1) Steel grade: ST37-2, S235JR,Q235A/B, Q345B, Q390B, SS400 2) Size: 33.5-508mm (1''-20'') x 2.0-16mm 3) Standard: GB/T13793-1 ERW Steel pipe Detailed Product Description 1) Steel grade: ST37-2, S235JR,Q235A/B, Q345B, Q390B, SS4002) Size: 33.5-508mm (1''-20'') x 2.0-16mm3) Standard: GB/T13793-1992;ASTM A53, JISG, DIN1626/2-24584) Supply ability: 20,000MT/month5) Marking: as per customers' ...