Copper Nickel Socket Weld Flanges are a type of flange used in piping systems where a smooth bore and fluid flow are essential, and resistance to corrosion is a primary concern. These flanges are constructed from a copper-nickel alloy, typically containing varying proportions of copper and nickel, along with small amounts of other elements like iron and manganese.

Socket weld flanges are designed to be connected to pipes by inserting the pipe into the socket end of the flange and then fillet-welding the joint. This design offers good alignment, strength, and leak-proof connections, making them suitable for applications involving high pressures and temperatures.