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Flow Requirements
& Concentration Requirements
Below are the medical gas flow requirements per
NFPA-99 2005
| 50 psig gases: oxygen, nitrous oxide, medical air,
and carbon dioxide |
3.5 SCFM (100 Sl/m) with a pressure drop of not more than 5 psig
and static pressure of 50 - 55 psig
oxygen & medical air outlets serving critical care areas shall
permit a transient flow rate of 6 SCFM (170 Sl/m) for 3 seconds |
| support gases: nitrogen & instrument air |
5.0 SCFM (140 Sl/m) with a pressure drop of not more than 5 psig
and static pressure of 160 - 185 psig |
| medical-surgical vacuum inlets shall draw.... |
3.0 SCFM without reducing the vacuum pressure below 12" HgG at
any adjacent station inlet |
Below are the concentration and contaminant parameters per NFPA-99
2005
| medical air |
19.5 - 23.5% oxygen
pressure dew point: 4°C (39°F)
carbon monoxide: 10 ppm
carbon dioxide: 500 ppm
gaseous hydrocarbons: 25 ppm (as methane)
halogenated hydrocarbons: 2 ppm |
| oxygen |
> or = to 97% |
| nitrous oxide |
> or = to 99% nitrous oxide |
| nitrogen |
> or = to 99% nitrogen or < or = to 1% oxygen |
| other gases |
concentration as specified by + or - 1% unless otherwise
specified |
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© 2006, Medical Gas Info. All Rights Reserved |
