Clamp the spigot end of the pipe and fittings on the butt welding machine, and clean the spigot end; move the movable clamp, plan the connecting surface of the pipe and fitting on the milling cutter, remove the milling cutter, and check the connecting surface of the pipe end to make it clear Not more than 0.3mm; align the two corresponding parts to be connected on the butt welding machine so that they are on the same axis, and the wrong side should not be greater than 10% of the wall thickness; place the heating tool between the two connecting surfaces. Make the pipe on the butt welding machine close to the heating tool and apply a certain pressure, and the straight motion melts to form a smooth and symmetrical flanging along the entire outer circumference of the pipe; after heating, the parts to be connected should be quickly separated from the butt heating tool, and a uniform external force should be applied to make They come into contact, forming a uniform flange.
