Flat welding ring loose set flange plate is movable Flange, generally supporting in the water supply and drainage accessories (expansion joint on the most common) , manufacturers factory expansion joint on both ends have a Flange, it is directly connected with bolts for piping and equipment in engineering.
The purpose of using the flat welding ring loose flange is to save material. The structure is divided into two parts, one end of the pipe is connected with the pipe, the other end is made into flanging, and the Flange is sheathed on the flanging. The flange is made of low grade material, while the pipe is made of the same material as the pipe to save material.
