Copper Nickel Threaded Flanges are a type of flange used in piping systems where a threaded connection is preferred over welding. These flanges are made from copper-nickel alloys, which typically consist of varying proportions of copper and nickel, along with small amounts of other elements such as iron and manganese.

Copper nickel threaded flanges offer excellent resistance to corrosion, particularly in marine environments or in applications involving seawater, making them suitable for industries such as shipbuilding, offshore installations, and desalination plants.