STI Tank Technologies

Aboveground Storage Tanks (AST)

Protected, thermally insulated secondary containment tank
Fire-tested, double-wall tank
Double-wall steel tank
Safe and sturdy support for your backup or emergency power
Open-top diked system

Underground Storage Tanks (UST)

Cathodically protected steel tank
Steel/FRP composite tank
Steel tank with an external urethane coating

Double‐wall jacketed underground storage tank

Gravity Oil Water Separators
STI Technologies are available from an extensive group of Steel Tank Institute fabricators. Find an STI/SPFA fabricator member for your next shop fabricated tank project.

Fuel System Maintenance

Allowing water to accumulate in fuel storage systems can cause fuel degradation and damage the entire storage system.


The STI SP001 standard provides a means for aboveground storage tank owners to comply with EPA mandates.

STI/SPFA Product Awards

The STI/SPFA Product Awards recognize steel construction product achievements that exemplify the steel tank industry.

STI Shop Fab Tank Section

Specifications, technical documents, and inspection forms for STI Technologies. STI Shop Fabrication Section members only.

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Quality Control Program

Quality control is a crucial aspect of all manufacturing processes. Therefore, member fabricators of the Steel Tank Institute’s licensed tank technologies are subject to periodic, unannounced inspections by a team of STI/SPFA Quality Control Inspectors.

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Aboveground Storage Tank FAQ

Get answers to commonly asked questions about aboveground storage tanks including differences between tanks and fire code information.

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Education and Training

Codes and Regulations

Find information on federal and state fuel storage environmental regulations, chemical storage tank regulations, fire codes, and more.

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Alternative Fuels

View compatibility studies for steel and alternative fuels/emerging fuels.

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About Steel Storage Tanks

Additional Resources


Position Papers

Featured Affiliate

Phoenix Forging Company

Phoenix Forging Company, a member of the Phoenix Forge Group, is a proud domestic manufacturer of steel tank and cylinder fittings based in Catasauqua, PA. Phoenix Forge was founded in 1882.

“STI technologies have better industry recognition than any of our individual brands.”

Greg Scalet
Steel Tank & Fabricating Corp.

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