Heat insulation structure of storage tank

PURPOSE: A heat-insulation structure for a storage tank capable of easily controlling the tension of a wire installed around the circumference of the tank is provided to flexibly correspond to the expansion and the contraction of the storage tank. CONSTITUTION: A heat-insulation structure for a storage tank comprises a storage tank(110), a vertical wire(120), a horizontal wire(130), a plane type expansion joint(140), plural heat-insulation panel(150), a spring type expansion clip, and a joint type molding clip. Water and oil are stored inside the storage tank. The vertical wire is vertically mounted on the outer surface of the storage tank, and the horizontal wire is horizontally mounted on the outer surface of the storage tank. The plane type expansion joint is installed on the vertical and horizontal wires. The heat-insulation panel are installed on the outside of the storage tank, and includes flanges on both ends.