Plastics welding personnel — Qualification testing of welders — Thermoplastics welded assemblies

EN 13067:2012
Plastics welding personnel — Qualification testing of welders — Thermoplastics welded assemblies

NORME EUROPEENNE

EUROPAISCHE NORM

ICS 03.100.30; 25.160.10
EN 13067
November 2012
Supersedes EN 13067:2003

English Version
Plastics welding personnel - Qualification testing of welders -Thermoplastics welded assemblies
Personnel en soudage des plastiques - Epreuve de KunststoffschweiBpersonal - Anerkennungspriifung von
qualification des soudeurs - Assemblages soudes SchweiBem - Thenmoplastische SchweiBverbindungen
thermoplastiques
This European Standard was approved by CEN on 22 September 2012.
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 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 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, Estonia, 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 STANDARDIZATION

Management Centre: Avenue Marnix 17, B-1000 Brussels

Contents Page
Foreword 3
Introduction 4
1 Scope 5
2 Normative references 6
3 Terms and definitions 6
4 Admission to the qualification tests 8
5 Testing of skill and knowledge 9
6 Duty of Plastics Welding Examiner and invigilator 16
7 Range of qualification 16
8 Welding of test piece 16
9 Test piece and test specimens, shapes and dimensions 16
10 Evaluation and acceptance criteria of test piece(s) and test specimens 24
11 Test result and qualification test certificate 28
12 Failed test 29
13 Period of validity 29
14 Qualification test certificate renewal 30
Annex A (informative) Welding recording sheet 31
Annex В? (informative) Welders qualification tests certificate format 32
Annex C (informative) PWE evaluation sheet for practical test 33
Bibliography 42Foreword
This document (EN 13067:2012) has been prepared by Technical Committee CEN/TC249 “Plastics”, the secretariat of which is held by NBN.
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 2013, and conflicting national standards shall be withdrawn at the latest by May 2013.
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 13067:2003.
In this revision, the scope of this standards includes solvent welding: socket and covers the welding of the polypropylene (PP) lining membranes (group 9: PP).
According to the CEN/CENELEC Internal Regulations, the national standards organisations 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, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Introduction
This standard covers the principles to be observed in the qualification testing of welder performance for the welding of thermoplastic materials.
The ability of the welder to follow verbal or written instructions and testing of his skill are important factors in ensuring the quality of the welded product.
This standard is intended to provide the basis for the mutual recognition by examining bodies for qualification relating to welders competence in the various fields of application. 1 Scope
This European Standard specifies the method of testing the knowledge and skill of a welder who is required to carry out welds on thermoplastics in new constructions and repair work.
The skill examination of a welder is an essential condition for the assurance of the quality of the welding work.
The application of this standard guarantees that the examination is carried out according to a uniform test procedure.
This European Standard applies when the contractor or the authorities responsible for the application require it.
Gas and water utility network industries with alternative qualification programmes are excluded from this standard.
This European Standard applies to the following welding processes:
—? hot gas welding: round nozzle, high speed nozzle, wedge;
—? extrusion welding;
—? heated tool welding: butt, saddle, socket, wedge;
—? electrofusion welding: socket, saddle;
—? solvent welding: socket.
This European Standard applies to the welding of the following products:
—? sheet;
—? pipe;
—? fittings;
—? lining membrane.
This European Standard covers the welding of the following groups of materials:
a) for sheets, pipes and fittings:
1) group 1: PVC (including all kinds of PVC-U, PVC-C), ABS;
2) group 2: PP (including all kinds of PP);
3) group 3: PE (including all kinds of PE);
4) group4:PVDF;
5) group 5: ECTFE or PFA or FEP;
b) for lining membranes:
1) group 6: PVC-P;
2) group 7: PE (including all kinds of PE);
3) group 8: ECB;
4) group 9: PP.
2 Normative references
The following documents, in whole 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 12814-1, Testing of welded joints of thermoplastics semi-finished products — Part 1: Bend test
EN 12814-2:2000, Testing of welded joints of thermoplastics semi-finished products —Part 2: Tensile test
EN 12814-4, Testing of welded joints of thermoplastics semi-finished products — Part 4: Peel test
EN 12814-8, Testing of welded joints of thermoplastics semi-finished products —Part 8: Requirements
EN 13100-1, Non destructive testing of welded joints of thermoplastics semi-finished products — Part 1: Visual examination
EN 14728, Imperfections in thermoplastic welds — Classification
EN ISO/IEC 17024:2003, Conformity assessment — General requirements for bodies operating certification of persons (ISO/IEC 17024:2003)
EN ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories (ISO/IEC 17025)
3 Terms and definitions
For the purposes of this document, the terms and definitions from EN ISO/IEC 17024:2003 and the following apply.
3.1
AD-WLD break
failure mode in an extrusion welded membrane peel test specimen where the failure is through the weld material
3.2
certificate issuing authority
establishment responsible for approving the PWE and or the Invigilator
3.3
invigilator
qualified person approved by Certificate Issuing Authority (CIA) who can supervise the practical and theoretical tests
Note 1 to entry: 3.3 and 3.5 can be the same person.
3.4
manufacturer
company, contractor or organisation who is responsible for the welding
3.5
Plastics Welding Examiner
PWE
qualified person approved by Certificate Issuing Authority (CIA) who verifies the compliance with this standard
3.6
qualification test
theoretical and practical tests in order to verify the knowledge and the skill of the welder
3.7
range of qualification
welding processes, types of joint, materials, thicknesses and diameters for which a welder is qualified
3.8
test piece
assembly which is welded during the practical test
3.9
test specimen
part or portion cut from the test piece for the test specified
3.10
test house
establishment having all relevant test equipment to carry out the required tests and working in compliance with EN ISO/IEC 17025
3.11
training centre
educational establishment for training plastics welding personnel and/or Plastics Welding Examiner, approved by CIA
3.12
welding process
technique characterized by the method of softening to obtain permanent assembly
3.12.1
electrofusion welding
softening of fitting and pipe surfaces to be welded is obtained by means of a heating element embedded in the fitting which remain between welded joints
3.12.2
extrusion welding
welding process in which an extruder unit with a melting chamber gives the extruded material required by the thickness and shape of the joint. Hot air or inert gas heats simultaneously the parent material
3.12.3
heated tool welding
welding process in which the joint surfaces are adequately heated by exposure, through direct contact with heated elements and are welded under pressure, which includes butt fusion welding (also called hot plate welding, platen welding or mirror welding) and socket fusion welding
3.12.4
heated wedge
welding process in which the lining membrane welded is gripped by rollers which guide and propel the welding machine which uses either hot gas to heat the lining membrane and the wedge to effect the weld or electrically heated wedge to heat the lining membrane in the area being welded
3.12.5
high-speed nozzle
welding process in which the welding rod is suitably guided and pre-heated and the nozzle tip is provided with a profiled area to apply the welding pressure
3.12.6
hot gas welding
welding process in which the materials to be unified are softened by hot a