Even if the barrel was to hold I cant imagine the motor of the compresor will last too long having to work in a load 100 times larger than the original.[/quote
Nandy, that same compressor could fill the Hindenberg to 100psi and not experience any more "load" than the one gallon tank it is filling now. The only difference would be the length of time the compressor would operate at the same load until the volumetric difference was made up. Fluid power is very deceptive. Ten psi is dangerous. Ten psi in a six inch cylinder will lift your 275lb mother-in-law easily. Pressure vessels are seamless and rated at appx 75% of their calculated allowable stress. "Hoop stress" in a pressure vessel is (press x rad / thick). If a vessel was seamless and had full spherical ends, a 30" dia barrel that was .06 thk made of steel with a tensile yield strength of 30,000 psi would be rated as follows:
Rated psi = thk x (allow. stress) / largest radius
PSI= .06 x (75% of 30ksi) / 15
Rated PSI = 90
a 55 gallon barrel that is flat ended, sealed by coining and not welded, and chock full of discontinuities would not be rated, but as stated many times, fun to watch go boom from a safe distance!
Spent many years designing pressurized aerospace heat exchangers and the engineer nerd in me is overpowering and escapes often.
