Prefabricated directly buried insulating plastic-steel-plastic composite pipes with polyurethane(PUR) foamed-plastics and high density polyethylene(PE) casing pipes
全国城镇供热标准化技术委员会(SAC/TC 455)
本标准规定了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的术语和定义、产品结构、材料、要求、试验方法、检验规则、标志、运输和贮存等。
本标准适用于供热(冷)及生活热水输送系统使用的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的制造和检验。
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