Home / Standards / GB/T 34611-2017 GB/T 34611-2017 Active Rigid polyurethane spray polyethylene winding prefabricated directly buried insulating pipes 硬质聚氨酯喷涂聚乙烯缠绕预制直埋保温管 Standard Type GBT ICS 91.140.10 CCS 无 Status 现行 Issue Date 2017-10-14 Implementation 2018-09-01 Responsible Dept 住房城乡建设部 Drafting Unit N/A