A flat welding flange with neck is connected to the pipe end. It is mainly a part that connects the pipe and the pipe to each other. There are holes on the flat-welded flange with neck, bolts can be used to make the two flanges tightly connected, and the flanges are sealed with gaskets. The connection of flat-welded flange with neck is composed of a pair of flanges, a gasket and several bolts and nuts. The gasket is placed between the sealing surfaces of the two flanges. After tightening the nut, the specific pressure on the gasket surface reaches a certain value and deforms and fills up the unevenness of the sealing surface to make the connection tight and leak-proof. Flange connection is a detachable connection. According to the connected parts, it can be divided into container flange and pipe flange. The neck flat welding flange is suitable for the connection of steel pipes whose nominal pressure does not exceed 2.5MPa.
The flat-neck welding flange is used for butt welding of flange and pipe. It has a reasonable structure, high strength and rigidity, can withstand high temperature and pressure, repeated bending and temperature fluctuations, and has reliable sealing. The flat-welded flange with neck with nominal pressure of 0.25～2.5MPa adopts concave and convex sealing surface. ANSI B16.5 150lb sq.in Slip On Flange is your good choice.