Beleive it or not, The best reference book I'v found for vessels on legs, is:
Pressure Vessel Handbook, by Eugene F. Megyesy.
This can be purchased thru "Pressure Vessel Publishing, inc." P. O. Box 35365, Tulsa, OK 74153.
The Books coverage of this issue is Excellent !
Hope this helps,
jodyed
Right you are snTMan, When I order torispherical heads, I specify "ASME" if that's what I want.
Also, watch out for "Minimum Thickness after Forming" issues. These can bit you if you don't conceder it.
Hope this helps,
jodyed
In reference to your using a software program to calculate your designs, I to us one because it is so much faster. In it, If I enter any externial value other than "0" my software automatically computes externials. The real relivence, in most cases, to externials seem to come when calculating...
I have calculated f&d's and 2:1 ellip's heads. Generally the elliptical heads will hold more pressure than the f&d, however, other factors also come into play, i.e., Is the tanks orientation vertcle or horzontial ? Does the horozontial unit have a clean-out or manway in it ? These things will...
I have had designs where I need externials and to compute I changed Head designs and/or configurations to maintain shell thickness. The expense for Heads was less than the shell segments.
Hope this might help in your future.
jodyed
