CB Mills (Chicago Boiler Company) has been involved with the Steel Tank Institute/Steel Plate Fabricators Association (STI/SPFA) since 1916, as one of the original founding companies. For over a century, we’ve provided safe, compliant, and durable storage tank solutions for a wide range of industries.
Today, STI/SPFA tanks offer proven above ground and underground storage technologies that meet stringent performance and safety requirements.
Aboveground Storage Tank (AST) Technologies
- F921® Double-Wall Steel Tank – Provides secondary containment with a built-in interstitial space for added safety.
- F911® Open-Top Diked System – Combines a steel tank with an integral, open-top dike for spill containment.
Underground Storage Tank (UST) Technologies
- STI-P3® Cathodically Protected Steel Tank – Features a pre-engineered cathodic protection system that safeguards the steel tank against corrosion, ensuring long service life underground.
Why Chicago Boiler Company?
With over 135 years of experience and as a founding member of STI/SPFA, Chicago Boiler has a long legacy of fabricating tanks that exceed industry standards. Whether your application requires an aboveground or underground design, we deliver tanks that provide safety, compliance, and reliable performance.
