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 includes a plurality of first flanges formed extending from the upper edge of the pipe provided in the gas storage tank, and a second flange extending from the lower edge of the valve to be replaced and seated on the upper surface of the first flange. Of the bolts and nuts, the bolts and nuts (hereinafter, completely removed 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 so as to be separated by a predetermined distance. In the state of forming the bolt and nut (hereinafter, an incompletely untreated bolt nut), the valve to be replaced is lifted and inserted into the space formed by being spaced apart by the predetermined distance, and an area of the first flange and 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 detachably connecting the first unit and the second unit to maintain the first unit covering the first flange. It is related to a separation valve installation and installation device and a separation and installation method using the same.