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API 653

API 653 Standard for Tank Inspection, Repair, Alteration and Reconstruction

This standard covers steel storage tanks built to API 650. It provides minimum requirements for maintaining the integrity of such tanks after they have been placed in service and addresses inspections, repair, alteration, relocation, and reconstruction. The standard covers the tank foundation, bottom, shell, structure, roof, attached appurtenances, and nozzles to the face of the first flange, first threaded joint, or first welding-end connection and governs welded crude oil tanks that have been placed in service.