DIN 16963-14-1983 1型和2型高密度聚乙烯压力管道用管连接组件和接头.承插焊接用注塑减径管件与套管.尺寸
Pipe joint assemblies and fittings for types 1 and 2 high-density polyethylene (HDPE) pressure pipes; injection moulded reducers and nipples for socket welding; dimensions
Pipe joints and their elements for pipes of high density polyethylene (HDPE) under pressure;type 1 and 2, socket reducing and unions injection moulded for socket welding; dimensions