The plate welded flange, also known as the flat flange, is a common pipeline fitting typically made by cutting steel plates. It is mainly used to connect pipes, valves, equipment, and other components, ensuring sealing and stability. It is widely applied in industries such as petroleum, chemical, power, and shipbuilding.
Plate Welded Flange
Also known as the flat flange, it is a common pipeline fitting typically made by cutting steel plates, shaped as a circle with a hole in the center for the pipe to pass through. The edge has bolt holes for securing it. It is mainly used to connect pipes, valves, equipment, and other components, ensuring sealing and stability. It is widely applied in industries such as petroleum, chemical, power, and shipbuilding.
It can be made from materials such as 10#, 20# carbon steel, 16MnR, 12Cr1MoV alloy steel, and ASTM A403, 1Cr18Ni9Ti stainless steel. The pressure range follows international system standards, including PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, and PN100 (MPa). The product size ranges from DN10 to DN2000 (mm). Depending on actual needs, sealing face types may include flat (FF/A type), raised face (RF/B type), etc.
The plate welded flange is an ideal choice for low-pressure, normal-temperature pipeline systems. With its low cost, lightweight, and ease of installation, it plays an important role in medium and low-pressure pipeline systems. In scenarios where pressure fluctuation is small and sealing requirements are not extremely high, it meets pipeline connection and sealing needs well and is an economical and practical choice in pipeline engineering.
