DIN - DVS 2202-1
Imperfections in thermoplastic welded joints Features, description, evaluation
Organization: | DIN |
Publication Date: | 1 January 2008 |
Status: | active |
Page Count: | 27 |
ICS Code (Welded joints and welds): | 25.160.40 |
scope:
This guideline categorizes and describes, for the methods covered by the document, imperfections in thermoplastic welded joints with the objective of enabling a generally valid evaluation that takes due consideration of a system of multiple quality requirement levels. The description of the imperfections is based on the terminology defined in DIN 32502. However, the order of the descriptions has been altered in the present document.
This guideline is intended primarily for weld evaluation by visual inspection but does not exclude further tests.
New plastics or plastics developed in future may have different characteristics (e. g. bead and flash shapes). If different materials are to be welded together (e. g. PE 80 / PE 100 or fittings with an MFR considerably higher than the tubing to which they are welded) then this difference must also be taken into consideration in the evaluation.
If specific imperfections are to be excluded or kept within certain limits when welded joints are made, this can be emphasized by classification into one of the acceptance levels.
Application of the guideline and the measures necessary for conforming with it may be governed by statutory regulations, by generally recognized rules of technology, or may be based on delivery agreements.
Weld evaluation in accordance with this guideline may only be carried out by a qualified expert who has the required experience1).
1) For example, specialist for plastics welding in accordance with DVS 2213 or having equivalent qualifications.
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