tank volume question

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RedSea

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Do AL 80 aluminum tank (3000 psi) and HP 80 steel tank (3500 psi) have the same internal volume?
 
nope. The HP tank is physically smaller internally.

Joe
 
Think about it. If 2 tanks have the same air content but the pressure is greater in one the the other must have a greater internal volume.
80cf/ 3500psi * 14.5 psi (atmospheric air pressure) =0.33 CF
80cf/ 3000psi * 14.5 psi=0.386
So the steel will be smaller on the inside and because its stonger and the walls can be thinner it will also be smaller on the outside.
 
An aluminum "80" holds 77.4 cubic feet of gas when filled to its rated volume at standard temperature.

A HP 80 holds 80 cubic feet when filled to its rated volume at standard temperature.

the K
 
https://www.shearwater.com/products/teric/

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