ISO TS 11774-2011 Non-destructive testing - Performance-based qualification《无损探伤 性能鉴定》.pdf

1、 Reference number ISO/TS 11774:2011(E) ISO 2011TECHNICAL SPECIFICATION ISO/TS 11774 First edition 2011-11-01 Non-destructive testing Performance- based qualification Essais non destructifs Qualification sur une base de performances ISO/TS 11774:2011(E) COPYRIGHT PROTECTED DOCUMENT ISO 2011 All right

2、s reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the

3、requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2011 All rights reservedISO/TS 11774:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv Introduction .

4、 v 1 Scope 1 2 Normative references 1 3 Terms and definitions . 1 4 Responsibilities . 3 4.1 Qualification body . 3 4.2 Employer 3 4.3 Industry sector committee . 3 5 Qualification of the NDT procedure . 3 6 Prerequisites for performance-based qualification examinations . 3 7 Performance-based quali

5、fication examination 3 7.1 Qualification specimens . 3 7.2 Assembly of the specimens . 4 7.3 Administration and grading of examinations . 4 8 Post-qualification requirements 5 8.1 Continuing practice . 5 8.2 Periodic performance demonstration . 5 9 Validity 5 10 Records and documentation 5 Annex A (

6、normative) Non-destructive testing procedure qualification 7 Bibliography 11 ISO/TS 11774:2011(E) iv ISO 2011 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Interna

7、tional 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 right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with

8、ISO, also take part in the work. ISO 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

9、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 International Standard requires approval by at least 75 % of the member bodies casting a vote. In other circumstances,

10、 particularly when there is an urgent market requirement for such documents, a technical committee may decide to publish other types of document: an ISO Publicly Available Specification (ISO/PAS) represents an agreement between technical experts in an ISO working group and is accepted for publicatio

11、n if it is approved by more than 50 % of the members of the parent committee casting a vote; an ISO Technical Specification (ISO/TS) represents an agreement between the members of a technical committee and is accepted for publication if it is approved by 2/3 of the members of the committee casting a

12、 vote. An ISO/PAS or ISO/TS is reviewed after three years in order to decide whether it will be confirmed for a further three years, revised to become an International Standard, or withdrawn. If the ISO/PAS or ISO/TS is confirmed, it is reviewed again after a further three years, at which time it mu

13、st either be transformed into an International Standard or be withdrawn. 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/TS 11774 was prepared by

14、 Technical Committee ISO/TC 135, Non-destructive testing, Subcommittee SC 7, Personnel qualification. ISO/TS 11774:2011(E) ISO 2011 All rights reserved vIntroduction Performance demonstration establishes the ability of a specific examination system (i.e. equipment, procedures and personnel) to achie

15、ve a desirable level of performance. The pre-established criteria for acceptable performance are based on an industry obtaining desired test results on qualification specimens with or without discontinuities including an established acceptable false call rate using qualified procedures and equipment

16、. NOTE Wherever gender specific words such as “his”, “her”, “he” or “she” appear in this Technical Specification the other gender is also applicable. TECHNICAL SPECIFICATION ISO/TS 11774:2011(E) ISO 2011 All rights reserved 1Non-destructive testing Performance-based qualification 1 Scope This Techni

17、cal Specification provides a method for qualification of non-destructive testing (NDT) personnel, procedures, and equipment for specific non-destructive tests conducted in accordance with documented procedures established within a performance-based qualification programme. Implementation of this Tec

18、hnical Specification requires cooperation between applicable industry sector committees (ISCs) and qualification bodies to ensure that specific performance expectations are addressed. The qualification methodology described in this Technical Specification is based upon the ability of a candidate to

19、demonstrate capability in detecting and sizing critical discontinuities equivalent to those to be detected and sized in the performance-based qualification programme as established by the ISC. It is possible that second party (employer-based) qualification and approval (e.g. in accordance with ANSI/

20、ASNT CP-189 3 ) or qualification and third party certification (e.g. in accordance with ISO 9712 1or EN 473 2 ), followed by on-the-job training does not provide the required degree of confidence for safety critical inspections, and this Technical Specification provides criteria to assist in prepari

21、ng an individual for performance-based qualification examinations. Qualification to this Technical Specification is limited to the specific applications, using the specific documented procedure in the performance-based qualification programme. 2 Normative references The following referenced document

22、s 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/IEC 17024, Conformity assessment General requirements for bodies operating cer

23、tification of persons 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 candidate individual seeking qualification under a qualification procedure who has satisfied all prerequisites detailed in the qualification document NOTE The qualification

24、 document is a description of the qualification system, including all applicable conditions, agreed between the parties to the qualification. 3.2 certification body body that administers procedures for certification according to the requirements of this Technical Specification and which fulfils the

25、requirements of ISO/IEC 17024 ISO/TS 11774:2011(E) 2 ISO 2011 All rights reserved3.3 employer legal entity for which the candidate for qualification or the qualified individual works on a regular basis 3.4 essential parameter parameter of the NDT method, technique, the component, and defects that th

26、e test is intended to detect or characterize 3.5 false call reporting a defect when none exists 3.6 grading unit section of a qualification specimen NOTE Grading units can be of unequal lengths and spacing, and either with or without discontinuities. 3.7 industry sector committee ISC body comprised

27、of individuals representative of the interests in the inspection to be qualified 3.8 NDT qualification examiner impartial individual who is certified to NDT level 3 within a scheme recognized by the qualification body, and who is qualified in the specific NDT application 3.9 NDT procedure written de

28、scription of all essential parameters and precautions to be applied when non-destructively testing products in accordance with standard(s), code(s) or specification(s) 3.10 performance-based qualification programme methodology for establishing the ability of a specific qualification system (for equi

29、pment, procedures, and personnel) to achieve a required level of performance 3.11 qualification body independent entity that administers qualification of NDT personnel, NDT equipment and NDT procedures 3.12 qualification certificate document issued under the rules of a qualification system indicatin

30、g that adequate confidence is provided that NDT procedures, equipment and personnel or any combination of these are capable, for a specific non- destructive test, of achieving the stated objectives 3.13 qualification procedure orderly sequence of rules describing how a specific non-destructive test

31、on a specific component is qualified 3.14 qualification specimen example or a simulation of the component for which the non-destructive test is qualified which, as appropriate, replicates size, geometry, material properties and containing discontinuities to be encountered on site ISO/TS 11774:2011(E

32、) ISO 2011 All rights reserved 34 Responsibilities 4.1 Qualification body A qualification body shall develop and administer the qualification process, in accordance with the qualification procedure, and issue certificates of qualification upon compliance with this Technical Specification and ISC spe

33、cific requirements. 4.2 Employer An employer is responsible for authorizing employees to perform NDT for which they are qualified in compliance with this Technical Specification and ISC specific requirements. 4.3 Industry sector committee An ISC establishes qualification requirements for specific in

34、dustry applications, and advises the qualification body on all technical and procedural matters concerning the qualification. 5 Qualification of the NDT procedure To ensure effective and consistent evaluation of personnel, the NDT procedure shall first be qualified in accordance with Annex A. The qu

35、alified procedure is valid only when the essential parameters are applied and controlled as defined within the procedure. The procedure qualification shall demonstrate the capability to resolve mandatory detectable discontinuities under representative conditions. 6 Prerequisites for performance-base

36、d qualification examinations 6.1 To be permitted to continue with the performance-based qualification examination, the candidate shall fulfil either 6.1.1 or 6.1.2. 6.1.1 The candidate shall provide evidence of current level 2 or 3 certification in the method(s) for which he is to be qualified under

37、 this Technical Specification. For NDT level 2 personnel, the certification may be from a nationally recognized employer-based programme or a certification body accepted by the ICS. For NDT level 3 personnel, the certification shall be from a certification body. 6.1.2 The candidate shall satisfy the

38、 training and experience established by the ISC in 6.2 and successfully complete written examinations administered by a certification body approved by the ISC. The certification body accepted by the ISC shall confirm conformance with the foregoing. 6.2. Candidates for qualification shall have suffic

39、ient training and specific practical experience to ensure they are capable of performing non-destructive tests using the qualified NDT procedure. The experience may be obtained with the use of virtual training systems, or by examining representative specimens, that may be located in a laboratory, wi

40、th relevant and non-relevant discontinuities that may be located in a laboratory, or analysing recorded data from automatic, digital or analogue systems. 7 Performance-based qualification examination 7.1 Qualification specimens The ISC shall: specify the mandatory detectable discontinuities size and

41、 type, in consultation with the regulator, original equipment manufacturer or design authority where appropriate, using applicable codes, standards and engineering principles; and confirm that qualification specimens are consistent with the specification. ISO/TS 11774:2011(E) 4 ISO 2011 All rights r

42、eserved7.2 Assembly of the specimens 7.2.1 The discontinuities in the specimens that the candidates shall report may be actual or simulated and shall range in size from the minimum detectable using a qualified procedure to not more than the maximum size specified by the ISC in 7.1. The tolerance for

43、 reporting discontinuity dimensions by candidates shall be determined by the ISC. 7.2.2 As a minimum, a set of specimens or grading units containing at least 10 discontinuities is required. 7.2.3 The specimen or grading unit sets containing discontinuities for each practical examination shall be ass

44、embled from the specimen bank using a random process, while taking reasonable steps to achieve a consistent level of difficulty. Blank (containing no discontinuities) qualification specimens or grading units shall be included in the specimen set so that no more than one-third of the specimens or gra

45、ding units in the set contain discontinuities required to be detected. Examples are provided in Table 1. Table 1 Numbers of grading units with and without discontinuities Grading units containing discontinuities Minimum grading units containing no discontinuities Minimum total grading units 10 (mini

46、mum a ) 20 30 11 22 33 12 24 36 13 26 39 14 28 42 15 30 45 aThe above grading units may be increased provided the ratio of grading units containing discontinuities to grading units without discontinuities is maintained at 1:2 or less. 7.2.4 The unique identification of specimens or grading units wit

47、h or without discontinuities shall be masked such that neither can be identified. 7.3 Administration and grading of examinations 7.3.1 The minimum detection and false call rate shall be determined by the ISC. 7.3.2 The qualification body shall be responsible for the administration and grading of exa

48、minations and shall appoint the NDT qualification examiner. Provisions to ensure the confidentiality of qualification materials (e.g. qualification specimens and answer sheets) shall be included in the procedures of the qualification body. Access to such qualification materials shall be limited, and

49、 the qualification examinations shall be maintained in secure files. 7.3.3 Candidates failing initially are allowed to be re-examined. Candidates failing re-examination shall receive additional documented training and experience as determined by the ISC before further re-examination. For all re-examinations, the candidate shall be presented with at least 50 % new discontinuities. ISO/TS 11774:2011(E) ISO 2011 All rights reserved 58 Post-qualification requirements 8.1 Continuing practice Once qualified, NDT personnel shall practi