First of all, welding a cross-section polygon or a multi ring shell fan shell with many closed ends. After the internal pressure is filled with medium pressure, the cross-section polygon under the action of internal pressure and internal pressure gradually becomes round, and finally becomes a ring shell.

The qualified flat welding flange is generally suitable for low pressure, and the pressure fluctuation, vibration and influence of pipeline system are not serious.

The automatic welding production of large-diameter elbows in Haihao Group

High pressure elbow has certain corrosion (oxidation acid, organic acid, cavitation), heat resistance, wear resistance. Check the internal and external anti-corrosion coating of the pipe before the pipe is qualified.

Troubleshooting: increase the pressure adjustment of guide die.

The side projection of carbon steel elbow of hydraulic bending equipment is based on the actual size.

Short radii are generally used to limit the installation position of low pressure liquids or bends. The inner and outer elbows and good appearance are used in the cold extrusion process. The wall thickness is uniform and the size deviation is very small. Therefore, the forming technology of stainless steel cone tube, especially the thin-walled stainless steel cone tube, is carried out by this technology.