UL Subject 2085

These requirements cover shop fabricated, aboveground atmospheric Protected Tanks intended for storage of stable flammable, or combustible liquids that have a specific gravity not greater than 1.0 and that are compatible with the material and construction of the tank.

These requirements do not cover Fire Resistant Tanks which are intended for installation and use in accordance with the Automotive and Marine Service Station Code, NFPA 30A. These tanks are covered in UL’s Outline of Investigation for Fire Resistant Tanks for Flammable and Combustible Liquids, Subject 2080.

These tank constructions are intended to limit the heat transferred to the primary tank when the construction is exposed to a 2-hour hydrocarbon pool fire and are provided with protection from physical damage. Tanks appropriately identified by product markings provide additional protection for the primary tank against projectile impact and vehicle impact.

These tanks shall be provided with integral secondary containment intended to prevent any leakage from the primary tank from entering the environment.