ICS 83.140.30 CCS G 33 GB 中华人民共和国国家标准 GB/T41422—2022 压力输水用取向硬聚氯乙烯(PVC-O) 管材和连接件 Oriented unplasticized poly(vinyl chloride)(PVC-O) pipes and joints for the conveyance of water under pressure [ISO16422:2014,Pipes and joints made of oriented unplasticizedpoly (vinylchloride)(PvC-O)for theconveyance ofwater underpressure- Specifications,NEQ 2022-04-15发布 2022-11-01实施 国家市场监督管理总局 发布