Gene Heskett wrote:
Our std night shift procedure was to pump the big tank down to under
2 or 3
psi, which put the bottles up around 7400 to 7800 psi at midnight. The
morning shift at 8AM had 5200 psi to play with till the truck got there.
Around a 2500 diff. Where did the rest of it go?
The pressure of a given amount of gas in a given volume is proportional
to its absolute temperature. Pressure reduction from 7400 to 5200 would
correspond to a temperature reduction from e.g. 427 Kelvin (309 F, more
than boiling hot but not glowing) to 300 Kelvin (80 F, luke warm).