API
API 653
Tank Inspection, Repair, Alteration and Reconstruction
The in-service code for atmospheric storage tanks built to API 650 or its predecessors. It covers inspection intervals, shell and bottom evaluation, settlement assessment, and the rules for repairing or reconstructing a tank.
This is an explanation, not the standard. PipingInspector is not affiliated with API and reproduces no part of the document. Always work to the current edition of the standard itself and to your project specification.