A tee fitting with flange is a pipe fitting used to connect three pipe sections at a 90-degree angle, forming a T-shaped intersection, with flanged ends for secure, bolted connections. This setup allows for easy assembly, disassembly, and maintenance in piping systems, making it ideal for high-pressure or high-temperature applications. Tee fittings with flanges are commonly used in industries such as oil and gas, chemical processing, water treatment, and power plants. They come in various materials like carbon steel, stainless steel, or PVC, depending on the system's requirements.