Home / Standards / GB/T 35451.1-2017 GB/T 35451.1-2017 Active Polypropylene(PP) structure-wall piping systems for underground drainage and sewerage—Part 1：Polypropylene double wall corrugated pipes 埋地排水排污用聚丙烯（PP）结构壁管道系统 第1部分：聚丙烯双壁波纹管材 Standard Type GBT ICS 83.140.30 CCS G33 Status 现行 Issue Date 2017-12-29 Implementation 2018-07-01 Responsible Dept 中国轻工业联合会 Drafting Unit N/A