Flange plate mounting device

The utility model relates to the technical field of flange plates, in particular to a flange plate installation device which comprises a flange assembly and clamping mechanisms, the flange assembly comprises a pipeline and flange plates welded to the two ends of the pipeline, and the two sets of clamping mechanisms are arranged on the outer surface of the pipeline; the clamping mechanism comprises a base, a pressing plate, a worm gear, a worm, a connecting rod, a handle, a lead screw and arc-shaped grooves, the pressing plate and the base are arranged on the upper side and the lower side of the outer surface of the pipeline respectively, the arc-shaped grooves are formed in the opposite faces of the pressing plate and the base respectively, and the inner walls of the arc-shaped grooves are matched with the outer surface of the pipeline; according to the flange plate polishing device, the clamping mechanism is arranged, so that a pipeline can be clamped when the surplus height of a welding seam at the welding