+40 F.
+30 F.
+20 F.
+10 F.
0 F.
-10 F
-20 F.
-30 F.
150
214,900 187,900 161,800 148,000 134,700 132,400 108,800 107,100
(600)
250
288,100 251,800 216,800 198,400 180,600 177,400 145,800 143,500
(1000)
500
478,800 418,600 360,400 329,700 300,100 294,800 242,300 238,600
(2000)
1000
852,800 745,600 641,900 587,200 534,500 525,400 431,600 425,000
(4000)
MAXIMUM BTU CONTENT
(PROPANE)
The following table shows the maximum BTU's that a cylinder contains.
CYLINDER SIZE
BTU CONTENT
100 pound
2,159,100
250 gallon USA
22,922,500
500 gallon USA
45,845,000
1000 gallon USA
91,690,000
CAUTION:
In extremely cold weather it is impossible to
completely empty a propane cylinder.
PRESSURE & FLOW EQUIVALENTS
1 Std. Atmosphere =
14.73 lb./sq. in. =
1.014 bar
1" Water Column (W.C.) =
0.58 oz./sq. in. =
2.49 millibar
11" Water Column =
0.4 lb./sq. in.=
27.39 millibar
1 lb./sq. in. (psig) =
27.71" W.C. =
0.0689 bar
1" Mercury =
0.49 psig =
33.86 millibar
1 Std. Cubic Ft./Hr. =
2,500 BTU/Hr. =
0.02832 cu. m/hr.
1 BTU/Hr. =
0.2931 Watts
LPG - PROPANE FUEL
VAPORIZATION RATE
The following chart shows the amount of BTU's that various sizes of tanks will
produce on the average at specific temperatures and regular atmospheric
conditions.
Tank Size
Gallons
(Pounds)
Maximum intermittent withdrawal rate (BTU/hr) without tank frosting*
if lowest outdoor temperature (average for 24 hours) reaches
.
* Frosting on the outside of the tank acts as an insulator, reducing the
vaporization rate.