Founding — Ultrasonic examination

1 BRITISH STANDARDBS EN 12680-1:2003 Founding Ultrasonic examination Part 1: Steel castings for general purposesThe European Standard EN 12680-1:2003 has the status of a British StandardICS Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Alstom Industrial GAs Turbines/5941029100 Not for Resale, 11/24/2006 03:27:53 MSTNo reproduction or networking permitted without license from IHS--`,,,,`,,````,,,`,,,`,`,,,``,`-`-`,, `,,`,`,,`---BS EN 12680-1:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 5 February 2003 BSI 5 February 2003 ISBN 0 580 41198 2 National forewordThis British Standard is the official English language version of EN 12680-1:2003. It supersedes BS 6208:1990 which is UK participation in its preparation was entrusted to Technical Committee ISE/NFE/9, Foundry technology, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its British Standards which implement international or European publications referred to in this 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 publication does not purport to include all the necessary provisions of a contract.

2 Users are responsible for its correct with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 33 and a back BSI copyright date displayed in this document indicates when the document was last issued since publicationAmd. No. DateCommentsCopyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Alstom Industrial GAs Turbines/5941029100 Not for Resale, 11/24/2006 03:27:53 MSTNo reproduction or networking permitted without license from IHS--`,,,,`,,````,,,`,,,`,`,,,``,`-`-`,, `,,`,`,,`---EUROPEAN STANDARDNORME EUROP ENNEEUROP ISCHE NORMEN 12680-1 January 2003 ICS versionFounding - Ultrasonic examination - Part 1: Steel castings forgeneral purposesFonderie - Contr le par ultrasons - Partie 1: Pi cesmoul es en acier pour usages g n rauxGie ereiwesen - Ultraschallpr fung - Teil 1:Stahlgussst cke f r allgemeine VerwendungThis European Standard was approved by CEN on 21 November members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration.

3 Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and COMMITTEE FOR STANDARDIZATIONCOMIT EUROP EN DE NORMALISATIONEUROP ISCHES KOMITEE F R NORMUNGM anagement Centre: rue de Stassart, 36 B-1050 Brussels 2003 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national No. EN 12680-1:2003 ECopyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Alstom Industrial GAs Turbines/5941029100 Not for Resale, 11/24/2006 03:27:53 MSTNo reproduction or networking permitted without license from IHS--`,,,,`,,````,,,`,,,`,`,,,``,`-`-`,, `,,`,`,,`---EN 12680-1:2003 (E).

4 42 Normative references ..43 Terms and .. information .. of permissible size of qualification .. section zones .. levels .. and coupling medium .. of casting surfaces for examination .. procedure .. report ..11 Annex A (informative) Sound-beam diameters ..19 Annex B (informative) Types of indications ..21 Bibliography ..33 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Alstom Industrial GAs Turbines/5941029100 Not for Resale, 11/24/2006 03:27:53 MSTNo reproduction or networking permitted without license from IHS--`,,,,`,,````,,,`,,,`,`,,,``,`-`-`,, `,,`,`,,`---EN 12680-1:2003 (E)3 ForewordThis document (EN 12680-1:2003) has been prepared by Technical Committee CEN/TC 190 "Foundry Technol-ogy", the secretariat of which is held by European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by July 2003, and conflicting national standards shall be withdrawn at the latest byJuly its programme of work, Technical Committee CEN/TC 190 requested CEN/TC 190/WG "Inner defects"to prepare the following standard:EN 12680-1, Founding Ultrasonic examination Part 1.

5 Steel castings for general is one of three European Standards for Ultrasonic examination . The other standards are:EN 12680-2, Founding Ultrasonic examination Part 2: Steel castings for highly stressed 12680-3, Founding Ultrasonic examination Part 3: Spheroidal graphite cast iron A and B are to the CEN/CENELEC Internal Regulations, the national standards organizations of the following coun-tries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Swe-den, Switzerland and the United British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Alstom Industrial GAs Turbines/5941029100 Not for Resale, 11/24/2006 03:27:53 MSTNo reproduction or networking permitted without license from IHS--`,,,,`,,````,,,`,,,`,`,,,``,`-`-`,, `,,`,`,,`---EN 12680-1:2003 (E)41 ScopeThis European Standard specifies the requirements for the Ultrasonic examination of steel castings (with ferriticstructure) for general purposes and the methods for determining internal discontinuities by the pulse-echo European Standard applies to the Ultrasonic examination of steel castings which have usually received a grainrefining heat treatment and which have wall thicknesses up to and including 600 greater wall thicknesses, special agreements apply with respect to test procedure and recording European Standard does not apply to austenitic steels and joint Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications.

6 Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 583-1, Non-destructive testing Ultrasonic examination Part 1: General 583-2, Non-destructive testing Ultrasonic examination Part 2: Sensitivity and range 583-5, Non-destructive testing Ultrasonic examination Part 5: Characterization and sizing of 12223, Non-destructive testing Ultrasonic examination Specification for calibration block No. 12668-1, Non-destructive testing Characterization and verification of Ultrasonic examination equipment Part 1: 12668-2, Non-destructive testing Characterization and verification of Ultrasonic examination equipment Part 2: 12668-3, Non-destructive testing Characterization and verification of Ultrasonic examination equipment Part 3: Combined 27963, Welds in steel Calibration block No.

7 2 for Ultrasonic examination of welds (ISO 7963:1985).3 Terms and definitionsFor the purposes of this European Standard, the following terms and definitions terms and definitions used in this European Standard are given in EN 583-1, EN 583-2, EN 583-5 andEN discontinuity echo sizesmallest indication to be recorded during the assessment phase of an Ultrasonic examination , usually expressed asan equivalent flat-bottomed hole diameterCopyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Alstom Industrial GAs Turbines/5941029100 Not for Resale, 11/24/2006 03:27:53 MSTNo reproduction or networking permitted without license from IHS--`,,,,`,,````,,,`,,,`,`,,,``,`-`-`,, `,,`,`,,`---EN 12680-1:2003 (E) discontinuitydiscontinuity, the dimensions of which are smaller than or equal to the sound-beam widthNOTED imensions in this standard relate to length, width and/or dimension in through-wall discontinuitydiscontinuity, the dimensions of which are larger than the sound-beam widthNOTED imensions in this standard relate to length, width and/or dimension in through-wall discontinuitydiscontinuity having two measurable discontinuitydiscontinuity having three measurable rim zoneouter rim zone part with special requirements (for machined surfaces, higher stresses, sealing surfaces)

8 Weldingany welding carried out during manufacturing before final delivery to the weldingproduction welding used to assemble components together to obtain an integral weldingproduction welding carried out in order to ensure the agreed quality of the casting4 Order informationThe following information shall be available at the time of enquiry and order (see also EN 583-1): the areas of the casting and the number or percentage of castings to which the Ultrasonic examination require-ments apply ( examination volume, extent of examination ); the severity level to be applied to the various zones or areas of the casting (acceptance criteria); requirements for a written examination procedure; whether there are any additional requirements for the examination procedure, see also British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Alstom Industrial GAs Turbines/5941029100 Not for Resale, 11/24/2006 03:27:53 MSTNo reproduction or networking permitted without license from IHS--`,,,,`,,````,,,`,,,`,`,,,``,`-`-`,, `,,`,`,,`---EN 12680-1.

9 2003 (E) Extent of examinationThe casting shall be examined so that the agreed areas are totally covered (insofar as this is possible from theshape of the casting) by the use of the best applicable examination wall thicknesses greater than 600 mm, agreement shall be made between the parties concerned on the exami-nation procedure and also on the recording and acceptance Maximum permissible size of Limits of acceptance for planar discontinuities mainly orientated perpendicular to the surfaceThe limits of acceptance for planar discontinuities are given in Figure with measurable dimensions are not permissible as severity level largest dimension in through-wall direction shall not exceed 10 % of wall thickness, except indications with ameasurable length 10 mm. Such indications shall not exceed a dimension in through-wall direction of 25 % of wallthickness or 20 greatest distance between indications as criterion for evaluation as single indication or indication area perpen-dicular or lateral to the surface shall be 10 an area with measurable length and non-measurable dimension in through-wall direction, this non-measurabledimension shall be taken as 3 mm and the area be calculated:A = 3 L(1)where A is the area of indication expressed in square millimetres; 3 is the taken width in millimetres; L is the measurable length expressed in Limits of acceptance for volumetric discontinuitiesThe limits of acceptance for volumetric discontinuities are given in Table 1.

10 Any discontinuity exceeding one of thecriteria shall be considered as Maximum permissible discontinuities in the case of radiographic examination of the casting carriedout as a supplement to Ultrasonic examinationUnless otherwise agreed by the time of enquiry and order, when, after conducting the radiographic and the ultra-sonic examination in combination, it has been demonstrated that a discontinuity is situated in the core zone, thisadditional information makes the discontinuity acceptable at one level less severe, severity level 3 instead of 2for radiographic examination , see EN Personnel qualificationIt is assumed that Ultrasonic examination is performed by qualified and capable personnel. In order to prove thisqualification, it is recommended to certify personnel in accordance with EN British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Alstom Industrial GAs Turbines/5941029100 Not for Resale, 11/24/2006 03:27:53 MSTNo reproduction or networking permitted without license from IHS--`,,,,`,,````,,,`,,,`,`,,,``,`-`-`,, `,,`,`,,`---EN 12680-1:2003 (E) Wall section zonesThe wall section shall be divided into zones as shown in Figure 2.