Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

This is an AMP page - Open full page! for all features.

Propane Butane Mixures - Evaporation Pressures

Evaporation pressures of propane butane mixtures

Sponsored Links

It is common to distribute a mixture of propane (C3H8) and butane (C4H10) (LPG) for combustion purposes.

Propane is more suited to colder environments since it evaporates at -44oF (-42oC) at atmospheric pressure. Butane evaporates at 33oF (0.6 oC) at atmospheric pressure.

Vapor pressures for mixtures of the two products relative to atmospheric pressure (gauge pressure) are indicated below.

Vapor Pressure (psig)
Load Calculator!
MixturePropane
(C3H8)
(%)
1007050300
Butane
(C4H10)
(%)
0305070100
Temperature
(oF)

Load Calculator!
-44 0 0 0 0 0
-30 6.8 0 0 0 0
-20 11.5 4.7 0 0 0
-10 17.5 9 3.5 0 0
0 24.5 15 7.6 2.3 0
10 34 20.5 12.3 5.9 0
20 42 28 17.8 10.2 0
30 53 36.5 24.5 15.4 0
40 65 46 32.4 21.5 3.1
50 78 56 41 28.5 6.9
60 93 68 50 36.5 11.5
70 110 82 61 45 17
80 128 96 74 54 23
90 150 114 88 66 30
100 177 134 104 79 38
110 204 158 122 93 47
  • 1 psi (lb/in2) = 144 psf (lbf/ft2) = 6894.8 Pa (N/m2) = 6.895x10-3 N/mm2 = 6.895x10-2 bar

Note that the evaporation temperature is not the only parameter that influences on evaporation of the propane butane mixture. Evaporation requires heat and if the heat transferred to the liquid gas is limited - the liquid cools down and the evaporation is  reduced.

  • Larger consumers requires heat exchangers fueled with hot water, electric heater or combustion of the propane butane mix itself to supply the evaporation heat.
  • Smaller consumers requires propane butane mix containers with efficient heat transfer from the surroundings. By example - composite containers provides less heat transfer compared to steel containers and may cause problems at lower surroundings temperatures.  

Propane Butane Mix Vapor Diagram - psig

Propane Butane Mix Vapor Diagram - bar

Butane Vapor Pressure (abs)

Temperature
(oC)

Load Calculator!
Vapor Pressure
(bar abs)

Load Calculator!
-101.5 0.0013
-77.8 0.013
-59.1 0.053
-44.2 0.13
-16.3 0.53
-0.5 1.01
18.8 2.03
50.0 5.07
79.5 10.1
116 20.3
Sponsored Links

Related Topics

Related Documents

Sponsored Links

Share

Search Engineering ToolBox

  • the most efficient way to navigate the Engineering ToolBox!

SketchUp Extension - Online 3D modeling!

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro .Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!

Privacy

We don't collect information from our users. Only emails and answers are saved in our archive. Cookies are only used in the browser to improve user experience.

Some of our calculators and applications let you save application data to your local computer. These applications will - due to browser restrictions - send data between your browser and our server. We don't save this data.

Google use cookies for serving our ads and handling visitor statistics. Please read Google Privacy & Terms for more information about how you can control adserving and the information collected.

AddThis use cookies for handling links to social media. Please read AddThis Privacy for more information.

Topics

Unit Converters

Temperature

oC
oF


Load Calculator!

Length

m
km
in
ft
yards
miles
naut miles


Load Calculator!

Area

m2
km2
in2
ft2
miles2
acres


Load Calculator!

Volume

m3
liters
in3
ft3
us gal


Load Calculator!

Weight

kgf
N
lbf


Load Calculator!

Velocity

m/s
km/h
ft/min
ft/s
mph
knots


Load Calculator!

Pressure

Pa (N/m2)
bar
mm H2O
kg/cm2
psi
inches H2O


Load Calculator!

Flow

m3/s
m3/h
US gpm
cfm


Load Calculator!

9 13

This website use cookies. By continuing to browse you are agreeing to our use of cookies! Learn more