API Std 650 cylindrical welded storage tanks maximum design pressure

The application of API 650 is as stated by the American Petroleum Institute: The production and installation of our ground welded steel API Std 650 cylindrical welded storage tanks storage tanks are generally used in industry; under normal circumstances, the storage tanks installed on the industrial site in the United States are in accordance with API 650, API 620 and API 12d Standards are established.

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 Std 650 cylindrical welded storage tanks 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.

Usually, the soil resistance of the foundation should be considered before the design and construction of API Std 650 cylindrical welded storage tanks. The soil endurance in the API Std 650 cylindrical welded storage tanks construction area plays a decisive role in the basic cost of the tank. In areas with high soil resistance, not only the cost of foundation treatment can be greatly reduced, but also the ratio of height to diameter of storage tank can be obtained. Therefore, the investment cost of the API Std 650 cylindrical welded storage tanks can be greatly saved in the area with large soil resistance.

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