SOUTH AFRICAN NATIONAL STANDARD

Transcription

1 ISBN SOUTH AFRICAN NATIONAL STANDARD Welding of thermoplastics Testing and approval of welders WARNING This document references other documents normatively. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001 Tel: Fax: SABS

2 Table of changes Change No. Date Scope Amdt Amended to be aligned with international specifications for polyethylene pipes, to update referenced standards, and to replace withdrawn referenced standards. Amdt Amended to change the designation of SABS standards to SANS standards, and to update normative references. Amdt Amended to update referenced standards. Amdt Amended to remove reference to a South African qualification and certification committee. Acknowledgement The SABS Standards Division wishes to acknowledge the valuable assistance derived from publications of the following organizations: DIN (Deutches Institut für Normung e.v.) Deutsche Verband für Schweisstechnik (German Welding Engineering Association) Foreword This South African standard was approved by SABS/TC 1041, Welding of thermoplastics, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This document was approved for publication in March This document supersedes SANS 10269:2009 (edition 1.3). A vertical line in the margin shows where the text has been technically modified by amendment No. 4. Annexes A to F form an integral part of this document. Annex G is for information only.

3 Contents Page Acknowledgement Foreword 1 Scope Normative references Definitions and abbreviations Witnessing the testing of welders Admission of a welder to a test Testing of skill and knowledge Welding of test pieces Preparation of test pieces and test specimens Assessment and evaluation of test pieces and test specimens Substitute test pieces and test specimens Test results Failing the test Test certificate Annual repeat tests... 8 Annex A Plastics welder's test certificate (SANS 10269) Annex B Evaluation record form for a plastics welder test for the WE, WF and WZ welding processes Annex C Evaluation record form for a plastics welder test for the HD welding process Annex D Evaluation record form for a plastics welder test for the HM welding process Annex E Evaluation record form for a plastics welder test for the HS welding process Annex F Evaluation record form for a plastics welder test for the SW welding process Annex G Bibliography

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5 Welding of thermoplastics Testing and approval of welders 1 Scope 1.1 This standard covers the testing and certification of welders who carry out certified welding of thermoplastics in new constructions, modifications and repairs. 1.2 This standard applies to the hot-gas, hot-gas extrusion, heated-tool, electrofusion and solvent welding processes. 1.3 The implementation of this standard ensures that the testing of welders will be carried out under uniform conditions and that the competence of a certified welder is such that it will comply with the minimum acceptable requirements. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this standard. All standards are subject to revision and, since any reference to a standard is deemed to be a reference to the latest edition of that standard, parties to agreements based on this standard are encouraged to take steps to ensure the use of the most recent editions of the standards indicated below. Information on currently valid national and international standards can be obtained from the SABS Standards Division. ISO 10931, Plastics piping systems for industrial applications Poly(vinylidene fluoride) (PVDF) Specifications for components and the system. Amdt 2 ISO , Plastics Unplasticized poly(vinyl chloride) sheets Types, dimensions and characteristics Part 1: Sheets of thickness not less than 1 mm. Amdt 2 ISO 14632, Extruded sheets of polyethylene (PE-HD) Requirements and test methods. Amdt 2 ISO 15013, Plastics Extruded sheets of polypropylene (PP) Requirements and test methods. Amdt 2 SANS 791, Unplasticized poly(vinyl chloride) (PVC-U) sewer and drain pipes and pipe fittings. SANS 966-1, Components of pressure pipe systems Part 1: Unplasticized poly(vinyl chloride) (PVC-U) pressure pipe systems. Amdt 1 SANS 967, Unplasticized poly(vinyl chloride) (PVC-U) soil, waste and vent pipes and pipe fittings. SANS 1315, Polypropylene pressure pipes. Amdt 3 3