... Gas, Construction, Metallurgy, etc 8.Minimum Order Quantity: According to customers requirement 9.Lead Time:According customers requirement10.Quanlity: First ... Neck Flange:Welding Neck Flange are flanges that designed to be joined to a piping system by butt welding. the WN Flange ... stress applications. The neck, or hub, transmits stresses to the pipe, reducing stress concentrations at the base of ...