An aboveground, shop fabricated, secondarily contained vessel designed to store flammable and combustible liquids constructed according to Underwriters Laboratories Standard 2085 entitled Protected Aboveground Tanks for Flammable and Combustible Liquids. 

A UL 2085 tank is intended to limit the heat transferred to the primary tank during a fire and to protect the tank from physical damage. 

See also PEI/RP600, UL 80 tank and UL 142 tank.