Mechanical Connecting Part A valve flange is a circular mechanical component used to connect a valve to a pipe securely. Bolt Holes Around the Rim It has evenly spaced holes around its edge to insert bolts and nuts for tight fastening. Flat or Raised Surface The flange face (surface) may be flat or raised to hold a gasket for proper sealing. Made of Strong Materials Usually manufactured from durable materials like carbon steel, stainless steel, or cast iron to withstand pressure and temperature. Leak-Proof Joint Works together with a gasket placed between two flanges to prevent leakage of liquids or gases. Standardized Design Produced according to industrial standards such as those set by the American Society of Mechanical Engineers (ASME) to ensure compatibility and safety.