... steel, alloy steel 2)Standard: ANSI, ASME, JIS, DIN 3)Size: 1/2"-5, 000mm name:flange1) Flange varieties: Plate, slip-on ... , alloy steel3) Standard: ANSI, ASME, JIS, DIN4) Size: 1/2"-5, 000mm5) Surface treatment: Transparent oil, rust-proof oil, hot galvanizing ...