BS EN ISO 13783:1998 塑料管道系统.硬聚氯乙烯(PVC-U)端部承受负荷的双承口连接件.密封和承受弯曲内压的试验方法
Plastics piping systems - Unplasticized poly(vinyl chloride) (PVC-U) end-load-bearing double-socket joints - Test method for leaktightness and strength while subjected to bending and internal pressure