|
Commercial Butane |
Commercial Butane |
| Relative density of liquid at 15 ƒC |
0,57 to 0,58 |
0,50 to 0,51 |
| Imperial gallons/ton at 15 ƒC |
385 to 393 |
439 to 448 |
| Litre/tonne at 15 ƒC |
1 723 to 1 760 |
1 965 to 2 019 |
| Relative density of gas compared with air at 15 ƒC and 1 013,25 mbar |
1,90 to 2,10 |
1,40 to 1,55 |
| Volume of gas (litres) per kg of liquid at 15 ƒC and 1 013,25 mbar |
406 to 431 |
537 to 543 |
| Volume of gas (ft3) per lb of liquid at 60 ƒF and 30 in Hg |
6,5 to 6,9 |
8,5 to 8,7 |
| Boiling point at atmospheric pressure ƒC approx. |
-2 |
-45 |
Vapour pressure for products at their maximum specified vapour pressure (gauge):
| Temp. ƒC |
Bar |
Bar |
| -40 |
– |
0,5 |
| -18 |
* |
2,3 |
| 0 |
0,9 |
4,5 |
| 15 |
1,93 |
6,9 |
| 38 |
4,83 |
14,5 |
| 45 |
5,86 |
17,6 |
|
|
| Latent heat of vaporisation (kJ/kg) at 15 ƒC |
372,2 |
358,2 |
| Latent heat of vaporisation (Btu/lb) at 60 ƒF |
160 |
154 |
| Specific heat of liquid at 15 ƒC (kJ/kg ƒC) |
2,386 |
2,512 |
| Sulphur content per cent weight |
Negligible to 0,02 |
Negligible to 0,02 |
| Limits of flammability (percentage by volume of gas in a gas-air mixture to form a combustible mixture) |
Upper 9,0
Lower 1,8 |
Upper 10,0
Lower 2,2 |
Calorific Values:
| Gross: |
| (MJ/m3) dry |
121,8 |
93,1 |
| (Btu/ft3) dry |
3 270 |
2 500 |
| (MJ/kg) |
49,3 |
50,0 |
| (Btu/lb) |
21 200 |
21 500 |
| Nett: |
| (MJ/m3) dry |
112,9 |
86,1 |
| (Btu/ft3) dry |
3 030 |
2 310 |
| (MJ/kg) |
45,8 |
46,3 |
| (Btu/lb) |
19 700 |
19 900 |
|
|
| Air required for combustion (m3 to burn 1 m3 of gas) |
30 |
24 |
|
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