Butt welding neck flange

Butt welding neck flange refers to a flange with a tapered neck  butt welding with a cylinder  pipe. It is an integral flange.

Due to the transitional structure of the tapered neck  the butt welding connection, the strength  rigidity of the flange are strengthened,  the sealing is better than that of the flat welding flange. Disadvantages are the need to use forgings to manufacture, consume more materials,  have large manufacturing costs. It is suitable for occasions with high pressure  temperature  high sealing requirements.