The STI SP001 Standard by the Steel Tank Institute (STI) outlines the inspection and testing procedures for various types of aboveground storage tanks. Specifically, it applies to aboveground shop-fabricated tanks with a capacity of 50,000 gallons or less, small field-erected tanks, portable containers, and their associated secondary containment systems.
The Steel Tank Institute (STI), a division of STI/SPFA, is a global trade association that represents fabricators of steel storage tanks. STI is responsible for developing standards and recommended practices for the industry, including corrosion control, secondary containment designs, and installation guidelines. Additionally, STI licenses manufacturers to produce tanks according to its specifications and ensures quality control through inspections.
STI/SPFA serves its members, regulators, and the public by conducting research, developing industry standards and certification programs, and offering education, training, and safety initiatives. The organization also plays an active role in regulatory and code development processes in various countries. STI/SPFA’s membership is divided into four sections: Shop-Fabricated Tanks for petroleum, Field-erected Tanks for petroleum and water, Pressure Vessels, and Pipe for water transmission. Affiliate members provide materials and services to support these manufacturers.