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 ... : 5.8, 6, 12m or customized Usage: petroleum, chemical, power, gas, water, metallurgy, shipbuilding, construction and more Package: in bundles, varnish ...