Home / Standards / GB/T 27890-2011 GB/T 27890-2011 Active Marine cryogenic stainless steel socket welding fittings 船用超低温不锈钢承插焊接头 Standard Type GBT ICS 47.020.30 CCS U55 Status 现行 Issue Date 2011-12-30 Implementation 2012-05-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委