What is a Pipe Flange
A pipe flange functions as a joining mechanism to connect a system of pipes or tubing to various equipment and valves. Typically, two flanges are joined by bolts using a gasket between them for a seal leaving the opposite ends open for welding connections (Figure one). Flanges offer numerous advantages for joining pipe in highly corrosive or maintenance prone facilities. For instance, pipe systems that need to be regularly inspected or are prone to repair can be joined with flanges for quick disassembly. Flanged connections also allow for modifications to be made to the system without needing major fabrication.
To allow easy functionality and interchangeability, flanges are designed to have standardized dimensions. Common world standards include ASA/ASME (USA), PN/DIN (European), BS10 (British/Australian), and JIS/KS (Japanese/Korean).