Can anyone tell me the actual internal volume of a typical 160 CF high pressure cylinder? My argon cylinder is nominally 8" diameter and about 48" tall. Adjusting for the dished bottom and the rounded top and not knowing the thickness my back of the envelope calculation comes about 1.2 CF internal capacity. That would result in about 2000 psia for a full cylinder. I don't recall what it measured when "full" but it was close to that I think.
I have about 300 psia left and was wanting to future out how much gas was left.
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