Plugging device for pipeline flange leakage

The utility model discloses a plugging device for pipeline flange leakage, and relates to the technical field of propane dehydrogenation device production equipment, the plugging device is provided with flanges, gaskets and fastening bolts, the plugging device comprises a corrugated pipe, a sealing nitrogen pipe and a pressure gauge, two ends of the corrugated pipe are respectively welded on the side surfaces of the two flanges, the sealing nitrogen pipe is arranged outside the corrugated pipe, and the pressure gauge is arranged on the sealing nitrogen pipe. A pressure guiding pipe is installed outside the corrugated pipe, and a pressure gauge is installed on the pressure guiding pipe. The structure that the corrugated pipe is welded to the side face of the flange is used, the sealing effect is better, installation is easy and convenient, reliability is good, the leakage condition of the flange is detected through the pressure gauge, flammable and explosive media can be prevented from making contact with oxyg