... 1 to 6 Alloy Steel: ASTM A 335, GR P1, P2, P5, P9, P11, P22, P91 Types : RoundSize : Seamless: 1/4” ... as trigger factor of our success. Our Carbon steel, Stainless Steel, Alloy Steel Pipe and pipe fittings, flanges are mainly used in petroleum, ... coupling, outlet etc supplying.AS CS SS Pipe, fittings, flangesMaterial: Carbon steel, stainless steel, Alloy steel. Standard: ANSI ASTM DIN JIS GBSize: Up ...