API 5L /ASTM A106 GR.B Carbon Steel Pipe Standard:API 5L,ASTM A106/A53, ... supply high quality SEAMLESS STEEL PIPES API 5L/ ASTM A106, GR.BStandardASTM A106/ASTM A 53 API 5L,GB/T8163-1999 ... , JIS 3461/3462, BS3059,BS1387 etc Material: Gr A, Gr B, X42, X52, X60,X80,10#,20#,35#,45#,ST35.4,ST37.4 ...