A certain pressure vessel manufacturer avoids doing reinforcements calculations for openings by always providing a reinforcing pad extending upto double the diameter of the opening and of the same material and thickness as that of the shell wall. If area compensation is accepted as a code guideline, his approach leads to safe design

A. Only if the opening is on spherical vessel

B. Only if the opening is on a vertical cylinderical vessel

C. Only if the opening is on a horizontal cylinderical vessel

D. Irrespective of the shape of the vessel

Answer: Option D

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