1、March 2017 English price group 12No 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 25.160.40!%bV“2635156www.din.deDIN
2、 EN ISO 17638Nondestructive testing of welds Magnetic particle testing (ISO 17638:2016);English version EN ISO 17638:2016,English translation of DIN EN ISO 17638:2017-03Zerstrungsfreie Prfung von Schweiverbindungen Magnetpulverprfung (ISO 17638:2016);Englische Fassung EN ISO 17638:2016,Englische ber
3、setzung von DIN EN ISO 17638:2017-03Contrle non destructif des assemblages souds Magntoscopie (ISO 17638:2016);Version anglaise EN ISO 17638:2016,Traduction anglaise de DIN EN ISO 17638:2017-03SupersedesDIN EN ISO 17638:201003www.beuth.deDocument comprises 23 pagesDTranslation by DIN-Sprachendienst.
4、In case of doubt, the German-language original shall be considered authoritative.03.17 DIN EN ISO 17638:2017-03 2 A comma is used as the decimal marker. National foreword This document (EN ISO 17638:2016) has been prepared by Technical Committee ISO/TC 44 “Welding and allied processes” in collaborat
5、ion with Technical Committee CEN/TC 121 “Welding and allied processes” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-08-24 AA Elektrische und magnetisch
6、e Prfverfahren. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 3059 DIN EN ISO 3059 ISO 9712 DIN EN ISO 9712 ISO 9934-1:2015 DIN EN ISO 9934-1:2015-12 ISO 9934-2 DIN EN ISO 9934-2 ISO 9934-3 DIN EN ISO 9934-3 ISO 12707 DIN EN ISO 12707
7、 ISO 17635 DIN EN ISO 17635 ISO 23278 DIN EN ISO 23278 Amendments This standard differs from DIN EN ISO 17638:2010-03 as follows: a) in Clause 2 “Normative references”, a reference has been added; b) 5.4 has been editorially revised; c) 5.7.2 has been editorially revised and completed; d) in A.1, co
8、ntrasting between the colour and the detection medium is dealt with. Previous editions DIN EN 1290: 1998-03, 2002-09 DIN EN ISO 17638: 2010-03 DIN EN ISO 17638:2017-03 3 National Annex NA (informative) Bibliography DIN EN ISO 3059, Non-destructive testing Penetrant testing and magnetic particle test
9、ing Viewing conditions DIN EN ISO 9712, Non-destructive testing Qualification and certification of NDT personnel DIN EN ISO 9934-1:2015-12, Non-destructive testing Magnetic particle testing Part 1: General principles (ISO 9934-1:2015) DIN EN ISO 9934-2, Non-destructive testing Magnetic particle test
10、ing Part 2: Detection media DIN EN ISO 9934-3, Non-destructive testing Magnetic particle testing Part 3: Equipment DIN EN ISO 12707, Non-destructive testing Magnetic particle testing Vocabulary DIN EN ISO 17635, Non-destructive testing of welds General rules for metallic materials DIN EN ISO 23278,
11、Non-destructive testing of welds Magnetic particle testing Acceptance levels DIN EN ISO 17638:2017-03 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 17638 November 2016 ICS 25.160.40 Supersedes EN ISO 17638:2009English Version Non-destructive testing of w
12、elds - Magnetic particle testing (ISO 17638:2016) Contrle non destructif des assemblages souds - Magntoscopie (ISO 17638:2016) Zerstrungsfreie Prfung von Schweiverbindungen - Magnetpulverprfung (ISO 17638:2016) This European Standard was approved by CEN on 2 October 2016. CEN members are bound to co
13、mply 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 obtained on application to the CEN-CENEL
14、EC 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 CEN-CENELEC Management Centre has the
15、same status as the official 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, Luxembou
16、rg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2
17、016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 17638:2016 EEuropean foreword .31 Scope . 52 Normative references 53 Terms and definitions . 54 Safety precautions 55 General 55.1 Information required prior to testing . 55.2
18、 Additional pre-test information . 65.3 Personnel qualification 65.4 Surface conditions and preparation . 65.5 Magnetizing . 65.5.1 Magnetizing equipment . 65.5.2 Verification of magnetization 75.6 Application techniques 75.6.1 Field directions and testing area 75.6.2 Typical magnetic testing techni
19、ques . 105.7 Detection media 135.7.1 General. 135.7.2 Verification of detection media performance 135.8 Viewing conditions . 145.9 Application of detection media 145.10 Overall performance test . 145.11 False indications . 145.12 Recording of indications 145.13 Demagnetization 155.14 Test report 15A
20、nnex A (informative) Variables affecting the sensitivity of magnetic particle testing .17Bibliography .19Contents PageDIN EN ISO 17638:2017-03 EN ISO 17638:2016 (E)2Foreword .4European foreword This document (EN ISO 17638:2016) has been prepared by Technical Committee ISO/TC 44 “Welding and allied p
21、rocesses” in collaboration with Technical 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 May 2017, and
22、 conflicting national standards shall be withdrawn at the latest by May 2017. 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 doc
23、ument supersedes EN ISO 17638:2009. 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 Yugosla
24、v Republic of Macedonia, 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 17638:2016 has b
25、een approved by CEN as EN ISO 17638:2016 without any modification. DIN EN ISO 17638:2017-03 EN ISO 17638:2016 (E)3 ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standard
26、s 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 ISO, also take
27、part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In parti
28、cular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of th
29、is document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www
30、.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the
31、 World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.The committee responsible for this document is ISO/TC 44, Welding and allied processes, Subcommittee SC 5, Testing and inspection of welds.This second edition canc
32、els and replaces the first edition (ISO 17638:2003), which has been technically revised.Requests for official interpretations of any aspect of this document should be directed to the Secretariat of ISO/TC 44/SC 5 via your national standards body. A complete listing of these bodies can be found at ww
33、w.iso.org.DIN EN ISO 17638:2017-03 EN ISO 17638:2016 (E)4 1 ScopeThis document specifies techniques for detection of surface imperfections in welds in ferromagnetic materials, including the heat affected zones, by means of magnetic particle testing. The techniques are suitable for most welding proce
34、sses and joint configurations. Variations in the basic techniques that will provide a higher or lower test sensitivity are described in Annex A.This document does not specify acceptance levels of the indications. Further information on acceptance levels for indications may be found in ISO 23278 or i
35、n product or application standards.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of
36、the referenced document (including any amendments) applies.ISO 3059, Non-destructive testing Penetrant testing and magnetic particle testing Viewing conditionsISO 9934-1:2015, Non-destructive testing Magnetic particle testing Part 1: General principlesISO 9934-2, Non-destructive testing Magnetic par
37、ticle testing Part 2: Detection mediaISO 9934-3, Non-destructive testing Magnetic particle testing Part 3: Equipment3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 12707 and ISO 17635 apply.ISO and IEC maintain terminological databases for use in stan
38、dardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp4 Safety precautionsSpecial consideration shall be given to toxic, inflammable and/or volatile materials, electrical safety and unfiltere
39、d UV radiation.Magnetic particle testing often creates high magnetic fields close to the object under test and the magnetising equipment. Items sensitive to these fields should be excluded from such areas.5 General5.1 Information required prior to testingPrior to testing, the following items shall b
40、e specified (where applicable):a) specific test procedure;b) certification requirements for NDT personnel;DIN EN ISO 17638:2017-03 EN ISO 17638:2016 (E)5 c) extent of coverage;d) state of manufacture;e) testing techniques to be used;f) overall performance test;g) any demagnetization;h) acceptance le
41、vel;i) action necessary for unacceptable indications.5.2 Additional pre-test informationPrior to testing, the following additional information can also be required:a) type and designation of the parent and weld materials;b) welding process;c) location and extent of welds to be tested;d) joint prepar
42、ation and dimensions;e) location and extent of any repairs;f) post-weld treatment (if any);g) surface conditions.Operators may ask for further information that could be helpful in determining the nature of any indications detected.5.3 Personnel qualificationMagnetic particle testing of welds and the
43、 evaluation of results for final acceptance shall be performed by qualified and capable personnel. It is recommended that personnel be qualified in accordance with ISO 9712 or an equivalent standard at an appropriate level in the relevant industry sector.5.4 Surface conditions and preparationAreas t
44、o be tested shall be dry unless appropriate products for wet surfaces are used. It may be necessary to improve the surface condition, e.g. by use of abrasive paper or local grinding to permit accurate interpretation of indications.Any cleaning or surface preparation shall not be detrimental to the m
45、aterial, the surface finish or the magnetic testing media. Detection media shall be used within the temperature range limitations set by the manufacturer.5.5 Magnetizing5.5.1 Magnetizing equipmentGeneral magnetization requirements shall be in accordance with ISO 9934-1:2015, Clause 8.Unless otherwis
46、e specified, for example, in an application standard, the following types of alternating current-magnetizing equipment shall be used:a) electromagnetic yokes;DIN EN ISO 17638:2017-03 EN ISO 17638:2016 (E)6 b) current flow equipment with prods;c) adjacent or threading conductors or coil techniques.DC
47、 electromagnets and permanent magnets may only be used by agreement at the time of enquiry and order.The magnetizing equipment shall conform to ISO 9934-3.Where prods are used, precautions shall be taken to minimize overheating, burning or arcing at the contact tips. Removal of arc burns shall be ca
48、rried out where necessary. The affected area shall be tested by a suitable method to ensure the integrity of the surface.5.5.2 Verification of magnetizationFor the verification of magnetization, see ISO 9934-1:2015, 8.2.For structural steels in welds, a tangential field between 2 kA/m to 6 kA/m (r.m.s.) is recommended.The adequacy of the surface flux density shall be established by one or more of the following me
