DIN EN 253 (2009-07)被替代
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 and English version EN 253:2009
出版：German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频
NEN EN 253:2009 - Identical
ONORM EN 253:2009 - Identical
ONORM EN 253:2013 - Identical
NBN EN 253:2009 - Identical
EN 253:2009 - Identical
NF EN 253:2009 - Identical
UNE EN 253:2010 - Identical
UNI EN 253:2009 - Identical
UNI EN 253:2013 - Identical
