1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 10893-7:2011Non-destructive testing of steeltubesPart 7: Digital radiographic testing ofthe weld seam of welded steel tubesfor the detection of imperfections (ISO10893-
2、7:2011)BS EN ISO 10893-7:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO10893-7:2011.The UK participation in its preparation was entrusted to TechnicalCommittee ISE/110, Steel Tubes, and Iron and Steel Fittings.A list of organizations represented on thi
3、s committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 59035 1ICS 23.040.10; 25.160.40; 77.040.20; 77.140.75Compliance with a British Stand
4、ard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 April 2011.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 10893-7 April 2011 ICS
5、 23.040.10; 77.040.20; 77.140.75 English Version Non-destructive 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 num
6、rique du cordon de soudure des tubes en acier souds pour 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 Standar
7、d was approved by CEN on 10 December 2010. 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-to-date lists and bibliographical references concerning s
8、uch 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 translation under the responsibility of a CEN member into its o
9、wn 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, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Ita
10、ly, 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 KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-100
11、0 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 10893-7:2011: EBS EN ISO 10893-7:2011EN ISO 10893-7:2011 (E) 3 Foreword This document (EN ISO 10893-7:2011) has been prepared by Technical Committee ISO/TC 17 “Ste
12、el“ 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, either by publication of an identical text or by endorsement, at the latest by Octob
13、er 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/or CENELEC shall not be held responsible for identifying any or all such patent
14、rights. 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,
15、 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 10893-7:2011 has been approved by CEN as a EN ISO 10893-7:2011 without any modification. BS
16、 EN ISO 10893-7:2011ISO 10893-7:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and definitions .1 4 General requirements .2 5 Equipment 2 6 Test method .3 7 Image quality5 8 Image processing10 9 Classification of indications.
17、11 10 Acceptance limits11 11 Acceptance 11 12 Image storage and display .12 13 Test report12 Annex A (informative) Examples of distribution of imperfections.14 Bibliography17 BS EN ISO 10893-7:2011ISO 10893-7:2011(E) iv ISO 2011 All rights reservedForeword ISO (the International Organization for Sta
18、ndardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International 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 righ
19、t to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International
20、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 International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an
21、 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 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 1
22、0893-7 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 19, Technical delivery conditions for steel tubes for pressure purposes. ISO 10893 consists of the following parts, under the general title Non-destructive testing of steel tubes: Part 1: Automated electromagnetic testing o
23、f seamless and welded (except submerged arc-welded) steel 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 te
24、sting of seamless and welded (except submerged arc-welded) 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 inspectio
25、n of seamless and welded ferromagnetic steel tubes for 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 imperf
26、ections Part 8: Automated ultrasonic testing of seamless 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
27、ultrasonic testing of seamless and welded (except submerged 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
28、: Automated full peripheral ultrasonic thickness testing of seamless and welded (except submerged arc-welded) steel tubes BS EN ISO 10893-7:2011ISO 10893-7:2011(E) ISO 2011 All rights reserved vIntroduction Digital radiography has been used for the testing of longitudinal weld seams in submerged arc
29、-welded steel tubes for some years. Digital radiography can 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
30、many years. Images can be made available in a fraction of 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 fro
31、m film-based techniques, yet gain all the benefits associated 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 o
32、f ISO 10893 describes the steps required to deliver these benefits. BS EN ISO 10893-7:2011BS EN ISO 10893-7:2011INTERNATIONAL STANDARD ISO 10893-7:2011(E) ISO 2011 All rights reserved 1Non-destructive testing of steel tubes Part 7: Digital radiographic testing of the weld seam of welded steel tubes
33、for the detection of imperfections 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 automatic fusion arc-welded steel tub
34、es 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 indispensable for the applicat
35、ion 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 9712, Non-destructive testin
36、g 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 testing Image quality of radiograp
37、hs 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 testing Image quality of radiogra
38、phs 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 open at both ends, of any cross-
39、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 BS EN ISO 10893-7:2011ISO 10893-7:2011(E) 2 ISO 2011 All rights reserved3.3 m
40、anufacturer 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 the time of
41、 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 (rolling, he
42、at 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 the case of
43、 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 employer. NO
44、TE 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 be suffic
45、iently 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 of lead a
46、rrows, 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, shall be pl
47、aced 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 radiographic image
48、 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 software
49、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 digital 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
