Acylindrical pressure vessel of an internal diameter of 1829mm is to have a design pressure of 0.86 mpa. the longitudinal weld will have a joint efficiency of 85%. a life of 30 years is desired when exposed to a corrosion rate of 0.125mm per annum. determine the nominal thickness of steel plate that must be ordered from the supplier given that the design tensile strength of the material is 115 mpa and there is a tolerance on nominal thickness of ±10%. the commercial thicknesses are in 0.5 mm increments. assume the only loads on the vessel are those due to pressure.