FM1520
Contributor
What low pressure tank compares to a full HP 80, or maybe: HP 80 cu ft full = x cu ft at low pressure, what is x. I'm trying to compare my AL 92 at 3000 psi to a HP 80. Thanks.
HP steel tank capacity
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WreckDiver1321
Contributor
Not entirely sure what you're asking here, but I'll take a stab at it.
If my math is right, this should be the answer.
A HP80 holds 81 cu.ft. at 3442 PSI (Worthington HP80). So, take 81 and divide by 3442, that should tell you how many cu.ft. of gas is in the tank per PSI. Which is roughly 0.023532 cu.ft./PSI. So, now we need to convert it to low pressure. So, multiply 0.023532 by 2400 and you get about 56.47 cu.ft. Unless your LP tank has the "+" that indicates a 10% overfill, which means you would fill to 2640. At 2640 PSI you'd have 62.12 cu.ft. of gas in your cylinder. If you want to convert it to standard pressure, which most AL tanks are (there are some LP AL tanks too), then you'd multiply 0.023532 by 3000 and get 70.6 cu.ft. of gas.
So, bottom line:
A HP80 at 3442 psi has 81 cu.ft. of gas
A HP80 at 2400 psi has about 56.47 cu.ft. of gas
A HP80 at 2640 psi has about 62.12 cu.ft. of gas
A HP80 at 3000 psi has about 70.6 cu.ft. of gas
Again, if my math is correct, those should be mostly accurate.
I hope that helps!
If my math is right, this should be the answer.
A HP80 holds 81 cu.ft. at 3442 PSI (Worthington HP80). So, take 81 and divide by 3442, that should tell you how many cu.ft. of gas is in the tank per PSI. Which is roughly 0.023532 cu.ft./PSI. So, now we need to convert it to low pressure. So, multiply 0.023532 by 2400 and you get about 56.47 cu.ft. Unless your LP tank has the "+" that indicates a 10% overfill, which means you would fill to 2640. At 2640 PSI you'd have 62.12 cu.ft. of gas in your cylinder. If you want to convert it to standard pressure, which most AL tanks are (there are some LP AL tanks too), then you'd multiply 0.023532 by 3000 and get 70.6 cu.ft. of gas.
So, bottom line:
A HP80 at 3442 psi has 81 cu.ft. of gas
A HP80 at 2400 psi has about 56.47 cu.ft. of gas
A HP80 at 2640 psi has about 62.12 cu.ft. of gas
A HP80 at 3000 psi has about 70.6 cu.ft. of gas
Again, if my math is correct, those should be mostly accurate.
I hope that helps!
decidedlyodd
Contributor
The size of the tank in cubic feet refers to the amount of air in the tank if it were expanded out to 1 ATA (about 14.7 psi). So HP 80 @ 3442 psi holds the same amount of air as an AL 80 @ 3000 psi.
If you fill an HP 80 to 2400 psi,
80 cuft x (2400 / 3442) = 56 cuft
or to 2640 psi (+ marked tanks):
80 cuft x (2640 / 3442) = 61 cuft
Or if you fill the 92 curt tank to 3442 psi,
92 cuft x (3442 / 3000) = 106 cuft
If you fill an HP 80 to 2400 psi,
80 cuft x (2400 / 3442) = 56 cuft
or to 2640 psi (+ marked tanks):
80 cuft x (2640 / 3442) = 61 cuft
Or if you fill the 92 curt tank to 3442 psi,
92 cuft x (3442 / 3000) = 106 cuft
Last edited:
WreckDiver1321
Contributor
Now, if you're looking to overfill a LP tank that is roughly the same capacity as a HP80, then you'd want a LP85.
To get it close to a 92 cu.ft. cylinder:
A LP85 at 2640 is roughly 83 cu.ft. (Worthington LP85) 83 divided by 2640 is about 0.032197. So, 0.032197 multiplied by 3000 is roughly 96.6 cu.ft. of gas.
So, if you overfill a LP85 to 3000 psi, you'd have 96.6 cu.ft. of gas.
To get it close to a 92 cu.ft. cylinder:
A LP85 at 2640 is roughly 83 cu.ft. (Worthington LP85) 83 divided by 2640 is about 0.032197. So, 0.032197 multiplied by 3000 is roughly 96.6 cu.ft. of gas.
So, if you overfill a LP85 to 3000 psi, you'd have 96.6 cu.ft. of gas.
OP
FM1520
Contributor
excellent. Thank you - that was exactly what I was looking for!
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