DIN V ENV 1453-2-2001 清除建筑物内部尘土和废物(低温和高温)用带结构管壁的塑料管道系统.未增塑聚氯乙烯(PVC-U).第2部分:合格评定指南
Plastics piping systems with structured wall pipes for soil and waste discharge (low and high temperature) inside buildings - Unplasticized poly(vinyl chloride) (PVC-U) - Part 2: Guidance for the assessment of conformity; German version ENV 1453-2:2000