arrays (
48、e.g. ASTM E2597); c) digital radioscopy with image integration (e.g. EN 13068-1, EN 13068-2 and EN 13068-3). 7 DIN EN ISO 10893-7:2011-07 EN ISO 10893-7:2011 (E) 6 Test method 6.1 The weld seam shall be tested by a digital radiographic technique, corresponding to 5 a) to 5 c). 6.2 Two image quality
49、classes, A and B, conforming to ISO 17636, shall be specified as: class A: radiographic examination technique with standard sensitivity; class B: radiographic technique with enhanced sensitivity. NOTE Image quality class A is used for most applications. Image quality class B is intended for applications where increased sensitivity is required to reveal all the imperfections being detected. The required image quality class should be stated in the relevant product standard. 6.3 The digital image displa
