Tanks, vessel and pipelines that carry, store or receive fluids are called Pressure vessel. A pressure vessel is defined as a container with a pressure differential between inside and outside. The inside pressure is usually higher than outside. The fluid inside the vessel may undergo a change in state as in case of a steam boiler or may combine with other reagent as in the case of chemical reactor. Pressure vessel often has a combination of high pressure together with high temperature and in some case flammable fluids or highly radioactive material. Because of such hazards it is imperative that the design be such that no leakage can occur. In addition, vessel hat to be design carefully to cope with the operating temperature and pressure. In this paper, the analysis on pressure vessel with variation of hole and outside temperature variation is carried out to find the stresses in pressure vessel. First, the finite element approach is used to evaluate the stresses in the closed pressure vessel and with varying material and outside temperature. Further the finite element approach is used to evaluate the stresses in the pressure vessel with holes on circumference and with varying material and outside temperature

Keywords : Pressure Vessel, Fluid, Stresses, Circumference, Temperature, Material.