1. A spherical gas container, 52 ft in diameter, is to hold gas at a pressure of 50 psi. Calculate the thickness of the steel wall required. The allowable tensile stress is 20,000 psi.
2. Calculate the tensile stresses (circumferential and longitudinal) developed in the walls of a cylindrical pressure vessel. The inside diameter is 18 in. The wall thickness is 1 4 in. The vessel is subjected to an internal gage pressure of 300 psi and a simultaneous external axial tensile load of 50,000 lb.