1、June 2015Translation by DIN-Sprachendienst.English price group 7No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 25.
2、160.40!%C;p“2322477www.din.deDDIN EN ISO 23278Non-destructive testing of welds Magnetic particle testing Acceptance levels (ISO 23278:2015);English version EN ISO 23278:2015,English translation of DIN EN ISO 23278:2015-06Zerstrungsfreie Prfung von Schweiverbindungen Magnetpulverprfung von Schweiverb
3、indungen Zulssigkeitsgrenzen (ISO 23278:2015);Englische Fassung EN ISO 23278:2015,Englische bersetzung von DIN EN ISO 23278:2015-06Contrle non destructif des assemblages souds Contrle par magntoscopie Niveaux dacceptation (ISO 23278:2015);Version anglaise EN ISO 23278:2015,Traduction anglaise de DIN
4、 EN ISO 23278:2015-06SupersedesDIN EN ISO 23278:2010-03www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 9 pages05.15 DIN EN ISO 23278:2015-06 2 A comma is used as the decimal marker. National foreword This document (EN ISO 23278:2015) ha
5、s been prepared by Technical Committee ISO/TC 44 “Welding and allied processes” in collaboration with Technical Committee CEN/TC 121 “Welding and allied processes” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the DIN-Normenausschuss Materialprfung (DIN Sta
6、ndards Committee Materials Testing), Working Committee NA 062-08-24 AA Elektrische und magnetische Prfverfahren. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 5817 DIN EN ISO 5817 ISO 17635 DIN EN ISO 17635 ISO 17638 DIN EN ISO 17638
7、Amendments This standard differs from DIN EN ISO 23278:2010-03 as follows: a) the document has been editorially revised; b) normative references have been updated; c) the subclause dealing with grouped indications has been deleted. Previous editions DIN EN 1291: 1998-03, 2002-09 DIN EN ISO 23278: 20
8、10-03 National Annex NA (informative) Bibliography DIN EN ISO 5817, Welding Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded) Quality levels for imperfections DIN EN ISO 17635, Non-destructive testing of welds General rules for metallic materials DIN EN ISO 176
9、38, Non-destructive testing of welds Magnetic particle testing EN ISO 23278 March 2015 ICS 25.160.40 Supersedes EN ISO 23278:2009English Version Non-destructive testing of welds - Magnetic particle testing - Acceptance levels (ISO 23278:2015) Contrle non destructif des assemblages souds - Contrle pa
10、r magntoscopie - Niveaux dacceptation (ISO 23278:2015) Zerstrungsfreie Prfung von Schweiverbindungen - Magnetpulverprfung von Schweiverbindungen - Zulssigkeitsgrenzen (ISO 23278:2015) This European Standard was approved by CEN on 8 November 2014. CEN members are bound to comply with the CEN/CENELEC
11、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 obtained on application to the CEN-CENELEC Management Centre or to
12、 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 CEN-CENELEC Management Centre has the same status as the officia
13、l versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, No
14、rway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 2
15、3278 EEUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMContents Page Foreword . 3 1 Scope . 4 2 Normative references. 4 3 Terms and definitions 4 4 Testing parameters 4 5 Acceptance levels 5 5.1 General 5
16、 5.2 Removal of imperfections . 5 Annex A (informative) Recommended testing parameters 6 Bibliography 7 2DIN EN ISO 23278:2015-06 EN ISO 23278:2015 (E) Foreword This document (EN ISO 23278:2015) has been prepared by Technical Committee ISO/TC 44 Welding and allied processes in collaboration with Tec
17、hnical Committee CEN/TC 121 “Welding and allied processes” 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 endorsement, at the latest by September 2015, and conflicting national standar
18、ds shall be withdrawn at the latest by September 2015. 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 rights. This document supersedes EN ISO
19、 23278:2009. 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, Former Yugoslav Republic of Macedonia
20、, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 23278:2015 has been approved by CEN as
21、EN ISO 23278:2015 without any modification. “”3DIN EN ISO 23278:2015-06EN ISO 23278:2015 (E)1 ScopeThis International Standard specifies acceptance levels for indications from imperfections in ferromagnetic steel welds detected by magnetic particle testing.The acceptance levels are primarily intende
22、d for use during manufacture examination.NOTE They can also be used for in-service inspection.The acceptance levels in this International Standard are based on detection capabilities that can be expected when using techniques specified in ISO 17638 and parameters recommended in Annex A. The acceptan
23、ce levels can be related to welding standards, application standards, specifications or codes. Such a relationship is shown in ISO 17635 for ISO 5817.Acceptance levels for grouped indications are not covered by this International Standard.2 Normative referencesThe following documents, in whole or in
24、 part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO/TS 18173, Non-destructive testing General t
25、erms and definitions3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO/TS 18173 and the following apply.3.1linear indicationlindication having a length greater than three times its width3.2non-linear indicationdindication having a length less than or equ
26、al to three times its width4 Testing parametersMany parameters, either individually or in combination, will affect the ability of a technique to detect imperfections of a given size and orientation with respect to the condition of the test surface.Detection of small imperfections is highly dependent
27、 on the surface condition of the weld and the detection media used. Examples of the application of these parameters to give a high probability of detection are given in Annex A.4DIN EN ISO 23278:2015-06 EN ISO 23278:2015 (E) 5 Acceptance levels5.1 GeneralThe width of the test surface shall include t
28、he weld metal and the adjacent parent metal up to a distance of 10 mm on each side.Acceptance levels prescribed for linear indications are those corresponding to the evaluation level. Indications lower than this shall not be taken into account. Acceptable indications do not have to be recorded.Any a
29、djacent indications separated by less than the major dimension of the smaller shall be assessed as a single, continuous indication.Local grinding may be used to improve the classification of all or just part of a test surface, when it is required to work to a higher detection limit than that expecte
30、d by the existing weld surface condition.Acceptance levels are given in Table 1.Table 1 Acceptance levels for indications from imperfectionsDimensions in millimetresType of indicationAcceptance levela1 2 3Linear indicationl = length of indicationl 1,5 l 3 l 6Non-linear indicationd = major axis dimen
31、siond 2 d 3 d 4aAcceptance levels 2 and 3 may be specified with a suffix “X”, which denotes that all linear indications detected shall be assessed to level 1. However, the probability of detection of indications smaller than those denoted by the original acceptance level can be low.5.2 Removal of im
32、perfectionsWhere the product specification permits, local grinding may be used to reduce or remove imperfections which are the cause of unacceptable indications. All such areas shall be re-tested and evaluated with the same magnetic system and technique.5DIN EN ISO 23278:2015-06EN ISO 23278:2015 (E)
33、Annex A (informative) Recommended testing parametersRecommended testing parameters for reliable detection of small imperfections are given in Table A.1. The surfaces are in the as-welded condition. It may be necessary to improve the surface condition, e.g. by abrasive paper or local grinding, to per
34、mit accurate interpretation of indications. The detection media are given in order of preference.Table A.1 Recommended testing parametersAcceptance level Surface condition Detection media1 Fine surface aFluorescent or colour contrast with contrast aid2 Smooth surface bFluorescent or colour contrast
35、with contrast aid3 General surface cColour contrast with contrast aid or fluo-rescent with low sensitivityaThe weld cap and parent material offer smooth clean surfaces with negligible undercut, rippling and spatter. The surface finish is typical of welds, made by automatic TIG-welding; submerged arc
36、 welding (fully mechanized) and manual metal arc welding with iron powder electrodes.bThe weld cap and parent material offer reasonably smooth surfaces with minimal undercut, rippling and spatter. The surface finish is typical of welds made by manual metal arc welding vertical downwards and MAG-weld
37、ing using argon rich gas for the capping runs.cThe weld cap and parent material are in the as-welded condition. The surface finish is typical of welds made by manual metal arc welding or MAG-welding in any position.6DIN EN ISO 23278:2015-06 EN ISO 23278:2015 (E) Bibliography1 ISO 5817, Welding Fusio
38、n-welded joints in steel, nickel, titanium and their alloys (beam welding excluded) Quality levels for imperfections2 ISO 17635, Non-destructive testing of welds General rules for metallic materials3 ISO 17638, Non-destructive testing of welds Magnetic particle testing7DIN EN ISO 23278:2015-06EN ISO 23278:2015 (E)
