REMOVAL AND INSTALLATION APPARATUS FOR CUTOFF VALVE OF NOZZLE PORTION ON GAS STORAGE TANK AND THE REMOVAL AND INSTALLATION MEHTOD USING THIS

摘要

The present invention is formed of a first flange extending from the upper edge of the pipe provided in the gas storage tank and a second flange formed extending from the lower edge of the valve to be replaced, and a plurality of fastening and fixing the second flange that is seated on the upper surface of the first flange. Of the bolts and nuts, the bolts and nuts (hereinafter, fully taken out bolt nuts) completely separated from the first flange and the second flange, and the upper surface of the first flange and the lower surface of the second flange are loosened to a predetermined distance. In the state of forming the bolt and nut (hereinafter referred to as an incompletely untreated bolt nut), the valve to be replaced is lifted and inserted into the spaced apart spaced apart by the predetermined distance, and the partial area of the first flange and the opening of the pipe are opened. A first unit covering the entire upper surface; A second unit detachably coupled to an outer circumferential surface of the piping and disposed on a lower side of the first unit; And a third unit removably connecting the first unit and the second unit to maintain the state in which the first unit covers the first flange. It is related to a separation valve installation and installation device and a separation and installation method using the same.