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尊龙凯时(中国)人生就是搏!

industrial and medical gas specifications (u.s.)-尊龙凯时平台入口

argon

purity 99.997%
oxygen less than 0.0005%
dew point
liquid argon: –90ºf or lower

helium – gaseous

purity 99.995%
oxygen less than 0.0005%
dew point
–90ºf or lower

helium – liquid

purity not less than 99.999%
oxygen not more than 0.0001%
dew point
–105ºf or lower

hydrogen – gaseous

purity 99.95%
oxygen less than 0.0005%
dew point
gaseous hydrogen: –90ºf or lower

hydrogen – liquid

purity 99.999%
oxygen less than 0.0002%
dew point
liquid hydrogen:  –105ºf or lower

medical helium – gaseous – meets usp

purity not less than 99.0%
oxygen not more than 1.0%
carbon monoxide
not more than 0.001%
odor
none

medical nitrogen – meets nitrogen nf

nitrogen and trace inerts 99.0%
oxygen not more than than 1.0%
carbon monoxide
less than 0.001%
odor
none

medical oxygen – meets oxygen usp

oxygen 99.0%
odor
none

nitrogen

nitrogen and trace inerts 99.998%
oxygen less than 0.001%
dew point
liquid nitrogen: –90ºf or lower

oxygen

purity 99.5%
inerts less than 0.5%
dew point
liquid oxygen: –80ºf or lower
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