Originally Posted by
zoama585
Any pressure great enough to escape the bottle would purge the line. The line would contain a higher volume with increased pressure but that would remain behind a quick coupling and not come into play.
As the bottle empties, the line and bottle pressure would eventually equal atmosphere together.
What formula are you using to calculate the volume ?
With good couplings you would not lose much, but if you opened the line or lost the line pressure due to leaks, that is what it would take to refill the line to pressure. Some shops lend themselves to plumbed lines, others to bottles on each cart. I prefer keeping a few different sized bottles around. Portability and backup for when I forget to get something filled. 
I was so busy trying to copy the math symbols into that post, (total fail) I misplaced a decimal. You caught me before my edit.
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