Effect of Mill undertollerance on Shell thickness calculation
During design of pressure vessel, I came across this issue number of time. Unfortunately, ASME VIII Div.1 doesn’t give a clear picture, whether to add the undertollerance in the min. required thickness as calculated by ASME VIII Div.1 ASME VIII Div. 2, give a clear cut understanding on this issue, can clears all ambiguity. (Clause…
Tube Holes in Tubesheet : Point to ne noted while designing heat exchanger
Tube hole finish affects the mechanical strength and leak tightness of an expanded tube-to-tubesheet joint. In general: (1) A rough tube hole provides more mechanical strength than a smooth tube hole. This is influenced by a complex relationship of modulus of elasticity, yield strength and hardness of the materials being used. (2) A smooth tube…
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