A Design Method for Wall Thickness of External Pressure Vessels Based on Reasonable Approximation and Equation Solving
The current textbook"Fundamentals of Chemical Equipment and Machinery"includes two methods for designing external pressure vessels:"analytical method"and"graphical algorithm",but both methods require the assumption of the nominal wall thickness of the cylinder in advance δn.Substitute the formula or use a graph to complete the subsequent design until the allowable external pressure[p]is not less than the design external pressure pc and is as close as possible.The initial guess of nominal wall thickness is difficult to meet the requirements at once,and there are problems of surplus and deficiency,especially for inexperienced beginners who need to constantly try and repeat tedious operations to complete the design.This article directly obtains the effective wall thickness using a reasonable approximation and solution equation method δe.And then seek the name meaning wall thickness δn.It can greatly simplify the design and calculation of external pressure vessels.
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