Forged flange (flange) is also called flange or flange.

Forged flanges are invented on the basis of cast steel flanges, and their strength is much higher than that of cast steel flanges. The forged flange is a part that connects the pipe to the pipe and is connected to the pipe end. There are holes on the forged flanges, and bolts make the two flanges tightly connected. The forged flanges are sealed with gaskets. Flanged pipe fittings (flanged pipe fittings) refer to pipe fittings with forged flanges (lugs or sockets). It can be made by casting (not shown in the picture), or it can be formed by threaded connection or welding. The flange connection (flange, joint) 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 the nut is tightened, 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. According to the structure type, there are integral flanges, loop flanges and threaded flanges. Common integral flanges are flat welding flanges and butt welding flanges. Flat-welded forged flanges have poor rigidity and are suitable for occasions with pressure p≤4MPa; butt-welded flanges, also known as high neck flanges, have greater rigidity and are suitable for occasions with higher pressure and temperature. Forged flanges are divided into threaded (wired) flanges and welded flanges. Low-pressure small-diameter wire flanges, high-pressure and low-pressure large-diameters both use welded flanges. The thickness of flanges and the diameter and number of connecting bolts are different for different pressures. Implementation standards include national standards, chemical standards, mechanical standards, power standards, marine standards, etc.