... ERW pipes, seamless steel pipes,elbow,reducer,tee,caps,flange,tube etc...1. Butt weld Elbow 45degree & 90degree ... 2D 3D, 4D, 5D etc.6.All kinds of Flanges, welding neck , slip on , socket weld , threaded, lap joint ... , blind, spectacle, orifice, ring and long welding neck flanges.SIZE: 1/2 inch-72 inchWALL THICKNESS: SCH ... happy to give you details. BS stainless steel Welding Neck Flange