ASTM A106/A53/API 5L Seamless Carbon Steel Pipe/seamless pipe/seamless steel pipe/steel pipe 1)Sizes (O.D. x W.T): from 13.7mm -- 609.6mm x 2m to 16m 2)Standard: ASTM A53, ASTM A106, GB/T8163, ASTM A106/A53/API 5L 3)Steel Grade: Gr.B,X42,X52,X60,X65,X70 4)Surface: oiled or black painted to prevent rust 5)Marking: as per customer's requirement Inner packing: Caps on two ends of every pipe Outer packing: Hexagonal shape bundles wrapped with strong steel trip or according to customers'requests.