本文件规定了工厂制造的直线长度的要求、设计和试验方法 直埋式区域冷却分配系统用隔热管中管组件， 包括DN 15至DN 1200的供水管、硬质聚氨酯泡沫隔热层和 聚乙烯。管道组件还可以包括以下附加元件:测量线， 间隔物和扩散屏障。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This document specifies requirements, design and test methods for straight lengths of factory made thermally insulated pipe-in-pipe assemblies for directly buried district cooling distribution systems, comprising a service pipe from DN 15 to DN 1200, rigid polyurethane foam insulation and a casing of polyethylene. The pipe assembly can also include the following additional elements: measuring wires, spacers and diffusion barriers.All current amendments available at time of purchase are included with the purchase of this document.