Hydrotesting not required under new API-653 procedure

Here are two examples of major tank repairs: a man-way installation (top) and elevation ("jacking") of an entire tank shell.Click here to enlarge imageAn analytical method has been developed that allows aboveground storage tanks (ASTs) to be returned to service after major repairs without a hydrostatic test. Click here to enlarge imageThe method relies on an analysis of the repair or modification welds that calculates critical surface-defect size in the weldment.API guidelinesIn the last 10 years, the standard for AST inspection and repairs on tanks storing petroleum products has been API-653, Tank Inspection, Repair, Alteration, and Reconstruction. Proper application of this standard ...

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