PN 903-8797, Rev A
Propane Vapor Pressure
Vapor pressure data for propane from three sources
1,2,3
are tabulated in Figures
6-1 and 6-2. The data in these gures are illustrated for comparison with the
vapor pressures calculated from the equations listed under References 2 and 3
(in Figures 6-1 and 6-2). At a given temperature, the average of the results ob-
tained from the two equations is taken as the vapor pressure for propane. For
completeness, the two equations are reproduced here.
From Reference 2, the Pv is the vapor pressure of propane (mm Hg) and t is the
temperature (°C).
From Reference 3,
where Pv is the vapor pressure propane (mm Hg) and T is the absolute tem-
perature (K). Equation 2 was based upon 105 data points in the range -128.9 to
96.8 °C and tted the data with an average deviation of 0.46 percent.
log
10
P
v
= 6.82973 –
813.2
248 + t
log
10
P
v
= 36.007 – – 11.666 log
10
T + 0.0085187T
1737.2
T
6-4 | 241CE II Hydrocarbon Dewpoint Analyzer
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