Home / Standards / GB/T 44556-2024 GB/T 44556-2024 Active Refrigerating systems and heat pumps—Qualification of tightness of components and joints 制冷系统及热泵 部件和接头的密封性评定 Standard Type GBT ICS 27.200 CCS J 73 Status 现行 Issue Date 2024-09-29 Implementation 2025-04-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A