API 650 stainless and carbon steel tank shell
The main contents of safety inspection for atmospheric storage tank, API 650 stainless and carbon steel tank are to see whether the tank foundation is sunk, whether the tank is corroded, whether there are cracks in the tank body and bottom, whether there is concave convex phenomenon on the top and wall of the tank, whether the accessories of the storage tank are in good condition, etc. After the API 650 stainless and carbon steel tank safety inspection and detection, the defects found in the tank should be handled according to the inspection rules in time to ensure the normal and safe use of the storage tank in the later stage.
A cylindrical nozzle with a 12-in. inside diameter is located in solid plate in the sidewall of a cylindrical storage tank 60 ft in diameter so that its axis lies in a horizontal plane and forms an angle of 55° with a perpendicular to the sidewall at the point of intersection, as shown in Figure F-7. The thickness of the API 650 stainless and carbon steel tank sidewall plate, tw, in this area is 5/8 in., and no corrosion allowance is required. The total internal pressure, Pl + Pg, at the center of the opening is 26.1 lbf/in.2 gauge.
Under the action of the earthquake, API 650 storage tank is mainly damaged by the phenomenon of the lower part of the API 650 stainless and carbon steel tank tank wall. Therefore, the key point of seismic calculation is to prevent the tank wall from buckling under axial pressure.
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