Propane Question: 18 Gal = XX Pounds?

to the OP..yes close
you ask abut weight NOT volume or use time

so i think you are trying to calculate cargo capacity
figure out loaded 'wet' weight, then figure out cargo limits

What difference? If it's full you have enough for quite a while. If your running the furnace in the winter, park close to the gas supply.

wolfe10 wrote:
Figure 60 lbs-- one does NOT fill a propane tank 100% full.

Yes you fill them to 100% of rated capacity.
Of course rated capacity is 80% of total volume.

Second Chance wrote:
Google is your friend. Propane (LP) is 4.2 lbs./gallon, so 18 gallons would be 75.6 lbs.

Rob

18 gallons is the tank capacity including the headspace and so it needs to be adjusted down by 20% to get the permissible capacity in pounds of propane (as there must be some allowance for headspace). Your tank (nominally) holds 60 pounds of propane. The actual amount that gets put in might vary slightly based on the ambient temperature, how level you are when it's being filled, and other such variables.

A DOT cylinder, such as the 20 pound cylinders used for grills and so forth, is sized in the nominal working capacity in pounds of propane and so already has the headspace accounted for. A 20 pound cylinder has an internal volume of about six gallons in total, and holds (nominally) 20 pounds of propane when filled.

Figure 60 lbs-- one does NOT fill a propane tank 100% full.

Google is your friend. Propane (LP) is 4.2 lbs./gallon, so 18 gallons would be 75.6 lbs.

Rob

My 100 pound tank takes 24 gallons when it's empty (filled to 80%), so that sounds about right.

20 pound tanks take about 6.5 gallons.