A cylindrical vessel has an internal diameter of d=2m. It is made of a material having a thickness of t=12.5 mm. If the tensile stress induced in the plating is to be limited to σ= 100MPa, and a factor of safety of S=1, determine the safe internal pressure to which the vessel may be subjected. The efficiency of the longitudinal and circumferential joints are a of ηL​=80%, and initial velocity ηC​=50%