1.API 5L/ASTM A106 GR B carbon Seamless Steel Pipes. 2.Standard: ASTMA511, A312, A269. 3.Length6m--12mm OD:6mm-830mm. API 5L/ASTM A106 GR B carbon Seamless Steel Pipes.Description of product:Various sizes are avaialble Outer diameter: 6 to 830mm Wall thickness: 1 to 100mm Package: seaworthy wooden cases Standard: GB, JIS, ASTM, AISI, DIN and more Material: ASTM A 179 A 53 A106, API5L Gr.B X60 X42 ...