Properties

Propane

Butane

Natural

Formula

C3H8

C4H10

CH4

Boiling Point

-44°F

31°F

-263°F

Sp. Gr. Of Gas

1.53

2.00

0.60

Sp. Gr. Of Liquid

0.51

0.58

-N/A-

LB/Gal. of Liquid

4.24

4.81

-N/A-

BTU / Gal.

91,690

102,032

-N/A-

BTU / LB

21,591

21,221

-N/A-

BTU / FT3

2,516

3,280

1,035

FT3 / Gal.

36.39

31.26

-N/A-

FT3 / LB

8.547

6.510

-N/A-

Lat heat of Vap-BTU / Gal

785.0

808.0

-N/A-

Comb. Data / Air:Gas

23.8

31.0

9.5

Flash Point

-156°F

-76°F

-N/A-

Ignition Temp

896°F

788°F

1076°F

Max Flame Temp - Air

3595°F

3615°F

3554°F

Max Flame Temp - O2

5108°F

5200°F

5090°F

Low Limit of Comb.

2.1%

1.8%

5.0%

High Limit of Comb.

10.1%

8.4%

15.0%