Weld neck flanges are circular components used to connect pipes, valves, and other equipment in various industrial applications. They feature a long neck that gradually tapers to the pipe, allowing for a smooth flow of fluids and reducing turbulence. This design also provides strength and stability, making them suitable for high-pressure and high-temperature environments. These flanges are typically made from materials like stainless steel, carbon steel, or alloys, depending on the specific requirements of the application. They are welded to the pipe, creating a strong, permanent connection that can withstand significant stress and pressure, ensuring the integrity of the piping system.