When I designed vessels many, many years ago, the book "Process Equipment Design" by Brownell and Young was the "bible" for skirt design. It has formulas for the skirt, the base ring, the bolting chairs etc etc. Computers in those days filled whole rooms, cost a fortune to run, and the...
If you only have access to the carbon steel side, you have to weld the cladding first, with suitable stainless steel. However, since you cannot weld using carbon steel electrodes on stainless, the whole weld would have to be with stainless steel.
Clad plate was also hard to get in small...