Process Equipment and Plant Design
Normally, the plate thickness of the bottoms and roofs of vertically cylindrical storage vessels as compared to that of the cylindrical shell is

Less
Same
More or less depending upon the pressure & temperature inside the vessel and the nature of the fluid contained therein
More

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Process Equipment and Plant Design
Vertical condenser is advantageous to the horizontal condenser from operation point of view, when

Only the function of condensation is to be carried out
Sub cooling of condensate is desired
Both the functions of condensation & sub cooling are carried out in a single unit
Hydrostatic head is required for refluxing the condensate

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