1、April 2015 Translation by DIN-Sprachendienst.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
2、77.140.80; 77.150.99!%Aa7“2306220www.din.deDDIN EN 1371-2Founding Liquid penetrant testing Part 2: Investment castings;English version EN 1371-2:2015,English translation of DIN EN 1371-2:2015-04Gieereiwesen Eindringprfung Teil 2: Feingussstcke;Englische Fassung EN 1371-2:2015,Englische bersetzung vo
3、n DIN EN 1371-2:2015-04Fonderie Contrle par ressuage Partie 2: Pices en moulage de prcision (cire perdue);Version anglaise EN 1371-2:2015,Traduction anglaise de DIN EN 1371-2:2015-04SupersedesDIN EN 1371-2:1998-07www.beuth.deDocument comprises 21 pagesIn case of doubt, the German-language original s
4、hall be considered authoritative.03.15DIN EN 1371-2:2015-03 2 A comma is used as the decimal marker. National foreword This document (EN 1371-2:2015) has been prepared by Technical Committee CEN/TC 190 “Foundry technology” (Secretariat: DIN, Germany). The responsible German body involved in its prep
5、aration was the DIN-Normenausschuss Gieereiwesen (DIN Standards Committee Foundry Practice), Working Committee NA 036-00-03 AA Prfverfahren fr Gusswerkstoffe. Amendments This standard differs from DIN EN 1371-2:1998-07 as follows: a) structure and wording have been brought in line with EN 1371-1; b)
6、 section thickness ranges for linear and aligned indications have been deleted; c) in Table 1 (former Table 2), the maximum dimension of indication for severity levels CP 5, CP 6 and CP 7 has been increased; d) Table 2 (former Table 3) has been modified (section thickness ranges have been deleted an
7、d two new severity levels have been added); e) the former Table 4 is now Table 3; f) a new Annex A has been added giving the conversion from the severity levels specified in EN 1371-2:1998, Table 3, to severity levels given in Table 2 of the present standard; g) the former Table 1 is now Annex B; h)
8、 Annex C “Reference figures Non-linear clustered indications designated CP” has been added; i) Annex D “Reference figures Linear and aligned indications designated LP and AP” has been added; j) Annex E “Model of a liquid penetrant test report” has been added. Previous editions DIN EN 1371-2: 1998-07
9、 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1371-2 January 2015 ICS 77.140.80; 77.150.99 Supersedes EN 1371-2:1998English Version Founding - Liquid penetrant testing - Part 2: Investment castings Fonderie - Contrle par ressuage - Partie 2: Pices en moulage de prcision (cire perdue) Gieerei
10、wesen - Eindringprfung - Teil 2: FeingussstckeThis European Standard was approved by CEN on 12 December 2014. 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 alter
11、ation. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC 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
12、 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 official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estoni
13、a, Finland, Former Yugoslav 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 United Kingdom. EUROPEAN COMMITTEE FOR STANDA
14、RDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG 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 1371-2:2015 EEN 1371-2:2015 (E) 2 Content
15、s Page Foreword 3 Introduction .4 1 Scope 5 2 Normative references 5 3 Conditions for liquid penetrant testing .5 4 Method of testing .6 4.1 Operating mode .6 4.2 Qualification of the operators .6 4.3 Surface preparation .6 4.4 Viewing conditions 6 5 Acceptance criteria 6 5.1 Indications of disconti
16、nuities .6 5.2 Definition of liquid penetrant indications 7 5.3 Severity levels 7 6 Classification of the indications and interpretation of results .8 7 Retesting .8 8 Post cleaning and protection .8 9 Test report 9 Annex A (informative) Indicative conversion of severity levels of linear (LP) and al
17、igned (AP) indications . 11 Annex B (informative) Nature of discontinuities and types of corresponding liquid penetrant indications . 12 Annex C (informative) Reference figures Non-linear clustered indications designated CP . 13 Annex D (informative) Reference figures Linear and aligned indications
18、designated LP and AP . 14 Annex E (informative) Model of a liquid penetrant test report. 15 Annex F (informative) Significant technical changes between this European Standard and the previous edition 18 Bibliography . 19 DIN EN 1371-2:2015-03 EN 1371-2:2015 (E) 3 Foreword This document (EN 1371-2:20
19、15) has been prepared by Technical Committee CEN/TC 190 “Foundry technology”, 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 July 2015, and conflicting na
20、tional standards shall be withdrawn at the latest by July 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 supersed
21、es EN 1371-2:1998. Within its programme of work, Technical Committee CEN/TC 190 requested CEN/TC 190/WG 11 “Surface inspection“ to revise the following standard: EN 1371-2:1998, Founding Liquid penetrant inspection Part 2: Investment castings This is one of two European Standards for liquid penetran
22、t testing for castings. The other standard is: EN 1371-1, Founding Liquid penetrant testing Part 1: Sand, gravity die and low pressure die castings. Annex F provides details of significant technical changes between this European Standard and the previous edition. According to the CEN-CENELEC Interna
23、l 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, France, Germany, Greece, Hungary, Iceland, Irel
24、and, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 1371-2:2015-03 EN 1371-2:2015 (E) 4 Introduction This European Standard complements the general principles of liquid
25、 penetrant testing given in EN ISO 3452-1 for the additional requirements for investment castings. The structure of this European Standard is similar to that of EN 1371-1:2011, Founding Liquid penetrant testing Part 1: Sand, gravity die and low pressure die castings 1. It has been written to take ac
26、count of the difference of dimension of the reference area and the difference of nature of discontinuities with regard to other casting processes for which EN 1371-1 is applicable. Liquid penetrant testing as well as any other non-destructive examination method is part of a general or specific asses
27、sment of the quality of a casting to be agreed between the manufacturer and the purchaser at the time of acceptance of the order. DIN EN 1371-2:2015-03 EN 1371-2:2015 (E) 5 1 Scope This European Standard specifies a liquid penetrant testing method for castings produced by investment casting for gene
28、ral purposes. NOTE Investment casting is sometimes referred to as lost-wax casting. This European Standard applies to all cast metals, except copper-tin and/or copper-tin-lead alloy castings, where copper is the major constituent (see EN 1982 3). 2 Normative references The following documents, in wh
29、ole or in 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. EN 1370, Founding Examination of surf
30、ace condition EN 4179, Aerospace series Qualification and approval of personnel for non-destructive testing EN ISO 3059, Non-destructive testing Penetrant testing and magnetic particle testing Viewing conditions (ISO 3059) EN ISO 3452-1, Non-destructive testing Penetrant testing Part 1: General prin
31、ciples (ISO 3452-1) EN ISO 3452-2, Non-destructive testing Penetrant testing Part 2: Testing of penetrant materials (ISO 3452-2) EN ISO 3452-5, Non-destructive testing Penetrant testing Part 5: Penetrant testing at temperatures higher than 50 degrees C (ISO 3452-5) EN ISO 3452-6, Non-destructive tes
32、ting Penetrant testing Part 6: Penetrant testing at temperatures lower than 10 degrees C (ISO 3452-6) EN ISO 9712, Non-destructive testing Qualification and certification of NDT personnel (ISO 9712) 3 Conditions for liquid penetrant testing The manufacturing stage(s) when liquid penetrant testing is
33、 to be performed shall be clearly defined by agreement between the manufacturer and the purchaser by the time of ordering. The methods detailed in this standard shall only apply to the agreed surfaces of castings and the percentage or number of castings to be checked. For each agreed area of the cas
34、ting to be inspected, the following shall be indicated: type of discontinuity; severity level. This information enables the manufacturer to assess the additional testing and operations involved. Sensitivity can differ depending on the method of liquid penetrant testing selected and surface condition
35、s, the application of the casting (e.g. increased wear, safety related component) and its manufacture stage. Therefore the liquid penetrants used and the method agreed shall fit to detect the minimum required severity level. DIN EN 1371-2:2015-03 EN 1371-2:2015 (E) 6 The type of discontinuity and th
36、e severity level can vary depending on the area of the casting inspected (see Table 1 and Table 2). The conversion from the severity levels specified in EN 1371-2:1998, Table 3 2, to the severity levels specified in Table 2 of the present edition is given in Table A.1. 4 Method of testing 4.1 Operat
37、ing mode Testing shall be carried out as described in EN ISO 3452-1, EN ISO 3452-2, EN ISO 3452-5 and EN ISO 3452-6. The characteristics of the penetrant materials shall be checked in accordance with specifications to be agreed between the manufacturer and the purchaser. 4.2 Qualification of the ope
38、rators Testing shall be performed by qualified personnel. The level of qualification shall be agreed between the contracting parties (e.g. EN ISO 9712, or EN 4179, or a similar certification scheme). 4.3 Surface preparation The surface to be inspected shall be clean, free from rust, scale, moulding
39、residues, oil, grease, paint or any other contaminant which can interfere with a correct testing. The surface to inspect shall be cleaned by using mechanical or chemical methods, or a combination of these. Shot blasting is not recommended prior to liquid penetrant testing. If shot blasting is necess
40、ary, it shall be as light as possible, in order to avoid sealing or closing up possible discontinuities. If the risk of sealing or closing up possible discontinuities is unacceptable then blasting shall be followed by chemical etching in order to enable detection of discontinuities. The chemical com
41、position of the etching bath and other parameters such as concentration, temperature, immersion time neutralizing and rinsing, if applicable, shall be recorded. To detect the smallest indication to be considered, the surface finish shall be in accordance with Table 3, unless otherwise specified at t
42、he time of ordering. The assessment of surface finish should be carried out using a visual cast-surface roughness comparator; see EN 1370. 4.4 Viewing conditions The examination of the indications shall be carried out with the naked eye or at a minimum magnification of 3 and viewing conditions in co
43、nformity with EN ISO 3059. 5 Acceptance criteria 5.1 Indications of discontinuities 5.1.1 General The indication of discontinuities can be non-linear (isolated or clustered), aligned or linear. Although liquid penetrant testing cannot generally be used to determine the size of detected discontinuiti
44、es, it allows discontinuities to be assessed by measurement of the length L of the indication. In the following clauses: L indicates length; W indicates width; P indicates liquid penetrant; DIN EN 1371-2:2015-03 EN 1371-2:2015 (E) 7 SP indicates non-linear isolated indication; CP indicates non-linea
45、r clustered indication; AP indicates aligned indication; LP indicates linear indication. NOTE Based on the principle of the test method, the operator evaluates the size of the indications, not the real size of discontinuities. 5.1.2 Criteria The physical discontinuities shall give either a non-linea
46、r, linear or aligned liquid penetrant testing indication. The various types of penetrant indication can correspond to the discontinuities (A, B, C, etc.) shown in Annex B. 5.2 Definition of liquid penetrant indications a) Linear indication (LP). An indication with a largest dimension three or more t
47、imes its smallest dimension (i.e. L 3 W); b) Non-linear indication. An indication with a largest dimension less than three times its smallest dimension (i.e. L 50 mm LP 01 AP 01 LP 1 AP 1 1 1 1 LP 2 AP 2 2 LP 3 AP 3 3 2 LP 4 AP 4 4 2 LP 5 AP 5 5 3 LP 6 AP 6 6 4 3 LP 7 AP 7 5 LP 8 AP 8 6 4 LP 8 AP 8
48、5 6 DIN EN 1371-2:2015-03 EN 1371-2:2015 (E) 12 Annex B (informative) Nature of discontinuities and types of corresponding liquid penetrant indications Table B.1 Nature of discontinuities and types of corresponding liquid penetrant indications Nature of discontinuities Symbol Types of liquid penetra
49、nt indications non-linear linear aligned isolated SP clustered CP LP AP Gas porosity A X X X Sand and/or slag inclusions (other than alumina) B X X X Shrinkage C X X X X Cracks D X X Hot tears E X X Inserts F X X X Laps and cold shuts H X X Presence of aluminium oxides (alumina) or magnesium oxidesaJ X X Other inclusions (shell) N X X X aFor aluminium alloy or magnesium alloy castings only. DIN EN 1371-2:2015-03 EN 1371-2:2015 (E
