You cannot use output pressure to tell how full a tank is. The pressure will remain constant until it's just about out of propane. You can use weight, if you know how much it weighs when empty, and when full - then it's just simple math.
The propane tank holds 30 liters.
One gallon of propane weighs 5 pounds. The tank would hold 60 gallons.
The cost of a 20 lb tank of propane can vary depending on your location and current market prices. On average, you can expect to pay between $15 to $30 to refill a 20 lb tank of propane. It's best to check with local suppliers for current pricing.
Assuming each use consumes 1 lb of propane (30 minutes on a 3 burner grill), a 20 lb propane tank would provide approximately 20 uses (20 lbs ÷ 1 lb/use). This calculation may vary based on factors such as grill efficiency and outdoor temperature.
This is a list of some of the available smaller size propane tanks: * 20# = 4 gallon * 30# = 7 gallon * 40# = 10 gallon * 60# = 15 gallon * 100# = 25 gallon ...and then there are the larger home tanks ranging from 250, 200, 750 and 1,000 gallons.
About 30 pounds.
The propane tank holds 30 liters.
To find out how many gallons are left in the tank at 30%, you can multiply the tank's total capacity by 0.30 (which represents 30%). For a 250 gallon tank, this would be 250 * 0.30 = 75 gallons left at 30%.
. . . . 30 pounds
One gallon of propane weighs 5 pounds. The tank would hold 60 gallons.
30. You just said it's a 30 gallon tank.
a typical steel "30 pound" liquid propane tank weighs about 25-28 pounds empty.propane tank markings (on collar)propane weighs about 4.125 pounds per gallon and a "30 pound tank" willhold about 7.5 gallons so a full tank will weigh about 55 pounds or so./source: wiki.answers.com/
The lower heating value of propane is about 45 megajoules per kilogram (MJ/kg). A "20 pound" portable propane tank holds about 18 pounds, or about 8 kg of propane, so the the heating value is somewhere around 360 MJ. A megawatt-hour is one megawatt for an hour, or 3600 megawatt-seconds, which is the same as saying 3600 MJ. So a tank of propane has a raw energy equivalent of about 0.1 MW-hr, or 100 kW-hr. If you're talking about turning it into electricity, that's a different matter. Internal combustion engines typically have a thermodynamic efficiency of around 30%, so you can't get more than about 30 kW-hr out of that much fuel.
The pressure inside a propane tank depends on the ambient temperature of the tank and if Liquid Propane Gas (LPG) is present inside the tank. It has nothing to do with the size of the tank. A 20 lb tank that is not more than 80% full, in an 100 degree F environment, with LPG in it, will have approximately 172 PSIG, just as a 200 lb that is not more than 80% full, in an 100 degree F environment, with LPG in it, will have approximately 172 PSIG. Examples are: A tank with LPG (no more than 80% full) at 80 degree F with have 128 PSIG, 60 degree F with have 92 PSIG, 30 degree F with have 51 PSIG, and -20 degree F with have 11 PSIG. This explains the decrease in pressure as you use a large amount of propane from a tank quickly. The tank cools due to the venture effect which drops the temperature of the LPG. The drop in temperature results in a drop in pressure. When the tank warms up, as long as Liquid Propane Gas is still present the pressure will go up. (For a more detailed chart go to http:/www.propanecarbs.com/propane.html )
The water pressure depends on the residual air pressure in the tank. Normally it should be between 30 -50-psi. Tank air pressure is important, it should be about 27-29 when water is nearly empty.
The letters "TW" on a propane tank stand for "Tested Water," indicating that the tank has been tested for water capacity. "DT" refers to "Design Type," which is part of the tank's specification related to its design and construction. These markings help ensure the tank meets safety regulations and standards for storage and transportation of propane.
a typical steel "30 pound" liquid propane tank weighs about 25-28 pounds empty. propane tank markings (on collar) propane weighs about 4.125 pounds per gallon and a "30 pound tank" will hold about 7.5 gallons so a full tank will weigh about 55 pounds or so. Typical recertification stamp: MM XXX YY E MM -> 2 digit recertification month XXX ->3 character Re-qualifier's registration number YY -> 2 digit recertification year E ->States the cylinder has been externally examined WC -> Water capacity of the cylinder. TW -> Tare weight of the cylinder (what the tank weighs empty) ICC, DOT, BTE, CTC or TC -> Specification number eg. TC4BA240 10 89 -> Date of manufacture (October. 1989)