Capacity of O2 gas in a cylinder

[jor1492]

Hello,

I want to know how can I calculate the volume capacity of O2 gas in a cylinder when the gas is in 2524 psi with a room temperatura (70°F).


thanks in advance

 

[BigInch]

Family history.
... And you thought we wern't related.

 

[MortenA]

@little inch, most gas pipelines in the Danish sector of the north sea has a design pressure of 138 barg (and its stated in barg) - try to covert that to psig

Best regards, Morten

 

[BigInch]

138 barg = +/- 2000 psig
Why do we want to know?

276 barg = +/- 4000 psig

 

[LittleInch]

To get back to the original point - the cylinder pressure is clearly a nominal barg number ( I get 174, ) which may actually be 175??, a bit odd as most seem to be 250 barg.

So pretending to have a pressure accurate to 1psi is a non starter to begin with.

Charts like this already tell you how much you get out of a cylinder....

https://www.praxairdirect.com/Indus...tion-Center/Safety/Cryogenic-Tank-Safety.html

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[MortenA]

it was the talk about round numbers in one unit system being converted into another unit where its not round and then kept with decimals (almost). If the first designer had not been heavily influenced by ASME (i think it must be) then most likely they would have chosen say 150 barg i would think (but then again im not a pipeline designer)

 

[BigInch]

Not sure in this case, because the topic is gas in a "cylinder", which I took to mean a bottle-type cylinder. Those often have maximum pressures (in psig) of 2500, 4000 and 5000 psig which don't correspond to piping class pressures, only the material that the cylinders are made from, aluminum in some cases.

 

[zeusfaber]

And sometimes it looks like it's the test pressure rather than the working pressure that ends up being a nice round number - which must be why the divers always seem to want to fill their bottles to 232 bar.

A.

 

[BigInch]

Right, that's 3500 psi, I used to fill N2 cylinders to 3500, or the HP cylinders to 5000 psig.