Abstract: An improved inflammable liquid safety tank comprising a double walled tank body with the tank walls being interconnected by support plates. An intermediate container is formed by the inner wall structure of the tank and is adapted to hold inflammable liquid. A pressurized gas bottle is threadably mounted to a sleeve secured to and extending into the intermediate container. The pressurized gas bottle is selectively connected to the intermediate container to pressurize liquid held in the intermediate container. The pressurized gas bottle also communicates with the tank to pressurize a foam, nonflammable fluid, or cleaning agent placed in the chamber or outer compartment defined by the outer wall structure of the intermediate container and the inner wall structure of the tank body so that the foam, fluid or agent will be expelled from the tank if the tank wall is accidentally punctured. The outer compartment is preferably pressurized at a lower pressure than the intermediate container.

Abstract: A gasoline safety tank system utilizing at least one safety tank, each safety tank comprising a tank body with interchangeable inlet and outlet fittings secured to the tank body. A conduit is connected to the inlet fitting and extending into the tank body adjacent the floor of the tank body and below the level of liquid placed in the tank. A pressurized carbon dioxide bottle is selectively connected to the inlet fitting and adapted to discharge pressurized gas into said safety tank through the conduit so that the gas bubbles up through the liquid in the tank into the top of said tank simultaneously cooling said liquid and pressurizing the liquid in said tank. The carbon dioxide bottle is adapted to be alternatively connected to the outlet fitting to pressurize the liquid and propel the liquid out of said inlet fitting and through the conduit.