API 653 - Tank Inspection, Repair, Alteration, and Reconstruction

Last update: Jul 01, 2016

API 653, Tank Inspection, Repair, Alteration, and Reconstruction, Fifth Edition, is a standard developed and published by the American Petroleum Institute (API) and covers the inspection, repair, alteration, and reconstruction of steel aboveground storage tanks used in the petroleum and chemical industries. The first edition of API 653 was published in in January of 1991. The fifth and most recent edition of the standard was published in November of 2014.

The requirements set forth in API 653 are meant to cover those steel storage tanks that were constructed under the standards of API 650 and its predecessor API 12C. If there are any conflicts found between this standard and those, API 653 is to take precedence. While it was specifically written to apply to those tanks constructed under API 650 and API 12C, API 653 can be applied to tanks constructed under other standards as well at the owner’s discretion.

This standard provides the minimum requirements for maintaining the integrity of welded or riveted, non-refrigerated and refrigerated, atmospheric pressure, aboveground storage tanks after they have been placed into service. It only applies to maintaining the integrity of the foundation, bottom, shell, structure, roof, attached appurtenances, and nozzles to the face of the first flange, first threaded joint, or first welding-end connection of the tank.
 

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