Draft Document - District heating pipes - Bonded single pipe systems for directly buried hot water networks - Factory made pipe assembly of steel service pipe, polyurethane thermal insulation and a casing of polyethylene; German and English version EN 253:2019/prA1:2022
文件草案-区域供暖管道-直埋热水网络的粘结单管系统-工厂制造的钢制供水管、聚氨酯隔热层和聚乙烯套管的管道组件;德语和英语版本EN 253:2019/prA1:2022