Li ce ns ed C op y A ki n K ok sa l, B ec ht el L td , 1 2 D ec em be r 20 02 , U nc on tr ol le d C op y, ( c) B S I | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |[.]
Trang 1British Standard
A single copy of this British Standard is licensed to
Akin Koksal
12 December 2002
This is an uncontrolled copy Ensure use of the most current version of this document by searching British Standards Online at bsonline.techindex.co.uk
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12814-5:2000
The European 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 Ð
Part 5: Macroscopic examination
Trang 3This 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 0 580 36541 7
BS EN 12814-5:2000
Amendments issued since publication
Amd No Date Comments
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, which has the responsibility to:
Ð aid enquirers to understand the text;
Ð present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed;
Ð monitor related international and European developments and promulgate them in the UK
A 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 ªInternational Standards Correspondence Indexº, or by using the ªFindº 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 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 was last issued
Trang 4EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
EN 12814-5
July 2000
ICS 25.160.40
English version
Testing of welded joints of thermoplastics semi-finished products
- Part 5: Macroscopic examination
Essai des assemblages soudés sur produits semi-finis en
thermoplastiques - Partie 5: Examen macroscopique
Prüfen von Schweißverbindungen aus thermoplastischen Kunststoffen - Teil 5: Makroskopische Untersuchung
This European Standard was approved by CEN on 24 June 2000.
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 obtained on application 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 same 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 STANDARDIZATION
C O M I T É E U R O P É E N D E N O R M A L I S A T I O N
E U R O P Ä I S C H E S K O M I T E E F Ü R N O R M U N G
Central Secretariat: rue de Stassart, 36 B-1050 Brussels
© 2000 CEN All rights of exploitation in any form and by any means reserved
worldwide for CEN national Members.
Ref No EN 12814-5:2000 E
Trang 5Page 2
EN 12814-5:2000
Contents
Page
Foreword 3
1 Scope 4
2 Normative references 4
3 Terms and definitions 4
4 Principle of the test 4
5 Purpose of the test 4
6 Cutting of test specimens 5
7 Test procedure 5
7.1 General 5
7.2 Test specimen preparation 5
7.3 Surface finish 6
8 Examination 6
9 Test report 6
Trang 6Page 3
EN 12814-5:2000
Foreword
This European Standard has been prepared by Technical Committee CEN/TC 249 "Plastics", the 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 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, Sweden, Switzerland and the United Kingdom
Trang 7Page 4
EN 12814-5:2000
1 Scope
This standard specifies the cutting and preparation of test specimens and the conditions for performing the macroscopic 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, wedge ;
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 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 For undated references the latest edition of the publication referred to applies (including amendments)
prEN 13067:1999, Plastics 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 etching
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 examined shall be given in the corresponding quality level standard
Imperfections are defined by a reference number
Trang 8Page 5
EN 12814-5:2000
Table 1 — Guidelines for assessment of features by macroscopic examination
Features
Reference number of imperfection
Macroscopic examination without etching
Macroscopic examination with etching
Notes (if any)
NOTE X 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 axis (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/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 examination 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 these processes
Trang 9Page 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 may 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 relevant 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 specimens ;
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
Trang 11BS EN
12814-5:2000
BSI
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London
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