DIN EN 253 (2015-12)现行
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 (includes Amendment A2:2015)
出版：German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频
NS EN 253:2009 - Identical
NEN EN 253:2009 - Identical
UNI EN 253:2016 - Identical
SS EN 253:2009 - Identical
NBN EN 253:2009 - Identical
SN EN 253:2009 - Identical
ONORM EN 253:2015 - Identical
EN 253:2009 - Identical
NF EN 253:2009 - Identical
UNE EN 253:2010 - Identical
