Home / Standards / GB/T 38105-2019 GB/T 38105-2019 Active Urban heating—Steel jacket prefabricated directly buried pipes and fittings with vacuum insulating layers 城镇供热 钢外护管真空复合保温预制直埋管及管件 Standard Type GBT ICS 91.140.10 CCS P46 Status 现行 Issue Date 2019-10-18 Implementation 2020-09-01 Responsible Dept 住房城乡建设部 Drafting Unit N/A