本文件规定了工厂热加工的直线长度的要求和试验方法 直埋热水管网用绝缘粘结双管组件，符合 EN 13941-1，包括两根钢制供水管、硬质聚氨酯泡沫隔热层和一个套管 聚乙烯。 管道组件还可以包括以下附加元件:测量线、垫片和垫片 扩散障碍。交叉引用:EN 253EN 17248EN 13941-1EN 14419EN ISO 3126EN 488EN 15698-2EN ISO 9001EN 15632（所有部分）EN 448EN 489-1EN 13941-2购买本文件时可用的所有现行修订版均包含在购买本文件中。

This document specifies requirements and test methods for straight lengths of factory made thermally insulated bonded twin pipe assemblies for directly buried hot water networks in accordance with EN 13941-1, comprising two steel service pipes, rigid polyurethane foam thermal insulation and one casing of polyethylene. The pipe assembly can also include the following additional elements: measuring wires, spacers and diffusion barriers.Cross References:EN 253EN 17248EN 13941-1EN 14419EN ISO 3126EN 488EN 15698-2EN ISO 9001EN 15632 (all parts)EN 448EN 489-1EN 13941-2All current amendments available at time of purchase are included with the purchase of this document.