Home / Standards / GB/T 28713.1-2012 GB/T 28713.1-2012 Abolished Enhanced heat transfer elements used in tube-shell heat exchangers -Part 1：Threaded tubes 管壳式热交换器用强化传热元件 第1部分：螺纹管 Standard Type GBT ICS 23.040.10 CCS H48 Status 废止 Issue Date 2012-09-03 Implementation 2013-01-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委