... 12mm OD:6mm-830mm. API 5L/ASTM A106 GR B carbon Seamless Steel Pipes.Description of product:Various sizes are avaialble Outer ... wooden cases Standard: GB, JIS, ASTM, AISI, DIN and more Material: ASTM A 179 A 53 A106, API5L Gr.B X60 X42, Q235B ... Usage: petroleum, chemical, power, gas, water, metallurgy, shipbuilding, construction and more Package: in bundles, varnish coating, ends can be beveled ...