F921®

Double-wall steel tank

F921® aboveground storage tanks are manufactured with a double‐wall steel design. Standard features include built‐in, testable, interstitial monitoring capability and impermeable secondary containment. The F921® delivers uncompromising performance, reliability, service and economy.

F921® Features

  • Meets UL 142, Standard for Steel Aboveground Tanks for Flammable and Combustible Liquids
  • Double‐wall design offers integral, impermeable secondary containment to meet EPA SPCC requirements
  • Primary and secondary tank can be tightness tested on site with standard testing procedures, or manufacturer may ship with vacuum in the interstice to prove integrity of both walls during installation
  • Interstitial space can be monitored for leak detection
  • Primary storage tank and secondary containment compatible with a wide range of fuels and chemicals
  • Support designs available for all seismic requirements
  • Choose from many integral support types, including saddles and skids
  • Vertical tanks supported on legs, and skirted available, with listing label
  • Capacities range up to 75,000 gallons

F921® Benefits

  • Steel construction allows for recycling
  • Low cost compartments and customization
  • Built to nationally‐recognized STI standards with strict third‐party quality control inspection program

F921® is available from an extensive group of Steel Tank Institute fabricators who participate in the STI Quality Control Program. Under the program, independent quality control inspectors make unannounced visits to STI members, ensuring fabrication to the highest possible standards.

F921® Publications

STI Tank Technologies

Aboveground Storage Tanks (AST)

FIREGUARD®
Protected, thermally insulated secondary containment tank
Fire-tested, double-wall tank
F921®
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
ACT-100®
Steel/FRP composite tank
ACT-100-U®
Steel tank with an external urethane coating

Double‐wall jacketed underground storage tank

Gravity Oil Water Separators

Featured Affiliate

STICO Mutual Insurance Co., RRG

Formed by STI/SPFA in 1988, STICO Mutual is a national, member-owned insurance company, providing protection from General Liability, Pollution and Warranty exposures to tank, vessel and equipment manufacturers and contractors.

www.sticomutual.com

“STI/SPFA has allowed us to network with other fabricators to enhance our production capabilities.”

Coby Hayes
J . L. Houston Co