CEN/TC 249/SC 5/WG 8 - Imperfections in thermoplastic welded joints
Preparation of European standards for the descritpion of imperfections in thermoplastic welded joints and the setting of quality levels.
Imperfections in thermoplastic welded joints
Preparation of European standards for the descritpion of imperfections in thermoplastic welded joints and the setting of quality levels.
General Information
Frequently Asked Questions
CEN/TC 249/SC 5/WG 8 is a Subcommittee within the European Committee for Standardization (CEN). It is named "Imperfections in thermoplastic welded joints" and is responsible for: Preparation of European standards for the descritpion of imperfections in thermoplastic welded joints and the setting of quality levels. This committee has published 1 standards.
CEN/TC 249/SC 5/WG 8 develops CEN standards. The scope of work includes: Preparation of European standards for the descritpion of imperfections in thermoplastic welded joints and the setting of quality levels. Currently, there are 1 published standards from this subcommittee.
The European Committee for Standardization (CEN) is a public standards organization that brings together the national standardization bodies of 34 European countries. CEN provides a platform for developing European Standards (ENs) and other technical documents in relation to various products, materials, services, and processes, supporting the European Single Market.
A Subcommittee (SC) in CEN operates under a Technical Committee and focuses on a specific subset of the TC's scope. Subcommittees develop standards and technical specifications in their specialized area, reporting to their parent Technical Committee. They may also have working groups for detailed technical work.
This document specifies a classification and a description of imperfections likely to be encountered in thermoplastic welded joints.
This document applies to the following welding processes:
- heated tool welding;
- electrofusion welding;
- hot gas welding;
- extrusion welding.
This document applies to the following group of materials:
- PVC-C;
- PVC-U including PVC-NI, PVC-RI, PVC-HI;
- PP including PP-B, PP-H, PP-R;
- PE;
- PVDF;
- ECTFE;
- FEP;
- PFA.
This document is not concerned with the search for the possible influence of these defects on the behaviour of joints in relation to the different types of stress to which the latter may be subjected or on method for preventing such defects.
It cannot therefore be used for the acceptance of welds which is defined in quality level standards (see [1]).
Only defects giving rise to discontinuities of materials or changes in shape are taken into consideration in this document, specifying their type, their shape and their positions, without however always indicating their origin or their causes.
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