Butt welding flange with neck refers to a type of flange with a taper neck and butt welding with the barrel or pipe belongs to the integral flange.
Because of the taper neck transition structure and butt welding connection, the strength and stiffness of the flange have been strengthened, and the sealing is better than that of the flat welding flange. The disadvantage is that forgings are needed to manufacture, which consumes much material and costs much to manufacture. Suitable for applications with high pressure, high temperature or high seal requirement.
