I'm looking at a 1952 drawing of a CS, 100 psig, vertical, 10'-6" dia. x 18'-10" tall pressure vessel with 2:1 elliptical heads. General note says "125 psi hydrostatic, at which hammer all welds and conn. with a 6 lb. hammer, then 150 psi." Why? Just curious.
To a ChE, the glass is always full - 1/2 air and 1/2 water.
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