Long Weld Neck Flange

Long Weld Neck Flange Definition:

Long weld neck flange(LWN flange) is also call integral flange,it means a welding neck flange has a very long neck.Commonly, the welding neck flange has a tapered neck and a bevel end which is going to butt welding with the matching pipe.But the long weld neck flange,has a straight short pipe as the neck of a long weld neck flange.

Dimensions of Long Weld Neck Flange:

The long weld neck flange should be butt welded with the pipes,it means the neck dimensions is same with the matching pipe,same diameter and wall thickness,commonly the long weld has a plain end,not a bevel end for welding.Except the neck, the LWN flange has a same dimensions with the welding neck flange.In addition,there are also the type LWN heavy barrel (HB) and the equal LWN barrel (E);they have a different shape and a thicker “Wall” which name is nozzle.

Sealing Face of the Long Weld Neck Flange:

The sealing face of the long weld neck flange is same with the weld neck flange,so it could be raised face(RF),flat face(FF) or ring type joint(RTJ),the long weld neck flange is suitable to be used for the high pressure application.

The long weld neck flange could be in many materials,carbon steel,alloy steel or stainless steel.Hebei Haihao Group can supply the long weld neck flange as per customers’ requirements.