Abstract: A liquid storage tank for storing a dual temperature liquid comprising an enclosed tank which is circular in horizontal section; a vertical radial stationary partition in the tank; a vertical radial partition in the tank rotatably movable about the vertical axis of the tank; a seal preventing liquid flow between opposite sides of the movable partition and opposite sides of the stationary partition; an opening for feeding a liquid to a first side of the stationay partition and withdrawing liquid therefrom; and an opening for feeding a liquid to a second side of the stationary partition and withdrawing liquid therefrom.

Abstract: A method of applying a coating to the inside surface of a double-curved shell circular in horizontal section. Apparatus having a work platform for coating equipment is positioned in the shell. The work platform is displaceable on extendable and retractable legs so that it can move vertically and horizontally so as to be positioned adjacent the shell. As the apparatus is rotated about its vertical axis a coating is applied from the work platform to the shell surface as a horizontal band extending circumferentially around the shell surface. By extending or retracting the legs, the work platform can be positioned adjacent an area of the shell surface which has not been coated and that area coated as described.

Abstract: Apparatus for applying a coating to the inside surface of a spherical or spheroidal shell comprising a work platform for coating equipment; a first extendable and retractable leg in compression joined at its upper end to the platform and joined at its lower end through a horizontal axis pivot to a collar rotatable about a vertical axis on a lower fixed base; and a second extendable and retractable leg in tension joined at its lower end to the platform and joined at its upper end through a horizontal axis pivot to a collar rotatable about a vertical axis on an upper fixed base spaced upwardly from the lower fixed base whereby the lower end of the first leg and the upper end of the second leg can rotate about the same vertical axis.A method of coating the inside surface of a spherical or spheroidal shell using the apparatus is also disclosed. By use of the apparatus horizontal bands of a coating are applied to the shell surface. The coating can be an insulating foam.