UNS N08020 Pipe Fittings also have excellent mechanical properties, making them suitable for high-pressure and high-temperature applications. Alloy 20 pipe fittings are available in different types, including elbows, tees, reducers, caps, stub ends, and more, which makes them suitable for various piping applications. Elbows are used to change the direction of the piping system, while tees are used to join three pipes together. Reducers are used to reduce the pipe size, while caps are used to close the end of the pipe. Stub ends are combined with lap joint flanges to allow easy disassembly of the piping system.