Note: The redline version is a comparison between the original 2009 edition and the previous version, it does not include future addenda. However, the official base document that comes along with it does.

Covers the inspection, repair, alteration, and reconstruction of steel aboveground storage tanks used in the petroleum and chemical industries. Provides the minimum requirements for maintaining the integrity of welded or riveted, nonrefrigerated, atmospheric pressure, aboveground storage tanks after they have been placed in service.