5083 aluminum shapes API Std 650 self-anchored flat-bottom tanks

The vent pipe mouth should be 4m or more above the ground. The nominal diameter of the API Std 650 self-anchored flat-bottom tanks API 650 petroleum storage tank vent pipe should be no less than 50mm and a flame arrestor should be installed.

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 self-anchored flat-bottom tanks roof and sidewall.

For the welding of API Std 650 self-anchored flat-bottom tanks bottom, attention should be paid to the slag removal and drying of the welding joint before welding, and there is no sediment and oil contamination in the lap joint of steel plate. The manufacturing quality and production efficiency of the central plate can be obviously improved by adopting the rolling central plate. The butt joint is used between the rolling plates to improve the installation conditions of the central plate at the bottom of the API Std 650 self-anchored flat-bottom tanks. The welding sequence of the central plate is from the center of the central plate to the surrounding.

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