A pipe flange is a mechanical component used to connect two sections of pipe or to attach a pipe to other equipment, such as valves or pumps. It typically features a flat surface with holes for bolts, allowing for a secure and leak-proof joint. Flanges come in various materials, including steel, plastic, and cast iron, and are designed to withstand different pressures and temperatures. Flanges are categorized into several types, such as weld neck, slip-on, and blind flanges, each serving specific applications. They are essential in various industries, including oil and gas, water treatment, and chemical processing, ensuring safe and efficient fluid transport.