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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 12814-5:2000 The Eu
2、ropean Standard EN 12814-5:2000 has the status of a British Standard ICS 25.160.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Testing of welded joints of thermoplastics semi-finished products Part 5: Macroscopic examination Licensed Copy: sheffieldun sheffieldun, na, Sat
3、Oct 28 07:03:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard, having been prepared under the direction of the Sector Committee for Materials and Chemicals, was published under the authority of the Standards Committee and comes into effect on 15 November 2000 BSI 11-2000 ISBN 0 58
4、0 36541 7 BS EN 12814-5:2000 Amendments issued since publication Amd. No.DateComments National foreword This British Standard is the official English language version of EN 12814-5:2000. The UK participation in its preparation was entrusted to Technical Committee PRI/80, Welding thermoplastics, whic
5、h has the responsibility to: aid enquirers to understand the text; present to the responsible 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 UK. A
6、list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled Internati
7、onal Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British
8、 Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 6, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document
9、was last issued. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:03:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12814-5 July 2000 ICS 25.160.40 English version Testing of welded joints of thermoplastics semi-finished products - Part 5:
10、 Macroscopic examination Essai des assemblages souds sur produits semi-finis en thermoplastiques - Partie 5: Examen macroscopique Prfen von Schweiverbindungen aus thermoplastischen Kunststoffen - Teil 5: Makroskopische Untersuchung This European Standard was approved by CEN on 24 June 2000. CEN memb
11、ers 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 obtained on applicati
12、on to the Central Secretariat 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 Central Secretariat has the s
13、ame status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR
14、 STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Central Secretariat: rue de Stassart, 36 B-1050 Brussels 2000 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12814-5:2000 E Licensed Copy: sheffieldun s
15、heffieldun, na, Sat Oct 28 07:03:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 2 EN 12814-5:2000 Contents Page Foreword3 1Scope 4 2Normative references 4 3Terms and definitions4 4Principle of the test4 5Purpose of the test 4 6Cutting of test specimens.5 7Test procedure.5 7.1General5 7.2Test spe
16、cimen preparation.5 7.3Surface finish .6 8Examination6 9Test report 6 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:03:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 3 EN 12814-5:2000 Foreword This European Standard has been prepared by Technical Committee CEN/TC 249 “Plastics“, the
17、secretariat of which is held by IBN. 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 January 2001, and conflicting national standards shall be withdrawn at the latest by January 2001. According to
18、 the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain
19、, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:03:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 12814-5:2000 1 Scope This standard specifies the cutting and preparation of test specimens and the conditions for performing the macrosco
20、pic examination of the test specimens. The test is applicable to welded assemblies made from thermoplastics materials filled or unfilled, using the following processes : ? hot gas welding : round nozzle, high speed nozzle, wedge ; ? extrusion welding ; ? heated tool welding : butt, saddle, socket, w
21、edge ; ? electrofusion welding : socket, saddle. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dat
22、ed 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. For undated references the latest edition of the publication referred to applies (including amendments). prEN 13067:1999, Plastic
23、s welding personnel Approval testing of welders - Thermoplastics welded assemblies. 3 Terms and definitions For the purposes of this standard, the following definition applies : 3.1 macroscopic examination examination of a test specimen by the naked eye, or under low magnification, with or without e
24、tching 4 Principle of the test Macroscopic examination is used to reveal the macroscopic features of a welded joint, usually by the examination of transverse sections. 5 Purpose of the test The purpose of macroscopic examination shall be to assess features as described in table 1. The features to be
25、 examined shall be given in the corresponding quality level standard. Imperfections are defined by a reference number. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:03:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 5 EN 12814-5:2000 Table 1 Guidelines for assessment of features by ma
26、croscopic examination Features Reference number of imperfection Macroscopic examination without etching Macroscopic examination with etching Notes (if any) Cracks1AAAA(X)X Cavities2AAAAXX Inclusions3AAAAXX Lack of fusion4BAAA-(X) Incomplete penetration4CAAA(X)(X) Imperfect shape5AAAAXX Joint prepara
27、tion6AAAAXX Welding zone-(X)X HAZ a) Welding process-XX NOTEX means features revealed ; (X) means features which may or may not be revealed - means features not revealed. a) Heat affected zone. 6 Cutting of test specimens Testing usually applies to test specimens oriented perpendicular to the weld a
28、xis (transverse section) including the weld deposit and heat affected zones on both sides of the weld. Test specimens may also be cut at other orientations to the weld axis. The location, orientation and number of sections should be as specified in the relevant standards such as prEN 13067:1999 and/
29、or specifications or by special agreements. 7 Test procedure 7.1 General The following information shall be given before the preparation of the test specimen : ? parent and weld materials ; ? purpose of the test. 7.2 Test specimen preparation The test specimen shall be cut and prepared for examinati
30、on by producing a smooth surface. This can be achieved by planing, polishing or similar technique. If polishing is used, the polishing material shall be of several grades up to and at least grade 1000 (e.g. 180 - 320 - 600 and 1000). The surface to be examined shall not be adversely influenced by th
31、ese processes. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:03:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 6 EN 12814-5:2000 7.3 Surface finish The surface to be examined can be submitted to a treatment in order to highlight the welded zone and possibly the imperfections which ma
32、y be present. The following methods can be used : ? heat the surface (e.g. using hot air flow, radiant heat, etc.) ; ? etching the surface with a specific etchant ; The etchants used for thermoplastics are often toxic. Therefore, etching should only be performed by a trained person, following releva
33、nt safety regulations. 8 Examination The prepared surface shall be examined under a magnification between 1 and 10. 9 Test report The test report shall refer to this standard and it shall include at least the following information : a) description and identification of the test piece and test specim
34、ens ; b) surface finish ; c) surface treatment method if applicable (heat source, etchant, etching time, .) ; d) purpose of the test ; e) type of welded joint ; f) magnification ; g) result(s) of examination ; h) name and signature of the responsible person for the test report. Licensed Copy: sheffi
35、eldun sheffieldun, na, Sat Oct 28 07:03:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:03:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 12814-5:2000 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | |
36、 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Institution BSI is the independent national body responsible for
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