JIS B2220 (WN) butt welding steel pipe flange

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

The sealing surface forms include: raised surface (RF), concave surface (FM), convex surface (M), tenon surface (T), groove surface (G), full plane (FF), ring connection surface (RJ).