Home / Standards / GB/T 20221-2006 GB/T 20221-2006 Abolished Unplasticized poly(vinyl chloride)(PVC-U) pipes for non-pressure buried drainage and sewerage systems 无压埋地排污、排水用硬聚氯乙烯(PVC-U)管材 Standard Type GBT ICS 83.140.30 CCS G33 Status 废止 Issue Date 2006-03-31 Implementation 2006-10-01 Responsible Dept 中国轻工业联合会 Drafting Unit N/A