BS EN 253-2009 区域供暖管道——直埋热水管道网络预保温粘合管道系统——供水钢管、聚氨酯保温层以及聚乙烯套管组成的管道装配(中文版)
英文名称
District heating pipes — Preinsulated bonded pipe systems for directly buried hot water networks — Pipe assembly of steel service pipe, polyurethane thermal insulation and outer casing of polyethylene