TECHNICAL TYPICAL PROPERTIES

OF COMMERCIAL LPG GRADES

Commercial Propane

Commercial Butane

Gas: Air ratio for combustion

1:24

1:30

Flame temperature in air max. *C

1930

1900

Flame Speed cm/sec

44

44

Relative Density of liquid at 15.6*C (Water at 0*C = 1.0)

0.51

0.58

Litre/tonne at 15.6*C

1975

1742

Relative Density of gas at 15.6*C (Air at 15.6*C = 1.0)

1.52

2.01

Volumes of gas (litres) per kg of liquid at 15.6*C

537

411

Ratio gas: liquid volume at 15.6*C

279

238

Boiling Point at 1 atm. *C

-45

-2

Vapour Pressure-typical bar g at 0*C / 15.6*C

3.8 / 6.4

0.5 / 1.6

Limits of flammability (percentage of gas by vol. In gas-air mixture) Upper / Lower

10 / 2

9 / 1.8