UNI EN 448:2009被替代
District Heating Pipes - Preinsulated Bonded Pipe Systems For Directly Buried Hot Water Networks - Fitting Assemblies Of Steel Service Pipes, Polyurethane Thermal Insulation And Outer Casing Of Polyethylene
出版：Italian Standards
专家解读视频
Ascertains requirements and test methods for fittings of prefabricated thermally insulated pipe-in-pipe assemblies comprising a steel service fitting from DN 20 to DN 1200, rigid polyurethane foam insulation and an outer casing of polyethylene for use in directly buried hot water networks with preinsulated pipe assemblies in accordance with EN 253
SN EN 448:2003 - Identical
BS EN 448:2009 - Identical
I.S. EN 448:2009 - Identical
ONORM EN 448:2009 - Identical
NF EN 448:2009 - Identical
NS EN 448:2009 - Identical
SS EN 448 Ed. 3 (2009) - Identical
SN EN 448:2009 - Identical
DIN EN 448 (2009-07) - Identical
NBN EN 448:2009 - Identical
UNE EN 448:2010 - Identical
NEN EN 448:2009 - Identical
UNE EN 448:2005 - Identical
NBN EN 448:2003 - Identical
NBN EN 448:2015 - Identical
BS EN 448:2015 - Identical
EN 448:2015 - Identical
SN EN 448:2016 - Identical
BS EN 448 : 2015 - Identical
NF EN 448:2015 - Identical
NS EN 448:2015 - Identical
NEN EN 448:2015 - Identical
SS EN 448 Ed. 4 (2015) - Identical
ONORM EN 448:2016 - Identical
