a) A boiler shell is 1.5m in diameter and has plates of thickness 10mm. If the e
ID: 2995605 • Letter: A
Question
a) A boiler shell is 1.5m in diameter and has plates of thickness 10mm. If the efficiency of the longitudinal joint is 80% then calculate the working pressure assuming a safe working pressure of 50 N/mm2.
b) A cylindrical steam boiler shell is 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 600 MN/m2, and the efficiency of the longitudinal joint is 70 per cent, determine the factor of safety?
Explanation / Answer
a)diameter = 1.5m = 1500mm
thickness = 10mm
efficiency = 80%
safe load = 50N/mm
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