Over a quarter million underground sti-P3® cathodic protected tanks were been installed in the U.S. Thick urethane or FRP coated tanks without anodes, such as STI’s sti-P3®, became popular. Steel tanks were fabricated with a second wall of steel or with a non-metallic jacket made of FRP or HDPE.
Secondary containment became a desirable feature in tank design.
Existing non-protected steel tanks were field-upgraded with internal linings and impressed current cathodic protection.īetween 19, a strong concern for the environment further advanced the technologies used to safely store hazardous liquids underground. Shop-fabricated steel tanks were built with various forms of corrosion protection design through the use of plastic “baggies,” thick reinforced fiberglass coatings, and galvanic anodes in conjunction with coal tar epoxy coatings. Around World War II, galvanized tanks were replaced by primed or asphalt painted tanks.īetween 19, the concern for lost inventory became a driving force to prevent underground steel storage tanks from corroding. to regulate flammable liquids, and standards for performance testing and construction, were developed in the first quarter of the 20th century.Īs the use of motorized vehicles became the most common mode of transportation, storage tanks were installed underground for reasons of safety, convenience, and aesthetics. Wooden barrels were replaced by riveted steel tanks and eventually, welded steel storage tanks. The means to store hazardous liquids has changed considerably since the discovery of oil in Pennsylvania in 1859.
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