標準號：BS EN 14728-2005
中文標準名稱：熱塑焊接中的缺陷.分類
英文標準名稱：Imperfections in thermoplastic welds - Classification
標準類型：J33
發(fā)布日期：2005/12/7 12:00:00
實施日期：2005/12/7 12:00:00
中國標準分類號：J33
國際標準分類號：25.160.40
引用標準：CEN ISO/TS 17845
適用范圍：This document specifies a classification and a description of imperfections likely to be encountered in thermoplasticwelded 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 ofjoints in relation to the different types of stress to which the latter may be subjected or on method for preventingsuch 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 thisdocument, specifying their type, their shape and their positions, without however always indicating their origin ortheir causes.