a cylindrical steam boiler shell of riveted construction. it is made from plates 18 mm thick, and has a diameter of 1.8 m. Calculate the circumferential and longitudinal stresses in the plates when the internal pressure is 800 KN/m2. If the ultimate tensile stress of the material used is 600MN/m2, and the efficiency of the longitudinal joint is 70 per cent, determine the factor of safety.
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