Fuel gas pipeline sealing construction method

The invention relates to a fuel gas pipeline sealing construction method. The fuel gas pipeline sealing construction method comprises the following steps of: 1) welding a tube joint at one side of a to-be-treated fuel gas pipeline section, and mounting a clamping plate valve on the tube joint; 2) mounting a tapper on the clamping plate valve, opening the clamping plate valve, tapping a fuel gas pipeline through the tapper, closing the clamping plate valve after tapping is completed, and dismounting the tapper; 3) mounting a chip blowing device on the clamping plate valve, opening the clampingplate valve, applying pressure inert gas into a gas blowing tube, completely blowing chips around the fuel pipeline holes through a spray nozzle, and closing the clamping plate valve and dismounting the chip blowing device; 4) mounting a sealing device on the clamping plate valve, arranging a spherical container sealer on the sealing device, enabling the spherical container sealer to slide into the fuel gas pipeline throu