Home / Standards / GB/T 37263-2018 GB/T 37263-2018 Active Prefabricated directly buried insulating plastic-steel-plastic composite pipes with polyurethane [PUR]foamed-plastics and high density polyethylene [PE]casing pipes 高密度聚乙烯外护管聚氨酯发泡预制直埋保温钢塑复合管 Standard Type GBT ICS 91.140.10 CCS P46 Status 现行 Issue Date 2018-12-28 Implementation 2019-11-01 Responsible Dept 住房城乡建设部 Drafting Unit N/A