Process equipment is subjected to higher temperatures during their service life. This higher temperature causes thermal stresses in various parts of the equipment. Excessive differential expansion of the equipment sometimes leads to its failure. Hence such severe conditions need to be analyzed in order to ensure the safety of the equipment.
The equipment (Pressure vessel/Heat exchanger) was analyzed using the Finite Element Method to determine the induced stresses due to differential thermal loading. In order to assess the structural strength of the equipment, guidelines from ASME BPVC (Boilers & Pressure Vessels Code) Section VIII Div. 2 part 5 was utilized. For Thermal analysis, as secondary stresses are induced in the geometry hence membrane stresses are not evaluated. The induced stresses are observed to be within the allowable limit. Hence, the structure’s design was predicted to behave safely during operation without premature failure.