Rigid polyurethane spray polyethylene winding prefabricated directly buried insulating pipes.
全国城镇供热标准化技术委员会(SAC/TC 455)
本标准规定了采用聚氨酯喷涂工艺和聚乙烯缠绕工艺生产的硬质聚氨酯喷涂聚乙烯缠绕预制直埋保温管（简称喷涂缠绕保温管)的术语和定义、产品结构、一般规定、要求、试验方法、检验规则、标志、运输和贮存。本标准适用于输送介质温度（长期运行温度)不高于120 ℃，偶然峰值温度不高于140 ℃的硬质聚氨酯喷涂聚乙烯缠绕预制直埋保温管的制造与检验。
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