Today's national standard carbon steel DN400WN with neck butt welding flange price trend

Today's national standard carbon steel DN400WN with neck butt welding flange price trend Carbon steel WN with neck butt welding flange connection is a common connection in a variety of containers and process lines. Hebei Yunhai pipe fittings manufacturers take into account the requirements of the production process or consider the convenience of manufacturing, transportation, installation and overhaul. The connection between the container and process piping often uses a detachable structure that is welding flange connection, which has a good connection strength and tightness , And the application of a wide range of sizes; Therefore, the welding flange welding joints are widely used in vacuum salting enterprises. Because the medium in the container and pipe is a sodium chloride solution (ie, brine). With neck butt welding steel pipe The flange refers to a single flange piece, one end of which is a welding end, which is welded to the pipe, and the other end is in the form of a sealing face flange, which is connected with the mating flange sealing surface. Today GB GB DN400WN with neck butt welding The trend of the flange market price is relatively strong. Corrosion of carbon steel WN neck welding flange has convex (RF), flat (FF), convex and concave (MF), etc. According to the shape of the bonding surface, it can be divided into the following Kinds: (1) Trapezoidal slot type: Use an oval metal ring as gasket, used in valves with working pressure ≥ 64 kg/cm2, or high temperature valves.

(2) Lens type: The gasket is a lens shape made of metal. For high pressure valves with working pressure ≥ 100 kg/cm2, or high temperature valves.

(3) O-ring type: This is a relatively new type of butt welded flange connection. It is developed with the appearance of various rubber O-rings.