Pls be informed that we are manufactuer for various kinds Flanges ( Slip on Flange, Plate Flange, Welding Neck Flange, Blind Flange, Socket weld flange, Anchour Flange, Orifice Flange, etc. ) as per standards of ANSI, BS, DIN, EN, JIS, GOST, AS, etc, and as per Clients' drawing. The material can be Carbon steel , Stainless Steel, Alloy Steel, Alumium and Copper , the outside coating can be yellow painting, black painting, blue painting, FEB, Galvanization, etc. Welcoming your detailed inquiry! Thanks!