Hydrocarbons

Does PRESSURE in a propane tank without propane have any weight?

123

2012-08-10 15:15:13

Very little. When using propane the liquid is constantly being converted to the vapor that is used. When the liquid that weighs \$.24 pounds per gallon is gone the vapor will last only a short time.

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Related Questions

What is the pressure on a 30 pound propane tank

The weight is usually a referance to the volume of liquid propane the tank is designed to hold, not the weight of the tank.

No, and that's exactly the reason for making it larger ... in order to be able to carry more propane around at the same pressure as the small tank, or maybe even somewhat less pressure.

The pressure of the propane bottle will expand when it gets very hot. This will cause the tank to rigid tank to either leak or combust.

the propane tank will expand because of the heat because pressure increases on hotter days

AnswerThe regulator forces the gas from the propane tank to maintain a constant discharge pressure-regardless of the level of propane in the tankA regulator does not force gas from a tank. It merely regulates the amount of pressure from the tank.

Smaller propane tanks such as a 40# tank refer to the amount of propane it will hold. A 20# tank holds 20#'s a 40# tank hold 40#'s ect. The empty weight of the tank is located on the collar and is marked as T.W (tare weight). You can add 40 to that number and that is the tanks full weight. If you need to know how much propane is in the tank take the total current weight of the tank subtract the empty weight (T.W) from that and divided that number by 4.125 which is the weight per gallon of propane.

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.

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.

Propane vapor inside the tank is temperature dependent. It is at 0psi at -40degF as this is the boiling point of propane to about 200psi at 120degF.Propane is at about 100psi at the room temperature.

The tank will weigh about 900 pounds and if full, the 400 gallons of propane will weight about 1680 pounds. 2580 total. Tanks are only filled to about 80% with liquid propane, the other 20% will be filled with propane gas.

the average "grill tank" holds twenty pounds of propane. if you look at the collar of the cylinder it will have a mark TW: 17.1 or something close to this. This stands for tare weight, or weight of the tank empty, which is usually around 17 to 18 lbs. Add 17 to 20 and your tank will weigh close to 37 pounds full (PS- because propane operates off pressure, there is always a pound or two of unused in the tank so your tank will be essentially empty at around 19 to 20 pounds)

260 pounds for the tank plus about 400 pounds of propane. 660 pounds total.

That really depends on the amount of propane, the size of the container, the temperature. remember, Pressure*volume=Moles*R*Temperature.

Propane weighs about 4.2 pounds per gallon. Sounds like you have a 10 gallon tank (less the weight of the empty tank).

Read the TARE weight stamped on the tank. TARE is the empty weight.

Keep in mind that propane is a gas a room temperature only if the pressure is low - for instance, normal atmospheric pressure. Propane in a pressurized tank (such as a barbeque tank, or a fork lift truck fuel tank) is usually liquid even though it is at room temperature, and is then referred to as LPG or Liquified Propane Gas. It becomes a gas instantly upon being released from the tank or cylinder.

20# tanks holds up to 20 #s of propane. The tank weight itself is designated as TW on the tank collar (usually 17-19 lbs)

It's the sound of the lines filling with propane, not the propane tank.

A 20 pound tank will hold 4.7 gallons of liquid propane; the total weight of the tank PLUS LP should be ~37 lbs. (on the collar of the tank there will be a stamp 'TW' for 'tare weight'. This is the weight of the empty tank, so total weight is this number plus 20). Many places fill only to 75% or 80%, so pay attention if they charge "per tank" pricing that it is in line with their fill policy. If they are charging based on 100% and are filling to 80%, you're being ripped off.

Propane tanks are required to have a safety relief valve. The relief valve is a safety device on the propane tank to vent excess pressure.

Propane is a highly flammable gas. If it is mixed with air it will burn extremely quickly, causing an explosion. Since propane is commonly stored under pressure in liquid form, propane cal also produce a BLEVE (boiling liquidexpanding vapor explosion) in which a tank is heated and liquid propane boils, increasing pressure inside. Eventually the tank explodes and the released propane ignites, producing a fireball.

The condensation line on the outside of a propane tank will show the level of fuel. The relative weight can also determine if it is time for a refill. A tank which is rusted or has valve damage should not be refilled.

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