1) Sizes (OD*WT): 245mm x 6mm to 426mm x 31mm 2) Standards: ASTM A106, API5L, GB/T8162, GB/T8163 3) Grade: B 4) Surface: Varnish or black painted to prevent rust 5) Marking: As per customer's requirements 6) Application: Structure steel pipe, Boiler pipe, Line pipe for petroleum and so on
