Shiv Shakti Forge is the Manufacturer, Supplier, and Exporter of ASME 16.5 Long Weld Neck Flanges. It is, also called LWN flanges, are similar to standard weld neck flanges but the neck is considerably longer. The LWN designation refers to weld neck flanges that are longer than typical weld neck flanges and have an extended neck that serves as a boring extension. Because they feature a long tapered hub that gets smaller as it moves from the pipe to the fitting, welded neck flanges are simple to spot. Industrial operations involving high pressure and high temperatures both use LWN.