HG/T20592 (WN) butt welding with neck

Neck butt welding flange refers to a flange with a tapered neck and butt welding with the cylinder or pipeline. It is an integral flange. Due to the transition structure of the taper neck and the butt welding connection, the strength and rigidity of the flange are strengthened, and the butt welding flange is not easy to deform, has a good seal, and is widely used.

       The sealing surface forms are: raised surface (RF), concave surface (FM), convex surface (M), tenon surface (T), groove surface (G), full surface (FF)