Home / Standards / GB/T 12227-2025 GB/T 12227-2025 Active General purpose industrial valves—Technical specification for ductile iron castings 通用阀门 球墨铸铁件技术规范 Standard Type GBT ICS 23.060.01 CCS J16 Status 现行 Issue Date 2025-10-31 Implementation 2026-05-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A