Home / Standards / GB/T 28712.3-2023 GB/T 28712.3-2023 Active Types and basic parameters of heat exchangers—Part 3: U-tube heat exchangers 热交换器型式与基本参数 第3部分:U形管式热交换器 Standard Type GBT ICS 71.120.30 CCS J75 Status 现行 Issue Date 2023-09-07 Implementation 2024-01-01 Responsible Dept 国家标准委 Drafting Unit N/A