Home / Standards / GB/T 46437-2025 GB/T 46437-2025 Active Plastic-dipped composite steel pipes for industrial piping 工业管道用浸塑复合钢管 Standard Type GBT ICS 77.140.75 CCS H48 Status 现行 Issue Date 2025-10-31 Implementation 2026-05-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A