Pressure vessels are subjected to fluctuating loads either mechanical or thermal depending on their service subject. This loading is dangerous than other loadings as the structure will experience sudden failure without any prior indication. Hence fatigue calculations need to be part of the design of a vessel.
Process equipment manufacturer from India & Abroad approached ANALYZER to seek assistance in evaluating the design of their newly developed vessels to multiple fatigue loadings using simulation techniques & provide the solution in case of any observed fatigue failure.
The pressure vessel was analyzed using the Finite Element Method to determine the induced stresses due to various cyclic loadings. In order to assess fatigue strength for the vessel, guidelines from ASME BPVC (Boilers & Pressure Vessels Code) Section VIII Div. 2 part 5 & Annexure 3.F was utilized. The fatigue calculations were performed & fatigue damage factor is found much below unit value. Hence, the structure’s design was predicted to behave safely during operation without premature failure.