The ID mounted flange facing machine is designed for the Flange facing, seal groove, serrated finish, weld prep. and counterboring. with the latest line and ball screw technology, the equipment adopts the modular design concept as a whole. Each step of design takes the field processing as the starting point. This machine is widely used in the flange connecting of Petroleum, chemical, natural gas and nuclear power. With the light weight,this machine is helpful for the on-site maintance. It ensures the high security and efficiency.