DIN EN 253/A2-2007 区域供暖管道.直埋式热水供暖网用预隔热粘结管系统.钢制给水管、聚氨脂保温层和聚乙烯外护套的管道组件
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; German version EN 253:2003/A2:2006
This amendment has been prepared by CEN/TC 107 "Prefabricated district heating pipe system" (Secretariat: Denmark).
The responsible German body involved in its preparation was the Normenausschuss Heiz- und Raumluft- technik (HVAC Standards Committee), Technical Committee AA 041-01-12 Werkm??ig ged?mmte Mantelrohrsysteme für Fernw?rme (SpA CEN/TC 107).