Historical
DIN EN 253/A2:2007
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 (Foreign Standard)
This document contains amendments to EN 253:2003 concerning the technical delivery conditions of steel service pipes.
Deutsches Institut für Normung [din]