Duplex steel pipe fittings are widely used in various industries due to their high strength, corrosion resistance, and excellent weldability. Here are some common types of duplex steel pipe fittings:

Elbows: Duplex steel elbows are used to change the direction of the flow of fluids in pipelines.

Tees: Duplex steel tees are used to combine or split the flow of fluids in pipelines.

Reducers: Duplex steel reducers are used to connect pipes of different sizes and maintain a uniform flow of fluids.

Flanges: Duplex steel flanges are used to connect pipes or valves to other equipment, such as pumps, heat exchangers, and tanks.

Couplings: Duplex steel couplings are used to connect two pipes of the same size and maintain the strength and integrity of the pipeline.

Caps: Duplex steel caps are used to seal the ends of pipes and prevent the leakage of fluids.

Stub Ends: Duplex steel stub ends are used in combination with lap joint flanges to create a flanged connection that allows for easy assembly and disassembly.

Crosses: Duplex steel crosses are used to connect four pipes of equal or different sizes at right angles to each other.

These are some of the most common types of duplex steel pipe fittings used in various industrial applications.