If the vessel in Problems 23.21 and 23.22 were to handle 50% nitric acid, what material of construction would you recommend, and why?

Problems 23.22

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.