API standard 650 aboveground welded storage tanks heat-affected zone

For the welding of API standard 650 aboveground welded storage 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 standard 650 aboveground welded storage tanks. The welding sequence of the central plate is from the center of the central plate to the surrounding.

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The working pressure of the low-pressure storage tank is greater than that of the atmospheric storage tank, but its pressure is less than 0.1MPa. API 650 petroleum storage tanks are classified according to their environment: Above-ground storage tank: refers to the bottom of the storage tank at the design elevation of API standard 650 aboveground welded storage tanks and above; the bottom of the tank is below the design elevation of +0.00 but not exceeding.