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
Preformed directly buried insulating pipes for polyurethane (PUR) foamed plastics and glass fiber reinforced plastics protect layers
2001-02-05
T/SDAS 839-2024
聚氯乙烯外护管硬质聚氨酯泡沫塑料预制直埋保温管及管件
2024-05-24
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 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