A flange is a protruded ridge, lip or rim that serves various purposes in engineering and plumbing. Learn about different types of flanges, such as weld neck, slip-on, socket weld and blind, and the common standards for flange dimensions and pressure classes. Flange Type Summary Table Table Key: FF– flat face. RF–raised face. RTJ–ring type joint. Special Flange Types Various special flange types exist, these include the reducer, expander, long welding neck, nipoflange, weldoflange, and swivel flange designs. As special flange types are not common, they are not covered in this introductory material. Flange Types , Faces, and Surfaces - Explained! This video is part of our Piping Flange Fundamentals Video Course A pipe flange is a circular disc-shaped piping component that attaches to a pipe for blocking or connecting other components like valves, nozzles, special items, etc. Pipe flanges can be classified depending on pipe attachment, flange facing, pressure-temperature rating, and codes.
