forging flange material test key point:chemical composition test:NDT steel forged, cast flange can be provided Standard:ANSI Forging flange, and cast flange can be provided as per buyer's requirement.Material: alloy steel, stainless steel, carbon steel and special steelType:Plate flange, blind flange, reducing flange, thread flange, ring, orifice flange, welding neck ring type flange and etc. ...