What Is Flange?

A flange is a protruded ridge, lip, or rim, either external or internal, that serves to increase strength, stabilize and guide the movements of a machine or its parts, or for easy attachment/transfer of contact force with another object. Flanges can be used to connect pipes with each other, to valves, to fittings, and to specialty items such as strainers and pressure vessels. A flange can also be a plate or ring to form a rim at the end of a pipe when fastened to the pipe, which is known as a closet flange. A blind flange is a plate for covering or closing the end of a pipe. Flanges are joined by bolting, and sealing is often completed with the use of gaskets or other methods. Flanges can be defined as an important element used to connect pipes, valves, pumps, and other equipment together. They are one of the safety systems used to connect piping systems to various equipment. Flanges are usually welded or screwed, and flanged joints are made by bolting together two flanges with a gasket between them to provide a seal. Flanges can be made of different materials such as brass, copper, iron, stainless steel, cast iron, aluminum, bronze, plastic, etc. Flanges are manufactured in all different materials, but the most commonly used material is forged carbon steel, and they have machined surfaces.

What Are the Manufacturing Processes for Flanges?

Flanges can be manufactured using a variety of techniques, including casting, cutting (CNC machining), rolling and forging. Flange processing methods for different uses are also different. The flanges shown here are all cut and processed by CNC machines.
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