1)Sizes (O.D. x W.T): from 21.3 mm -- 914mm x 2m to 30m
2)Standard: ASTM A53, ASTM A106, GB/T8163, ASTM A106/A53/API 5L ,EN10216
3)Steel Grade: Gr.B,X42,X52,X60,X65,P195TR2,P235TR2,P265TR2
4)Surface: oiled or black painted to prevent rust
5)Marking: as per customer's requirement
