Vertical tanks may be of single or double wall construction. Tanks are built to Underwriters Laboratories specification standard UL-142. Tanks may also be built with or without multiple compartments for multiple fuel storage. If the tank is a double wall configuration, then it has interstitial monitoring capabilities. Horizontal tanks may be single or double wall construction. Only new steel materials are used in tank constructions.Įach tank is sized with the appropriate normal and emergency vent openings as defined in the tank's standard of construction. Tanks can be furnished with stationary support saddles, anti roll supports or structural skids. Maximum allowable working pressure is 0.5 psig as measured from top of tank. UL-142 tanks are steel atmospheric tanks intended for aboveground storage of non-corrosive, stable, flammable, and combustible liquids.
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