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If there is propane in the tank there will be pressue. It can't lose its pressure. If one has a propane tank that has "lost its pressure" even though there is propane in the tank, there is almost certainly a problem with the valve (assuming the individual attempting to use the tank knows how). There is an overfill valve inside the tank. It is a component entirely separate from the external valve that a user controls. Let a propane company sort it out. They're the experts, and they want you to come in so they can help. They live for stuff like this because they are professionals.

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16y ago
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13y ago

All tanks lose pressure over time.

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Q: Is there any way to pressurize a propane tank that is still full of propane but has lost its pressure?
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How much pressure in a 30 lb propane tank?

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.


Is propane gas liquid or gas?

Propane is a gas a room temperature if it is not compressed. However, if it put in a canister under high enough pressure, it will be a liquid even at room temperature. Propane is a liquid below -44 degrees F or if its compressed. Grill bottles are only fillid 80% full with liquid. so you can use the propane gas on the top of the bottle.


Does cold affect propane?

Yes and no. Propane is very nonreactive by itself (except when burned in oxygen). The temperature that propane is at doesn't effect it's properties. Also, propane has a very low freezing point (-188°C) so it won't freeze when it gets cold. However, when using propane for a stove, etc., cold can affect how well it works. A propane tank is full of liquid propane under pressure. When it is being used, the liquid first has to vaporize to a gas, where it can then be burned. Because it takes a lot of heat for the liquid to vaporize into a gas, cold weather can slow down the flow. If this is a problem, the propane tank can be placed in a bucket of lukewarm water so that heat is available for the propane to vaporize.


How many pounds of propane are in a 100 pound bottle?

"A standard 100 lb propane bottle contains 90 litres of propane. " http://www.uniongas.com/business/otherci/techsol/heating/constructionheat/conHeatCostComp.asp


How many gallons of propane can be put in a 500 gallon tank?

As a rule, your propane tank will hold 80% of its designated capacity, therefore, a 500 gallon tank would hold 400 gallons. However, the 80% rule is based on expansion and contraction due to temperature. Propane expands in warmer weather. In cold temperatures you can fill to over 90% capacity (450+ gallons) but you should plan on using a portion of that propane before the weather turns warm or pressure could build as temperatures rise, thereby opening the pressure relief valve and releasing gaseous gold into the atmosphere! The hazard could be worse than the expense. Note: Some tanks are rated in pounds vs gallons. A 100 pound tank would hold just under 25 gallons.

Related questions

How much pressure in a 30 lb propane tank?

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.


Is propane gas liquid or gas?

Propane is a gas a room temperature if it is not compressed. However, if it put in a canister under high enough pressure, it will be a liquid even at room temperature. Propane is a liquid below -44 degrees F or if its compressed. Grill bottles are only fillid 80% full with liquid. so you can use the propane gas on the top of the bottle.


What is the psi on a 20 lb propane tank?

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 )


Does cold affect propane?

Yes and no. Propane is very nonreactive by itself (except when burned in oxygen). The temperature that propane is at doesn't effect it's properties. Also, propane has a very low freezing point (-188°C) so it won't freeze when it gets cold. However, when using propane for a stove, etc., cold can affect how well it works. A propane tank is full of liquid propane under pressure. When it is being used, the liquid first has to vaporize to a gas, where it can then be burned. Because it takes a lot of heat for the liquid to vaporize into a gas, cold weather can slow down the flow. If this is a problem, the propane tank can be placed in a bucket of lukewarm water so that heat is available for the propane to vaporize.


What is the full weight of a 30 pound propane tank?

. . . . 30 pounds


How much does a full propane grill tank weigh?

About 30 pounds.


How long will 30000 btu heater run on a 23 gallon tank?

The MH80CV, part of the Mr. Heater Contractor Series, is a 30,000-80,000 BTU Propane Convection heater. The MH80CV provides reliable heat for areas up to 1900 sq. feet. It will operate for up to 14 hours on a 20-lb propane tank. The MH80CV features a standing pilot, piezo push-button ignition, and 'insta-lock' chamber for easy assembly. The MH80CV comes ready to use with the included hose and regulator. It operates on a 20-lb or larger propane tank (not included).There are a couple of other factors that may effect the time a 20 pound cylinder will last on a heater. Propane is stored in liquid form in the tank and must evaporate to be used in most heaters. The colder the temperature the propane tank is stored at the lower the pressure is in the tank. As the liquid propane evaporates it cools down the liquid propane still in the tank. As a result at minus -20 you might have a half full twenty pound tank and not have enough pressure to run the heater.


How many pounds of propane are in a 100 pound bottle?

"A standard 100 lb propane bottle contains 90 litres of propane. " http://www.uniongas.com/business/otherci/techsol/heating/constructionheat/conHeatCostComp.asp


Can you connect a full-size propane tank to a portable gas grill?

For a short amount of time yes.


How much does a 40 pound propane tank weigh?

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/


Why does your oil pressure gauge read red when oil is full in road master?

If you already change the unit and it still the same then it can be the oil pump.


How many gallons of propane can be put in a 500 gallon tank?

As a rule, your propane tank will hold 80% of its designated capacity, therefore, a 500 gallon tank would hold 400 gallons. However, the 80% rule is based on expansion and contraction due to temperature. Propane expands in warmer weather. In cold temperatures you can fill to over 90% capacity (450+ gallons) but you should plan on using a portion of that propane before the weather turns warm or pressure could build as temperatures rise, thereby opening the pressure relief valve and releasing gaseous gold into the atmosphere! The hazard could be worse than the expense. Note: Some tanks are rated in pounds vs gallons. A 100 pound tank would hold just under 25 gallons.