Copper Nickel Composite Weld Neck Flanges Copper nickel composite weld neck flange is made of inner flange , also called collar & backing flange (loose flange).The collar is welded with copper nickel pipes , the backing flange can be active. Collar is the sealing surface, the role of the backing flange is to press them. Because of collar is blocked, backing flange does not contact with the media. This flange connections are applied, in low-pressure and non critical applications, and is a cheap method of flanging , normally used in shipment.

Composite Weld Neck flanges are comsited with copper nickel inner flange ( also called as copper nickel collar, copper nickel stub end ) and carbon steel outer flanges.Composite weld neck flanges are normally used on shipbuilding. Because it’s good ability of anti anticorrosion and cheap price.With shihang own forging flange manufacturer, CNC flanges workshop, Shihang can supply copper nickel flange with good quality, reasonable price and fast delivery. Shihang copper nickel flanges are mainly used in shipbuilding, marine, offshore oil platform.