Process Equipment and Plant Design
The necessary wall thickness for a metallic storage vessel is a function of the

Operating pressure and welding/joint efficiency
Diameter of the vessel
Ultimate tensile strength (or yield point) of the material and operating temperature
All of these

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Process Equipment and Plant Design
Pick out the wrong statement pertaining to the design of a basket type evaporator.

Downtake is formed by the annular space between the bundle and the shell
The tube bundle is suspended on bracket
It is used for high viscosity liquor having large rate of scaling
There is no central downtake

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