[ARCHIVED THREAD] - How many gallons . . . (Page 1 of 2)
Posted: 2/4/2016 10:35:13 PM EDT
| . . . in a standard propane bottle? |
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This. IF you swap them. Take them to someplace that actually FILLS them, and you get nearly 5 gallons. Quoted:
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A 20-pound grill tank holds about four gallons. This. IF you swap them. Take them to someplace that actually FILLS them, and you get nearly 5 gallons. That's not how volume works. |
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That's not how volume works. Quoted:
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A 20-pound grill tank holds about four gallons. This. IF you swap them. Take them to someplace that actually FILLS them, and you get nearly 5 gallons. That's not how volume works. The tanks you get if you swap them are filled to just under 80% capacity. If you get them FILLED, they are filled to just under 100% capacity. |
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The tanks you get if you swap them are filled to just under 80% capacity. If you get them FILLED, they are filled to just under 100% capacity. Quoted:
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A 20-pound grill tank holds about four gallons. This. IF you swap them. Take them to someplace that actually FILLS them, and you get nearly 5 gallons. That's not how volume works. The tanks you get if you swap them are filled to just under 80% capacity. If you get them FILLED, they are filled to just under 100% capacity. And they still hold the same volume of gas. |
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Sooooooo, how do they measure the weight on an RV belly tank, the fuel tank on my truck, or my 500 gallon outside tank? Yeah, no. Quoted:
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Propane and propane accessories are sold by weight. There's a reason for this  Yeah, no. Pressure would be my guess. The volume of the tank is the same empty as it is filled. |
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And they still hold the same volume of gas. Quoted:
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A 20-pound grill tank holds about four gallons. This. IF you swap them. Take them to someplace that actually FILLS them, and you get nearly 5 gallons. That's not how volume works. The tanks you get if you swap them are filled to just under 80% capacity. If you get them FILLED, they are filled to just under 100% capacity. And they still hold the same volume of gas. The product inside the tank is not in a gaseous state. Posted Via AR15.Com Mobile |
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Quoted: Pressure would be my guess. The volume of the tank is the same empty as it is filled. Quoted: Quoted: Quoted: Quoted: Propane and propane accessories are sold by weight. There's a reason for this Yeah, no. Pressure would be my guess. The volume of the tank is the same empty as it is filled. You fill and vent gas from the bonnet tap or fill valve. You are actually pumping liquid. When the liquid hits the fill line, you get fog from the vent and cut the fill them vent. Measured in gallons, it's pretty consistent despite temperature variance. |
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And they still hold the same volume of gas. Quoted:
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A 20-pound grill tank holds about four gallons. This. IF you swap them. Take them to someplace that actually FILLS them, and you get nearly 5 gallons. That's not how volume works. The tanks you get if you swap them are filled to just under 80% capacity. If you get them FILLED, they are filled to just under 100% capacity. And they still hold the same volume of gas. Propane is liquid when compressed (it has a high vapor pressure, but no so high that a regular steel canister can't easily hold enough pressure to convert it to a liquid). Gaseous propane, like other gasses, have something like 1000 times the volume per mol that liquid propane does. EDIT: Upon some research, it's about 310 times as much. |
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Quoted: The tanks you get if you swap them are filled to just under 80% capacity. If you get them FILLED, they are filled to just under 100% capacity. Quoted: Quoted: Quoted: Quoted: A 20-pound grill tank holds about four gallons. This. IF you swap them. Take them to someplace that actually FILLS them, and you get nearly 5 gallons. That's not how volume works. The tanks you get if you swap them are filled to just under 80% capacity. If you get them FILLED, they are filled to just under 100% capacity. So much fail here. Newer propane tanks cannot be filled beyond approximately 80% of their volume. OPD (overfill prevention device) valves on the tank stop propane from flowing into the tank once they reach ~80% of the volume of the tank. They use a float to operate the shut off. A tank that is filled to 100% of its volume would be a dangerous thing, which is why the OPD valves are required on all (BBQ and RV sized) propane tanks since the late 90's IIRC. Older tanks without them cannot legally be filled. Some forklift tanks, larger 100# tanks, etc, wont have OPD valves but can still be filled. It is true that the tanks in the exchange bins are often not filled to a full 80%... some are, most are not. Having your tank refilled is generally a better deal, as long as it has a current certification stamp on the collar. Not because you'll get a tank that is more full, really, but because the price per gallon is much cheaper than paying for an exchange that may or may not be "full"... A "20#" tank will hold about 4.5 gallons of propane, some a little less, some more, if it's "empty" ...Someone else already mentioned this. Most places I've seen are selling by the gallon now... and not buy weight. I used to fill a lot of tanks at my old job. |
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So much fail here. Newer propane tanks cannot be filled beyond approximately 80% of their volume. OPD (overfill prevention device) valves on the tank stop propane from flowing into the tank once they reach ~80% of the volume of the tank. They use a float to operate the shut off. A tank that is filled to 100% of its volume would be a dangerous thing, which is why the OPD valves are required on all (BBQ and RV sized) propane tanks since the late 90's IIRC. Older tanks without them cannot legally be filled. Some forklift tanks, larger 100# tanks, etc, wont have OPD valves but can still be filled. It is true that the tanks in the exchange bins are often not filled to a full 80%... some are, most are not. Having your tank refilled is generally a better deal, as long as it has a current certification stamp on the collar. Not because you'll get a tank that is more full, really, but because the price per gallon is much cheaper than paying for an exchange that may or may not be "full"... A "20#" tank will hold about 4.5 gallons of propane, some a little less, some more, if it's "empty" ...Someone else already mentioned this. Most places I've seen are selling by the gallon now... and not buy weight. I used to fill a lot of tanks at my old job. Quoted:
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A 20-pound grill tank holds about four gallons. This. IF you swap them. Take them to someplace that actually FILLS them, and you get nearly 5 gallons. That's not how volume works. The tanks you get if you swap them are filled to just under 80% capacity. If you get them FILLED, they are filled to just under 100% capacity. So much fail here. Newer propane tanks cannot be filled beyond approximately 80% of their volume. OPD (overfill prevention device) valves on the tank stop propane from flowing into the tank once they reach ~80% of the volume of the tank. They use a float to operate the shut off. A tank that is filled to 100% of its volume would be a dangerous thing, which is why the OPD valves are required on all (BBQ and RV sized) propane tanks since the late 90's IIRC. Older tanks without them cannot legally be filled. Some forklift tanks, larger 100# tanks, etc, wont have OPD valves but can still be filled. It is true that the tanks in the exchange bins are often not filled to a full 80%... some are, most are not. Having your tank refilled is generally a better deal, as long as it has a current certification stamp on the collar. Not because you'll get a tank that is more full, really, but because the price per gallon is much cheaper than paying for an exchange that may or may not be "full"... A "20#" tank will hold about 4.5 gallons of propane, some a little less, some more, if it's "empty" ...Someone else already mentioned this. Most places I've seen are selling by the gallon now... and not buy weight. I used to fill a lot of tanks at my old job. As long as the tanks are currently certified, they can be filled for welding / cutting. Home use for grilling or heating is not permitted. Other than that you are correct. |
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20lbs are 4 gallon tanks (as previously mentioned). I painted one like a lego man's head and thought it was awesome.
Jokes on me, they wont fill it. You went to the wrong propane shop. All the local shops will refill them regardless of how they are painted, assuming they have the correct valves and aren't damaged. |
correct me if I'm wrong, and I know that you will 
best to get your tank refilled than to go to a blue-rhino (exchange) that are outside various stores (Walmart and Walgreen around here) from what I recall hearing, is that the ones that you exchange are not filled full due to DOT regulations, and you are paying for convenience. |
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pro tip. or amateur tip. you pick.
I have been slowly exchanging my beat to hell crappy 20lb tanks with new ones from the exchange at lowes. this gets me a nice shiny new tank with less than full amount from blue rhino, when I use up the fuel I then just get it refilled it at the uhaul place that fills em up all the way turned 4 crappy kinda rusty beat to hell tanks for new ones that way. |
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. The tanks you get if you swap them are filled to just under 80% capacity. If you get them FILLED, they are filled to just under 100% capacity. Quoted:
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A 20-pound grill tank holds about four gallons. This. IF you swap them. Take them to someplace that actually FILLS them, and you get nearly 5 gallons. That's not how volume works. . The tanks you get if you swap them are filled to just under 80% capacity. If you get them FILLED, they are filled to just under 100% capacity. You be wrong |
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20lbs are 4 gallon tanks (as previously mentioned). I painted one like a lego man's head and thought it was awesome. Jokes on me, they wont fill it.  I've never found it hard to find a place that doesn't much care about little unimportant things like tank color, inspection date, giant rust patches, or even a customer juggling road flares while sitting on the bulk tank during the fill. |
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Pressure would be my guess. The volume of the tank is the same empty as it is filled. Quoted:
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Propane and propane accessories are sold by weight. There's a reason for this Yeah, no. Pressure would be my guess. The volume of the tank is the same empty as it is filled. Ok stop posting. You have no clue how propane works. Propane liquifies at pressure. The tank is filled with liquid propane, and it turns back into a gas at atmospheric pressure. An almost empty tank and a full tank will contain almost the same pressure. The pressure in the tank only changes with temperature. It will not start dropping until the tank is completly empty of liquid and only contains gas. Propane is pumped by the gallon in liquid form. |