ASME 16.5 Flange

A typical class of pipe fittings that is widely utilized is pipe flanges. Two pipes are mechanically joined together using a flange. Additionally, it can be used to mechanically connect a pipe to any other type of fitting, including a valve, tee, choke, or other. There are square, round, and rectangular flanges available. When attached to a pipe, some models' flanges typically take the shape of a ring or a plate to create a rim at the pipe's end (an illustration of the closet flange)

A flange can also function as a cap to seal or enclose a pipe's termination (an illustration of the blind flange).

Therefore, a flange is meant to be an interior or protruding part that supports mechanical parts. They resemble frameworks used to support the mechanical component or join it to another component.