1) Sizes (OD*WT): 108-426*4-31mm 2) Standards: GB/T8163, ASTM A53, ASTM A106, API5L, DIN17175 3) Grade: B 4) Surface: Varnish or black painted to prevent rust 5) Marking: As per customer's requirements 6) Application: Structure steel pipe, piling pipe, Sewage and clear water transportation. Line pipe for petroleum
