What’s long weld neck flange (LWN)?

A long neck flange (LWN) and a welding neck flange have similar features, however, a long neck flange has a slightly longer neck. Long neck flanges on columns and barrels are used as nozzles in many industrial businesses. Equal LWN barrels and heavy barrels are also popular, which have a thicker wall and a unique shape.

Long weld neck flange drawing

A long weld neck flange (LWN) offers a lighter connection. This is why many industries use this flange in areas that require minimum reinforcement. A long weld neck flange has a barrel that provides proper clearance between the nut and neck. The length of the flange can be increased if an offset attachment is needed on the heads or vessel shells. These flanges can also be manufactured with contoured bottoms.

Long neck flanges (LWN) are used by many industries because they are strong and resist dishing. The tapered hub provides strength since it is extremely thick. The hub runs from the flange facing to the weld joint.

Long weld neck flanges

Hebei Haihao Group can manufacture long neck flanges (LWN) with good quality. Recently we just finished an order of long neck flanges (LWN). This order is from Pakistan customer, which has two sizes with different long neck. The material is SA-105N with class 900.

If you have demand for long neck flanges (LWN), please don’t hesitate to contact us!Email:sales@haihaogroup.com