Home / Standards / GB/T 39997-2021 GB/T 39997-2021 Active Thermoplastic pipework for underground installation at petrol filling stations 加油站埋地用热塑性塑料复合管道系统 Standard Type GBT ICS 83.140.30 CCS G33 Status 现行 Issue Date 2021-04-30 Implementation 2021-11-01 Responsible Dept 中国轻工业联合会 Drafting Unit N/A