FIREGUARD® General Info

The new generation of fire-rated storage tanks

  • The first tank of its design to obtain a UL listing for secondary containment
  • Secondary containment can be tightness tested on-site with standard testing procedures
  • Exterior steel wall provides superior weatherability and low-cost maintenance
  • Unique thermal insulating material is 75% lighter than concrete
  • Technology is patented under US Patent #5695089 by the Steel Tank Institute
  • Is a UL approved core component for the UL2244 system listing

The only tank that meets all of these standards

  • UL 2085 Listed "Protected" tank
  • ULC S655 Listed "Protected" tank
  • Both the Inner and Outer steel tanks are built to UL/ULC standard
  • Uniform Fire Code 2000 Article 79 and Article 79-7
  • UL 2244 Aboveground Flammable Liquid Tank System
  • National Fire Protection Association (NFPA) 30 & 30A
  • International Fire Code (IFC) 2000
  • Building Officials and Code Administrators (BOCA) National Fire Prevention Code
  • Southern Building Code Congress International (SBCCI) Standard Fire Prevention Code
  • State of California Air Resources Board
  • Steel Tank Institute (STI) Standard F941 for Thermally Insulated Aboveground Storage Tanks


All tanks manufactured by a Fireguard® Licensee must be built in strict conformance with Fireguard® Specifications and are to be covered by a limited manufacturer's warranty. This technology is licensed by Steel Tank Institute and incorporates a third-party quality control program and a UL / ULC Listing.

To control quality, STI employs a staff of independent third party quality control inspectors making unannounced visits to plants. This inspection service is mandatory for all Licensees. These inspection services assure that tanks are fabricated in strict accordance with the latest edition of the Fireguard® Specifications. Any tank determined not to conform to this specification must be corrected and reinspected by the tank manufacturer. STI may inform the Licensee that reinspection by third party quality control inspectors will be required prior to shipment.


The Fireguard® specification covers

a) a method of thermally insulating an aboveground storage tank for the purpose of providing a two hour fire rating. This design utilizes a double wall steel tank with a monolithic insulation placed into the interstice of the tank. Both the primary and the secondary tank are equipped with emergency vents. It also addresses the inspection, testing and installation of these tanks.

b) a tank assembly that has been fully tested by Underwriters Laboratories in accordance with UL2085 and UL Subject 2080 and has two listings: Protected Secondary Containment Aboveground Tanks for Flammable Liquids and Fire Resistant Secondary Containment Tanks for Flammable Liquids.

c) an interstitial space has been tested to ensure that

  1. fluid will flow and be detectable and
  2. that the emergency venting will work properly in the event of a pool fire.

d) This tank was tested in accordance with NFPA 30A, and UFC Appendix A-IIF-1.


Fireguard Tank  Fireguard Tank

Fireguard tank

The Ecostation® is manufactured at the Clemmer Steelcraft Technologies facility in Waterloo, Ontario, Canada.



Ballistics Protection: A method of tank construction in which the tank system has a tested ability to prevent penetration of a bullet into the primary tank. The ballistics test shall require that the tank be shot five times with a 150 grain (9.72 g) M-2 ball ammunition, having a muzzle velocity of 2700 feet per second (823 meters per second), fired from a .30 caliber rifle at a distance of 100 feet (30.5 m).

Hose Stream Resistant: A method of tank construction in which the tank system has a tested ability to prevent leakage of the primary tank or damage to the insulation material when the completed tank assembly is impacted with a stream of water for 2 minutes, as per the UFC test criteria, with the purpose of simulating a fire hose. This test shall be conducted immediately after the furnace test.

Impact Protection: A method of tank construction in which the tank system has a tested ability to prevent leakage of the primary tank if impacted by a vehicle. Testing shall consist of hitting the completed tank assembly with a 12,000 pound (5455 kg) weight moving a 10 m.p.h. (16 kph), 18" (457 mm) off the ground in a one square foot area.

Monolithic Insulation: The insulation material in a Fireguard tank used to minimize heat transfer from the secondary tank to the primary tank. This insulation material is a pourable material consisting of perlite, cement, water and STI ingredient B, or other approved ingredient, all carefully mixed to the correct proportions.

Protected Tank: An aboveground atmospheric tank with secondary containment and an insulation system intended to reduce the heat transferred to the primary tank when the tank is exposed to a hydrocarbon pool fire, and provided with protection from physical damage.

Secondary Containment Aboveground Tank: A primary containment tank is encompassed by a steel secondary tank forming an interstitial (annular) space. This space is capable of being tested or monitored for leakage.

Two Hour Fire Rating: A certified rating that indicates a storage tank system which has the ability to maintain the temperature of the primary tank surface below a specified limit when exposed to a 2-hour fire test.