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STI/SPFA R972

M00011889

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STI/SPFA R972 Recommended Practice for the Addition of Supplemental Anodes to sti-P3 USTs (R972)

standard by Steel Tank Institute/Steel Plate Fabricators Association, 12/01/2010

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On occasion, tank owners of sti-P3 tanks find that the cathodic protection readings are more positive than the NACE recommended -850 milli-volt criteria. In this case, the cathodic protection system must be supplemented so that the tank continues to be protected from corrosion. 1.2 The addition of supplemental anodes can bring the tank potential more negative than the recommended -850 milli-volt criteria. It does not, however, change the period of the manufacturer warranty on the tank.