Vertical vessels - vessel rigging analysis, Mechanical Engineering

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Vertical vessels having height-to-diameter ratios greater than 8 and weighing more than 25,000 lb. (11300 kg), shall have bending stresses in the vessel shell/skirt checked, from the loadings imposed during the lift from the horizontal to vertical position. Calculated general primary membrane tensile stress shall not exceed 80% of the materials specified minimum yield strength at 100oF (38oC) and calculated compressive stress shall not exceed 1.2 times the B factor obtained from Section VIII. It is recommended that vessel lifts be made when wind speeds are less than 25% of design wind velocity, and the resulting wind load (at 25% design wind velocity) is included in the consideration of the lift.


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