Historical
DIN EN 253:2006
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 (Foreign Standard)
This document contains amendments to EN 253:2003 concerning outside diameter and wall thickness of the casing. The changes are based on the latest experience.
Deutsches Institut für Normung [din]