A flange is a mechanical component used to connect two parts, typically pipes or equipment, in a secure manner. It usually consists of a flat piece of metal with holes for bolts, allowing for easy assembly and disassembly. Flanges are essential in various industries, including plumbing, oil and gas, and manufacturing, as they help maintain pressure and prevent leaks. Flanges come in different types and sizes, such as weld neck, slip-on, and blind flanges, each designed for specific applications. The choice of flange depends on factors like the materials being joined, the pressure requirements, and the environment in which they will be used.