《NF-EN-12680-1-2003-ENG.pdf》由会员分享，可在线阅读，更多相关《NF-EN-12680-1-2003-ENG.pdf（36页珍藏版）》请在三一文库上搜索。
1、NF EN 12680-1 mai 2003 Ce document est usage exclusif et non collectif des clients Saga Web. Toute mise en rseau, reproduction et rediffusion, sous quelque forme que ce soit, mme partielle, sont strictement interdites. This document is intended for the exclusive and non collective use of Saga Web cu
2、stomers. All network exploitation, reproduction and re-dissemination,even partial, whatever the form (hardcopy or other media), is strictly prohibited. Saga Web Pour THALES CORPORATE SERVICES SAS - EPM Client 04988312 le 16/7/2009 10:31 Published and distributed by Association Franaise de Normalisat
3、ion (AFNOR French standard institute) 11, avenue Francis de Pressens 93571 Saint-Denis La Plaine Cedex Tel.: + 33 (0)1 41 62 80 00 Fax: + 33 (0)1 49 17 90 00 www.afnor.fr Distributed by Bureau de Normalisation des Industries de la Fonderie (BNIF), 44, av de la Division Leclerc, 92318 Svres Cedex Tel
4、.: + 33 (0)1 41 14 63 00 AFNOR 2003 All rights reserved FE045258ISSN 0335-3931 NF EN 12680-1 May 2003 Classification index: A 04-162-1 European standard French standard AFNOR 2003AFNOR 20031st issue 2003-05-P ICS: 77.040.20 Founding Ultrasonic examination Part 1: Steel castings for general purposes
5、F : Fonderie Contrle par ultrasons Partie 1 : Pices moules en acier pour usages gnraux D : Gieereiwesen Ultraschallprfung Teil 1: Stahlgussstcke fr allgemeine Verwendung French standard approved by decision of the Director General of AFNOR on April 20, 2003 taking effect on May 20, 2003. With standa
6、rd NF EN 12680-2, dated May 2003, this standard replaces approved standard NF A 04-162, dated October 1991. CorrespondenceThe European standard EN 12680-1:2003 has the status of French standard. AnalysisThis document is part of a series of European standards on founding products. It applies to the u
7、ltrasonic examination of general purpose steel castings (excluding austenitic steel) to detect internal discontinuities using the reflection method. DescriptorsTechnical International Thesaurus: foundry engineering, cast steels, low alloy steels, nondestructive tests, surface condition, defects, acc
8、eptability, procedure. ModificationsAdoption of the European standard with respect to the document replaced. Corrections NF EN 12680-1:2003 2 National foreword References to French standards The correspondence between the standards figuring in the clause “Normative references“ and the identical Fren
9、ch standards is as follows: EN 583-1: NF EN 583-1 (classification index: A 09-340-1) EN 583-2: NF EN 583-2 (classification index: A 09-340-2) EN 583-5: NF EN 583-5 (classification index: A 09-340-5) EN 12223: NF EN 12223 (classification index: A 09-311) EN 12668-1: NF EN 12668-1 (classification inde
10、x: A 09-320-1) EN 12668-2: NF EN 12668-2 (classification index: A 09-320-2) EN 12668-3: NF EN 12668-3 (classification index: A 09-320-3) EN 27963: NF EN 27963 (classification index: A 89-611) EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12680-1 January 2003 ICS 77.040.20 English version Foun
11、ding - Ultrasonic examination - Part 1: Steel castings for general purposes Fonderie - Contrle par ultrasons - Partie 1: Pices moules en acier pour usages gnraux Gieereiwesen - Ultraschallprfung - Teil 1: Stahlgussstcke fr allgemeine Verwendung This European Standard was approved by CEN on 21 Novemb
12、er 2002. 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 such national standards may be obta
13、ined on application to the 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 Management Cen
14、tre has the same status as the official versions. CEN 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
15、 United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2003 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12680-
16、1:2003 E EN 12680-1:2003 (E) 2 Contents page Foreword3 1Scope 4 2Normative references 4 3Terms and definitions4 4Requirements.5 4.1Order information 5 4.2Extent of examination6 4.3Maximum permissible size of discontinuities.6 4.4Personnel qualification .6 4.5Wall section zones.7 4.6Severity levels7
17、5Examination7 5.1Principles7 5.2Material7 5.3Equipment and coupling medium8 5.4Preparation of casting surfaces for examination.8 5.5Examination procedure.9 5.6Examination report 11 Annex A (informative) Sound-beam diameters .19 Annex B (informative) Types of indications 21 Bibliography33 EN 12680-1:
18、2003 (E) 3 Foreword This document (EN 12680-1:2003) has been prepared by Technical Committee CEN/TC 190 “Foundry Technol- ogy“, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorseme
19、nt, at the latest by July 2003, and conflicting national standards shall be withdrawn at the latest by July 2003. Within its programme of work, Technical Committee CEN/TC 190 requested CEN/TC 190/WG 4.10 “Inner defects“ to prepare the following standard: EN 12680-1, Founding Ultrasonic examination P
20、art 1: Steel castings for general purposes. This 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 components. EN 12680-3, Founding Ultrasonic examination Part 3: Spheroidal g
21、raphite cast iron castings. Annexes A and B are informative. According 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
22、, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Swe- den, Switzerland and the United Kingdom. EN 12680-1:2003 (E) 4 1 Scope This European Standard specifies the requirements for the ultrasonic examination of steel castings (with ferritic structure) for general pur
23、poses and the methods for determining internal discontinuities by the pulse-echo tech- nique. This European Standard applies to the ultrasonic examination of steel castings which have usually received a grain refining heat treatment and which have wall thicknesses up to and including 600 mm. For gre
24、ater wall thicknesses, special agreements apply with respect to test procedure and recording levels. This European Standard does not apply to austenitic steels and joint welds. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publication
25、s. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. Fo
26、r undated references the latest edition of the publication referred to applies (including amendments). EN 583-1, Non-destructive testing Ultrasonic examination Part 1: General principles. EN 583-2, Non-destructive testing Ultrasonic examination Part 2: Sensitivity and range setting. EN 583-5, Non-de
27、structive testing Ultrasonic examination Part 5: Characterization and sizing of discon- tinuities. EN 12223, Non-destructive testing Ultrasonic examination Specification for calibration block No. 1. EN 12668-1, Non-destructive testing Characterization and verification of ultrasonic examination equip
28、ment Part 1: Instruments. EN 12668-2, Non-destructive testing Characterization and verification of ultrasonic examination equipment Part 2: Probes. EN 12668-3, Non-destructive testing Characterization and verification of ultrasonic examination equipment Part 3: Combined equipment. EN 27963, Welds in
29、 steel Calibration block No. 2 for ultrasonic examination of welds (ISO 7963:1985). 3 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply. NOTEOther terms and definitions used in this European Standard are given in EN 583-1, EN 583-2, EN 583-5
30、and EN 1330-4. 3.1 reference discontinuity echo size smallest indication to be recorded during the assessment phase of an ultrasonic examination, usually expressed as an equivalent flat-bottomed hole diameter EN 12680-1:2003 (E) 5 3.2 point discontinuity discontinuity, the dimensions of which are sm
31、aller than or equal to the sound-beam width NOTEDimensions in this standard relate to length, width and/or dimension in through-wall direction. 3.3 complex discontinuity discontinuity, the dimensions of which are larger than the sound-beam width NOTEDimensions in this standard relate to length, widt
32、h and/or dimension in through-wall direction. 3.4 planar discontinuity discontinuity having two measurable dimensions 3.5 volumetric discontinuity discontinuity having three measurable dimensions 3.6 special rim zone outer rim zone part with special requirements (for e.g. machined surfaces, higher s
33、tresses, sealing surfaces) 3.7 production welding any welding carried out during manufacturing before final delivery to the purchaser 3.7.1 joint welding production welding used to assemble components together to obtain an integral unit 3.7.2 finishing welding production welding carried out in order
34、 to ensure the agreed quality of the casting 4 Requirements 4.1 Order information The 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 ap
35、ply (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 5.5.1. EN 1268
36、0-1:2003 (E) 6 4.2 Extent of examination The casting shall be examined so that the agreed areas are totally covered (insofar as this is possible from the shape of the casting) by the use of the best applicable examination technique. For wall thicknesses greater than 600 mm, agreement shall be made b
37、etween the parties concerned on the exami- nation procedure and also on the recording and acceptance levels. 4.3 Maximum permissible size of discontinuities 4.3.1 Limits of acceptance for planar discontinuities mainly orientated perpendicular to the surface The limits of acceptance for planar discon
38、tinuities are given in Figure 1. Indications with measurable dimensions are not permissible as severity level 1. The largest dimension in through-wall direction shall not exceed 10 % of wall thickness, except indications with a measurable length 10 mm. Such indications shall not exceed a dimension i
39、n through-wall direction of 25 % of wall thickness or 20 mm. The greatest distance between indications as criterion for evaluation as single indication or indication area perpen- dicular or lateral to the surface shall be 10 mm. For an area with measurable length and non-measurable dimension in thro
40、ugh-wall direction, this non-measurable dimension 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 millimetres. 4.3.2 Limits of acceptance for
41、volumetric discontinuities The limits of acceptance for volumetric discontinuities are given in Table 1. Any discontinuity exceeding one of the criteria shall be considered as unacceptable. 4.3.3 Maximum permissible discontinuities in the case of radiographic examination of the casting carried out a
42、s a supplement to ultrasonic examination Unless 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, this additional information makes th
43、e discontinuity acceptable at one level less severe, e.g. severity level 3 instead of 2 for radiographic examination, see EN 1559-2. 4.4 Personnel qualification It is assumed that ultrasonic examination is performed by qualified and capable personnel. In order to prove this qualification, it is reco
44、mmended to certify personnel in accordance with EN 473. EN 12680-1:2003 (E) 7 4.5 Wall section zones The wall section shall be divided into zones as shown in Figure 2. These sections relate to the dimensions of the casting ready for assembly (finish machined). 4.6 Severity levels If the purchaser sp
45、ecifies different severity levels in different areas of the same casting, all of these areas shall be clearly identified on the purchasers drawing and shall include: all necessary dimensions for accurate location of zones; the full extent of all weld preparations and the thickness of any special rim
46、 zone. Severity level 1 is only applied to weld preparations and special rim zones. Unless other requirements have been agreed by the time of acceptance of the order, for finishing welds, the re- quirements for the parent metal shall apply. 5 Examination 5.1 Principles The principles of ultrasonic e
47、xamination given in EN 583-1, EN 583-2 and EN 583-5 shall apply. 5.2 Material The suitability of material for ultrasonic examination is assessed by comparison with the echo height of a reference reflector (usually the first backwall echo) and the noise signal. This assessment shall be carried out on
48、 selected casting areas which are representative of the surface finish and of the total thickness range. The assessment areas shall have parallel surfaces. The reference echo height according to Table 2 shall be at least 6 dB above the noise signal. If the echo height of this smallest detectable fla
49、t-bottomed or equivalent side-drilled hole diameter at the end of the test range to be assessed is less than 6 dB above the grass level, then the ultrasonic testability is reduced. In this case, the flat-bottomed or side-drilled hole diameter which can be detected with a signal-noise ratio of at least 6 dB shall be noted in the test report and the additional procedure shall be agreed between the manufacturer and the purchaser. NOTEFor the definition of an adequate