NS EN ISO 4126-4 Ed. 1 (2004)被替代
Safety Devices For Protection Against Excessive Pressure - Part 4: Pilot Operated Safety Valves
出版：Norwegian Standards (Norges Standardiseringsforbund)
专家解读视频
Specifies requirements for pilot operated safety valves, other than those covered in Part 1, irrespective of the fluid for which they are designed.
ONORM EN ISO 4126-4:2004 - Identical
ISO 4126-4:2004 - Identical
NEN EN ISO 4126-4:2004 - Identical
SS EN ISO 4126-4 Ed. 1 (2004) - Identical
UNE EN ISO 4126-4:2004 - Identical
UNI EN ISO 4126-4:2006 - Identical
I.S. EN ISO 4126-4:2004 - Identical
NF EN ISO 4126-4:2004 - Identical
NBN EN ISO 4126-4:2004 - Identical
DIN EN ISO 4126-4 (2004-05) - Identical
BS EN ISO 4126-4:2004 - Identical
SN EN ISO 4126-4:2004 - Identical
NBN EN ISO 4126-4:2013 - Identical
SS EN ISO 4126-4 Ed. 2 (2013) - Identical
NF EN ISO 4126-4:2013 - Identical
NEN EN ISO 4126-4:2013 - Identical
