Material: Carbon Steel Standard: ANSI,DIN,JIS,BS,UNI,AS Place of Origin: cangzhou China (Mainland) Flange TypeflangeMaterial:CarbonSteelA234,ST35.8,ST37 A105 ... , A106B, alloy steelStandard:ASME,ASTM,ANSI,DIN,GB,B16.9 ... ,water conservancy,boiler,machinery,sanitary construction etc. forged carbon steel blind flange