Home / Standards / GB/T 20173 GB/T 20173 Active Valves for petroleum and natural gas industries 石油天然气工业用阀门 Standard Type GBT ICS 75.180.10 CCS E92 Status 现行 Issue Date 2025-10-31 Implementation 2026-05-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委