Pipe wrench. The utility model comprises a clamp handle and a chain hinged with one end of the clamp handle, and a tooth meshing with the chain is arranged at the front end of the clamp handle. Further, the chain is hinged to the clamp handle by means of a connecting plate, i.e. one end of the chain is hinged to one end of the connecting plate, and the other end of the connecting plate is hinged to the clamp handle. The teeth at the front end of the forceps handle are distributed in circular arc. The chain tongs at work, the chain of the hinged end is free, and not with pliers handle fixed or hinged, pipe fittings of clamping, rotate by the pipe fittings and the friction between its chain, and torsion is by forceps handle front end of meshing force produced by the local rock and chains pliers handle no hypothesis point in pipe surface. Therefore, the chain pipe wrench of the utility model overcomes the deficiency of the existing chain pipe wrench, and can clamp and rotate not only metal pipe fittings, but also ceramic pipe fittings, thin-wall pipe fittings and plastic pipe fittings, without causing bite marks and damaging the surface of pipe fittings.
