Copper Nickel Weld Neck Flanges attach by welding the pipe to the neck of the flange. This transfers stress from the flange to the pipe instead. It also reduces the stress concentration from the base of the hub. Weld neck flanges are often used for applications where high pressure is a factor. The inside diameter of the flange is designed to match the pipe’s inside diameter. Weld Neck Pipe flanges with a hub have published specifications that range from 1/2″ thru 24″.

Copper nickel weld neck flanges are a type of flange used in piping systems, particularly in industries where resistance to corrosion is crucial, such as in marine environments or in applications involving seawater. These flanges are made from a copper-nickel alloy, typically containing varying percentages of copper and nickel along with small amounts of other elements like iron and manganese.