carbon steel flange 1. size: 1/2"-48" 2.w.t.: SCH10-SCH160,SGP,STD,XS,XXS, 3.material : ASTM A234 WPB , DIN , JIS,etc 1) Carbon steel flange and alloy steel flange2) Standard: ASME, ANSI, JIS, DIN 3) Material: Q235,20#,alloy steel4) Surface treatment: transparent oil, rust-proof oil, hot galvanizing 5) Price: very competitive6) Special design available carbon steel flange