高密度聚乙烯外护管聚氨酯发泡预制直埋保温复合塑料管高密度聚乙烯外护管聚氨酯发泡预制直埋保温复合塑料管Prefabricated directly buried composite insulating pipes with polyurethane (PUR) foamed-plastics and high density polyethylene (PE) casing pipes
高密度聚乙烯无缝外护管预制直埋保温管件
Prefabricated directly buried insulating fittings with seamless high density polyethylene casing pipe
2020-11-19
GB/T 38105-2019
城镇供热 钢外护管真空复合保温预制直埋管及管件
Urban heating—Steel jacket prefabricated directly buried pipes and fittings with vacuum insulating layers
2019-10-18
GB/T 29047-2021
高密度聚乙烯外护管硬质聚氨酯泡沫塑料预制直埋保温管及管件
Prefabricated directly buried insulating pipes and fittings with polyurethane foamed-plastics and high density polyethylene casing pipes
2021-08-20
GB/T 37263-2018
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
Prefabricated directly buried insulating plastic-steel-plastic composite pipes with polyurethane(PUR) foamed-plastics and high density polyethylene(PE) casing pipes
2018-12-28
GB/T 38097-2019
城镇供热 玻璃纤维增强塑料外护层聚氨酯泡沫塑料预制直埋保温管及管件
Urban heating—Prefabricated directly buried insulating pipes and fittings with polyurethane(PUR) foamed-plastics and glass fiber reinforced plastics protect layers