本欧洲标准规定了用于直埋式热水网络的直线长度预制绝热管内管组件的要求和测试方法，包括DN 15至DN 1200的钢制服务管，硬质聚氨酯泡沫隔热层和聚乙烯外壳。管组件还可以包括以下附加元件:测量电线，间隔物和扩散屏障。 本标准仅适用于绝缘管道组件，用于连续操作温度高达120°C的热水，偶尔峰值温度高达140°C。 附件B概述了在各种温度下连续运行的预期热寿命的估计

This European Standard specifies requirements and test methods for straight lengths of prefabricated thermally insulated pipe-in-pipe assemblies for directly buried hot water networks, comprising a steel service pipe from DN 15 to DN 1200, rigid polyurethane foam insulation and an outer casing of polyethylene. The pipe assembly may also include the following additional elements: measuring wires, spacers and diffusion barriers. This standard applies only to insulated pipe assemblies, for continuous operation with hot water at various temperatures up to 120 °C and occasionally with a peak temperature up to 140 °C. The estimation of expected thermal life with continuous operation at various temperatures is outlined in Annex B.