API Std 650 aluminum tanks general requirements for delivery of plates

Inspection of API Std 650 aluminum tanks bottom: magnetic flux leakage scanning technology is used to detect the corrosion condition of API Std 650 aluminum tanks bottom plate (such as corrosion depth and area, crack length, etc.). When there is a defect in the bottom plate of the API Std 650 aluminum tanks, the magnetic field distribution will change and the sensor can detect it. The bottom of the oil tank should be free of foreign matters and dry during testing. Weld inspection of API Std 650 aluminum tanks bottom plate: when vacuum leak test method is used to detect the tightness of oil tank bottom plate, soap water shall be applied to the weld and vacuum box shall be covered for observation.

refrigerated tanks secondary components are those whose failure would not result in leakage of the liquid being stored. Secondary components also include those API Std 650 aluminum tanks components that are not in contact with the refrigerated liquid but are subject to the refrigerated temperature vapors and have a combined tensile and primary bending stress under design conditions that does not exceed 6000 lbf/in.2. Secondary components that could be designed within this reduced stress are roof plates, including roof manways and nozzles with their reinforcement, roof-supporting structural members, and shell stiffeners.

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The seismic effects on the tank wall of API 650 oil storage tank include the inertia moment generated by the weight of the API Std 650 aluminum tanks tank and the hydrodynamic pressure of the reservoir, which can be divided into short period pulse pressure and long period fluid slopping convective pressure.