GB/T 19471.1-2004

Plastics piping systems--Elastomeric-sealing-ring-type socket joints for use with unplasticized poly(vinyl chloride)(PVC-U)pipes--Test method forleaktighness under internal pressure and angular deflection

塑料管道系统 硬聚氯乙烯(PVC-U)管材弹性密封圈式承口接头 偏角密封试验方法