Patent ID: 6422413
Filing Date: 2002-07-23
Classification: B65D

Abstract:
An above-ground storage tank for storing a flammable liquid comprising:a 10 gauge steel outer shell having a bottom surface, side surfaces, and an open top; a {fraction (3/16)} inch thick steel inner tank having a bottom surface, side surfaces, and a top surface, the inner tank being disposed within the outer shell, the bottom surface of the inner tank being spaced apart 6 inches from the bottom surface of the outer shell, the side surfaces of the inner tank being spaced apart 6 inches from the side surfaces of the outer shell to form a space between the inner tank and the outer shell; a plurality of bottom spacers disposed between the spaced apart bottom surfaces of the inner tank and the outer shell without extending to the side surfaces of either the inner tank or the outer shell, each bottom spacer being attached to the bottom surface of the inner tank and to the bottom surface of the outer shell; a plurality of side spacers disposed between the spaced apart side surfaces of the inner tank and the outer shell without extending to the bottom surface of either the inner tank or the outer shell, each side spacer being attached to a side surface of the inner shell and being attached to a side surface of the outer shell, the plurality of side spacers preventing the inner tank from floating within the outer shell, at least two of the plurality of side spacers being disposed on opposite sides of the inner shell and having an aperture therethrough for receiving a hook for lifting the storage tank; an initially pourable, fire-resistant insulating material disposed to completely fill the space between the inner tank and the outer shell; a plurality of hat-shaped 10 gauge steel vertically extending side supports attached to the inner surfaces of the inner tank to strengthen the sides of the inner tank, at least one hat-shaped 10 gauge steel horizontally extending top support attached to the inner surface of the top of the inner tank to strengthen the top of the inner tank; a plurality of horizontally extending cross-rib supports having opposite ends attached to side supports on opposite sides of the inner tank; a plurality of C-channel shaped spacers attached to the bottom surface of the bottom of the outer shell, each spacer having two extension portions that extend beyond respective opposite sides of the outer shell, each extension portion having an aperture therethrough for receiving a mounting fastener; and a plurality of pipe fittings attached to the top of the inner tank.