Pushing Elbows, Stamping Elbows, Butt Welding Elbows, and Shrimp Waists
Yadu Group was founded in 1983.Our factory specializes in the production of High Pressure Pipe fittings (elbow,tee,reducer,pipe cap) , Pipes (Seamless, ERW, HFW, LSAW, SSAW Pipe) & flange in China over 40 years.
Among them, there are four production processes for elbows, as follows：
Elbow production method 1: pushing
Pushing elbow is the most important forming production process of elbow. Pushing machine, mandrel and heating equipment are needed. The finished tube blank is put on the mandrel, and it is pushed, heated and formed at the same time. This method has a fast production speed and is suitable for mass production, and the manufactured elbow has a beautiful appearance and a relatively uniform thickness.
Elbow production method 2: stamping
Stamping elbow is an early elbow forming process. Depending on the material, you can choose cold pressing or hot pressing. Put the tube blank into the outer mold. After the upper and lower molds are combined, under the push of the press, the tube blank moves along the gap reserved between the inner mold and the outer mold to complete the forming process.
Elbow production method 3: butt welding
Butt welding elbow is to use steel plate, draw a picture to draw the expansion diagram of butt welding elbow, then cut the material by gas cutting, then heat and press it on the press to form, and then come out two and a half elbows, and then cut the mouth, Then splicing and welding, the butt welding elbow is formed.
Elbow production method 4: shrimp waist
The shrimp waist elbow is welded by using multi-section coiled pipes with different angles. Compared with the first three processes, the shrimp waist elbow is much less used. This process is suitable for manufacturing large elbows with any specifications larger than 1.5D.
