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1.) A customer asks you to design a pressure vessel which must be operated at maximum operating absolute pressure of 6 kgf/cm. Your boss tells
1.) A customer asks you to design a pressure vessel which must be operated at maximum operating absolute pressure of 6 kgf/cm. Your boss tells you to add 5% extra to the maximum operating pressure. The pressure vessel is made up of IS 2002-1962 2B material. The design temperature is 425C. The outer diameter of the pressure vessel is 1.7m. The corrosion allowance is 3 mm. The pressure vessel is fabricated according to Class 2 IS specification where single welded butt joint with backing strip is used. a) What will be the design pressure? (Note Atmospheric pressure is given as 1.033 Kgr/cm) (3) b) Based on the data produced, what is the allowable stress value? (2) c) What is the welding joint efficiency factor based on the given data? (1) d) What will be the standard plate thickness to fabricate the vessel in cylindrical and spherical designs? (4) e) Suppose the customer changes his mind and asks for a IS 2041-1962 20M055 alloy-based material. What will be the modified thickness values for the cylindrical and spherical vessels? Calculate the percentage increase or decrease in the new thickness values for the mentioned alloy with respect to the IS 2002-1962 2B material
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