Home / Standards / GB/T 8891-2025 GB/T 8891-2025 Active Copper and copper alloy tube for heat radiator 铜及铜合金散热管 Standard Type GBT ICS 77.150.30 CCS H62 Status 现行 Issue Date 2025-10-31 Implementation 2026-05-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A