... :Various from 2.5mm to 60mmMaterial: ASTM A53, ASTM A106,,10#, 20#, 45#, 16Mn, A25,A25P,A,B,X42,X46, X52 ... . Such as seamless steel pipe, welded pipe, galvanized pipe, square tube, ERW pipe and fittings, please feel free to contact us. API 5L/5CT ASTM A106 GR ... .B/A53 GR.B Seamless Steel Pipe ...