API standard 650 larger diameter tanks bottom plates

Some defects may be found after the regular safety inspection for the API standard 650 larger diameter tanks. The common API standard 650 larger diameter tanks defects are: Tank cracks, tank welding defects. The cracks on the base metal, surface and near surface of the tank wall shall be eliminated by grinding with circular arc, and then magnetic particle inspection or re inspection shall be carried out. Cracks in heat affected zone: generally, grinding method is used to eliminate cracks, and magnetic particle or dye flaw detection is used to confirm that there is no crack, and then repair welding or grinding smooth transition.

The seismic effects on the tank wall of API 650 oil storage tank include the inertia moment generated by the weight of the API standard 650 larger diameter 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.

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