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sti-P3 Technology

     Back to Shop Fabricated Atmospheric Tank Documents

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RP for Corrosion Protection of Underground Piping Networks Associated with Liquid Storage and Dispensing Systems (R892)
Revised: Jan-2006 PDF Format

The Recommended Practice for Corrosion Protection of Underground Piping Networks Associated with Liquid Storage Systems was developed by the Steel Tank Institute to assist owners and installers of underground and aboveground tanks in the design, installation and monitoring of corrosion control systems for underground metallic piping


Specification for Tanks Using Low Levels of Pressure in the Tanks Interstice ( (R951)
Revised: Jan-2006 PDF Format

This specification covers the requirements for manufacturing a steel tank using low pressure in the interstice for monitoring.


Recommended Practice for the Addition of Supplemental Anodes to sti-P3® USTs (R972)
Revised: Dec-2010 PDF Format

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.


Test Procedure to Qualify a Coating for Acceptance by sti-P3® Specifications (T871-94)
PDF Format

The test procedure outlined herein shall be employed when a coating manufacturer seeks approval of a certain coating system for inclusion in the sti-P3 Specifications.  Because of the essential importance of the coating to the sti-P3 corrosion control system, only this series of laboratory tests, properly conducted and satisfactorily concluded, will be considered.


sti-P3 Installation Instructions (R821)
Revised: Februrary 2017 PDF Format

Installation instructions pointing out important considerations and items when installing a sti-P3 tank


Impressed Current Systems - Ask the Expert


Consideration of Extraneous Voltage Components in Tank-to-Soil Potentials Obtained for Cathodic Protection Monitoring of sti-P3 Tanks by William Carlson & N. Dennis Burke


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