The diameter of API Std 650 cylindrical liquid-storage tank

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Usually, the wind load in the API Std 650 cylindrical liquid-storage tank construction area should be considered before the tank design and construction. The wind load in the API Std 650 cylindrical liquid-storage tank construction area has an impact on the stability and economy of the API Std 650 cylindrical liquid-storage tank. In the area with large wind load, it is safe to design the tank as "squat". When calculating the wind force, the influence of the thickness of the insulation layer of the API Std 650 cylindrical liquid-storage tank, the shape of the ladder, the platform, the pipeline and the top cover must be considered.

In this project, a cylindrical tank 62 ft 6 in. in diameter is designed for an internal pressure of 4 lbf/in.2 gauge in the vapor space. The plate material is ASTM A131 steel with appropriate grades for different plate thicknesses in accordance with Table 4-1 for a design metal temperature less than 65°F but not less than 25°F. No corrosion allowance is required for any portion of the tank. The top course of the butt-welded cylindrical sidewall is 1/4 in. thick. The roof is a single lap-welded spherical dome with an internal radius of 50 ft and a thickness of 1/4 in. The maximum design liquid level is 6 in. below the plane of the juncture of the tank API Std 650 cylindrical liquid-storage tank roof and sidewall.