BS DD CEN TS 15053-2005 Non-destructive testing - Recommendations for discontinuities-types in test specimens for examination《无损检验 检查用间断式试样的建议》.pdf

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1、DRAFT FOR DEVELOPMENT DD CEN/TS 15053:2005 Non-destructive testing Recommendations for discontinuities-types in test specimens for examination ICS 19.100 DD CEN/TS 15053:2005 This Draft for Development was published under the authority of the Standards Policy and Strategy Committee on 13 December 20

2、05 BSI 13 December 2005 ISBN 0 580 47080 6 National foreword This Draft for Development is the official English language version of CEN/TS 15053:2005. This publication is not to be regarded as a British Standard. It is being issued in the Draft for Development series of publications and is of a prov

3、isional nature because details for these types of test specimens have not previously been covered by formal standardization. It should be applied on this provisional basis, so that information and experience of its practical application may be obtained. Comments arising from the use of this Draft fo

4、r Development are requested so that UK experience can be reported to the European organization responsible for its conversion to a European standard. A review of this publication will be initiated 2 years after its publication by the European organization so that a decision can be taken on its statu

5、s at the end of its 3-year life. Notification of the start of the review period will be made in an announcement in the appropriate issue of Update Standards. According to the replies received by the end of the review period, the responsible BSI Committee will decide whether to support the conversion

6、 into a European Standard, to extend the life of the Technical Specification or to withdraw it. Comments should be sent in writing to the Secretary of BSI Technical Committee WEE/46, Non-destructive testing, at British Standards House, 389 Chiswick High Road, London W4 4AL, giving the document refer

7、ence and clause number and proposing, where possible, an appropriate revision of the text. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in t

8、his document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a c

9、ontract. Users are responsible for its correct application. Summary of pages This document comprises a front cover, an inside front cover, the CEN/TS title page, pages 2 to 15 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendment

10、s issued since publication Amd. No. Date CommentsTECHNICALSPECIFICATION SPCIFICATIONTECHNIQUE TECHNISCHESPEZIFIKATION CEN/TS15053 August2005 ICS19.100 EnglishVersion NondestructivetestingRecommendationsfordiscontinuities typesintestspecimensforexamination EssaisnondestructifsRecommandationsrelatives

11、aux typesdediscontinuitsprsentesdansleschantillons dessaiutilisspourlesexamens ZerstrungsfreiePrfungEmpfehlungenfrArtenvon InhomogenitteninPrfungsstckenfrPrfungen ThisTechnicalSpecification(CEN/TS)wasapprovedbyCENon7May2005forprovisionalapplication. TheperiodofvalidityofthisCEN/TSislimitedinitiallyt

12、othreeyears.AftertwoyearsthemembersofCENwillberequested tosubmittheir comments,particularlyonthequestionwhethertheCEN/TScanbeconvertedintoaEuropeanStandard. CENmembersarerequiredtoannouncetheexistenceofthisCEN/TSinthesamewayasforanENandtomaketheCEN/TSavailable promptlyatnationallevelinanappropriatef

13、orm.Itispermissibletokeepconflictingnationalstandardsinforce(inparall eltotheCEN/TS) untilthefinaldecisionaboutthepossibleconversionoftheCEN/TSintoanENisreached. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Icela

14、nd,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2005CEN Allri

15、ghtsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.CEN/TS15053:2005:ECEN/TS 15053:2005 2 Contents Page Foreword 3 1 Scope .4 2 Normative references .4 3 Terms and definitions.4 4 Product sectors.4 5 Minimum size of discontinuity .6 6 Surface conditions8 7 Number

16、of discontinuities in each sample8 8 Radiographic interpretation test (radiographs) 8 9 Master report .9 Annex A (informative) Discontinuities in castings.10 Annex B (informative) Discontinuities in welds .11 Annex C (informative) Discontinuities in wrought products .12 Annex D (informative) Discont

17、inuities in forgings.13 Annex E (informative) Discontinuities in tubes and pipes 14 Annex F (informative) Discontinuities in in-service inspection 15 CEN/TS 15053:2005 3 Foreword This Technical Specification (CEN/TS 15053:2005) has been prepared by Technical Committee CEN/TC 138 “Non-destructive tes

18、ting”, the secretariat of which is held by AFNOR. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to announce this Technical Specification: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, German

19、y, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. 4 1 Scope This Technical Specification is established to consider and define discontinuities-types to be exhibi

20、ted in test specimens for use in practical Non Destructive Testing examinations. According to EN 473:2000, Clause 7.1.3.3, the discontinuities contains in the test specimens may be natural, artificial or implanted. Acoustic Emission Testing, Infrared Thermography Testing and Leak Testing need not de

21、fine discontinuity- type, due to their specific approach (e.g. replaced in AT by artificial sources). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the la

22、test edition of the referenced document (including any amendments) applies. EN 473:2000, Non-destructive testing Qualification and certification of NDT personnel - General principles. EN ISO 4063, Welding and allied processes - Nomenclature of processes and reference numbers (ISO 4063:1998). EN ISO

23、6520-1, Welding and allied processes - Classification of geometric imperfections in metallic materials. Part 1: Fusion welding (ISO 6520-1:1998) 3 Terms and definitions For the purposes of this Technical Specification, the terms and definitions given in EN 473:2000 and the following apply. 3.1 Test

24、area area of a test specimen, either the whole or just a part, which is to be tested by a candidate during the practical examination. A single test specimen can contain a number of test areas with no overlap 3.2 Minimum number of test pieces maximum number of candidates allowed to perform simultaneo

25、usly a practical examination, in an examination centre approved by a certifying body, shall be a figure less than the total number of test specimens that the examination centre has to hold at ones disposal, for this examination 4 Product sectors 4.1 Castings (c) 4.1.1 Configuration The range of test

26、 specimens held by the examination centre may include the following characteristics: Cylindrical section (large and small diameters); Flanges; Changes of sections; CEN/TS 15053:20055 Nozzles or junctions (T, L, Y and X). The use of castings which contain both weld repairs and natural volumetric flaw

27、s are permitted. 4.1.2 Discontinuities-types The discontinuities-types are defined in the matrix in Annex A. 4.2 Welded test specimens (w) 4.2.1 Configuration The range of test specimens held by the examination centre may include the following characteristics: Plate butt welds; Pipes and tubes; Join

28、ts; Nozzle welds; Weld build-ups. 4.2.2 Discontinuities-types The discontinuities-types are defined in the matrix in Annex B. 4.3 Wrought test specimen (wp) 4.3.1 Configuration The range of test specimens held by the examination centre may include the following characteristics: Plates and strips; Tu

29、bes and pipes; Long products (bars, etc). 4.3.2 Discontinuities-types The discontinuities-types are defined in the matrix in Annex C. 4.4 Forgings (f) 4.4.1 Configuration The range of test specimens held by the examination centre may include the following characteristics: Cylindrical section (large

30、and small diameters); Flanges; Open die/hand forgings with simple geometry; CEN/TS 15053:20056 Die/drop forgings with simple and complex geometry 4.4.2 Discontinuities-types The discontinuities-types are defined in the matrix in Annex D. 4.5 Tubes and pipes (t) 4.5.1 Configuration The range of test

31、specimens (seamless and welded) held by the examination centre may include the following characteristics: hollow sections (large and small diameters); nozzles or junctions (T, L, Y and X); elbows; reductions; flanges. 4.5.2 Discontinuities-types The discontinuities-types are defined in the matrix in

32、 Annex E. 4.6 In Service Inspection 4.6.1 Configuration The minimum number of test specimens shall include the product sectors according to Table B.1 of EN 473:2000. 4.6.2 Discontinuities-types The discontinuities-types are defined in the matrix in Annex F. 5 Minimum size of discontinuity 5.1 Genera

33、l NOTE Samples may contain smaller discontinuities as those indicated below, but they are not to be taken into consideration for examinations. If available, threshold values are given in NDT product standard. In case there are no available standard or no value given, the following values shall be us

34、ed. CEN/TS 15053:20057 5.2 Radiographic testing (RT) 5.2.1 For specimen examination The test specimen need not contain any discontinuity. 5.2.2 For interpretation of radiographs indication size in the radiograph Planar indication: Minimum length: 5 mm. Volumetric indication: Pores: 2 mm; Cluster: 5

35、mm; Inclusion: 3 mm. 5.3 Ultrasonic testing (UT) Planar discontinuity: Minimum length: 5 mm; Through wall extend: 2 mm. Volumetric discontinuity: Minimum size: side drill hole of 2 mm. 5.4 Magnetic particle and penetrant testing (MT-PT) Linear indication: Minimum length: 3 mm. Rounded indication: Is

36、olated: 5 mm; Cluster: 5 mm. 5.5 Eddy current testing (ET) Linear discontinuity: Minimum length: 5 mm. Where no product standard defines the minimum size of indication, any configuration of discontinuity for which the local signal-to-noise ratio for at least one signal component between two to three

37、, is recommended. 5.6 Visual testing (VT) Direct aided VT: CEN/TS 15053:20058 Minimum length of surface discontinuity: 1 mm. Remote VT: Depends on the goal of the test. 6 Surface conditions The specimen shall have a surface finished free from loose products of corrosion and/or protective finishes in

38、 such a way that it shall provide sufficient access for NDT methods to be used. 7 Number of discontinuities in each sample Specimen shall contain, as a minimum, one planar and/or volumetric discontinuity having location and dimensions suitable for the applicable NDT method. 8 Radiographic interpreta

39、tion test (radiographs) 8.1 Definition Radiographic interpretation test is constituted by radiographs (original or copy), exhibiting a sufficient range of artefacts material/structural anomalies and densities, to provide a realistic and unambiguous test of the ability of a radiographic interpreter t

40、o read, interpret and accurately report the results of radiographs. 8.2 Conditions Radiographs shall be in good condition for viewing (verified and attested before the beginning of each exam session, by one jury Level 3 RT who belongs to the board of examiners), and shall contain, as a minimum, one

41、indication and should contain not more than five different types of indications. The use of radiograph copies or digitally reproduced is not precluded if the quality of the copy is achieved in respect of density, contrast, definition and sensitivity. They have to meet the minimum requirements of the

42、 specification applied for the original radiographs. Radiographs may be of any size providing a suitable film viewer. Examination centres shall hold representative radiographs of the product sectors they are approved for. For In Service Inspection industrial sector, the range of radiographs shall in

43、clude those relevant of the two following product sectors: weldings (w) and castings (c). 8.3 Quality Radiographs shall be produced in accordance with the appropriate standard and also with respect to exposure parameters, resulting optical density and processing. Image Quality Indicators of an inter

44、nationally recognized type, shall be visible on each test specimen radiograph. To unambiguously determine indication location by a candidate, radiographs shall contain a sufficient number of marker points, at least not less than two. CEN/TS 15053:20059 9 Master report All the discontinuities in the

45、test specimens, which could be relevant for the evaluation, shall be reported on a master report, which shall contain as a minimum the following: a) name and logo of certification body; b) test specimen identification number; c) product; d) material; e) NDT method; f) reference standard used; g) acc

46、eptable/ unacceptable criteria level to be used, if applicable; h) equipment and means; i) setting up used to perform the test and tolerance, if applicable; j) indication: type; position in relation to a given reference point and tolerance, if applicable; dimensions; orientation. k) final acceptable

47、 / unacceptable evaluation of indication 1) ; l) report of salient features relevant to marking scheme; m) any other relevant features. Note The use of sketches to enhance information is not precluded. Sketches may be scaled. 1) Depending on the acceptance level of indication and candidates qualific

48、ation CEN/TS 15053:2005Annex A (informative) Discontinuities in castings Table A.1 Discontinuities in castings Product form Planar discontinuities Volumetric discontinuities Castings (c) Manufacturingpro cess Methods Surface Methods Sub-surface Methods Surface Methods Sub-surface Ferrous materials Sand casting Investment castings MT, PT, ET, VT, UT, RT Cracks, Hot tears, Inserts, Cold Shuts Shrinkage UT, RT Cracks, Inserts, Cold Shuts, Shrin