Repeat Problem 23.21 but using 316 SS as the material of construction. If the relative costs of

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Repeat Problem 23.21 but using 316 SS as the material of construction. If the relative costs of 316 to 304 SS are 1:1.29, and both materials are suitable for the service, which material do you recommend?

Problem 23.21

Determine the mass of a pressure vessel made of 304 stainless steel (SS), with standard (ASME) dished heads. The dimensions of the vessel are a diameter of 2.4 m and a length of 8.5 m (tangent-to-tangent). The design pressure and temperature of the vessel are 3.7 MPa and 450°C, respectively. You should assume a corrosion allowance of 6.35 mm and that nozzles and manways will contribute an additional 15% to the mass of the vessel. In addition, you should assume that all welds are double-welded butt joints with spot radiographed examination.

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