Forged Long Weld Neck Flanges supplies
Long neck flange (LWN) : long neck flange is actually an extension of the neck butt welding flange. Flange neck slightly straight tube, the neck height is 229mm(≤DN100) or 305mm(> DN100). Flange neck shall not be processed with groove, and groove processing shall be determined through consultation with the user according to relevant requirements of B16.5 relevant standards.
