name: steel pipe material: carbon steel A234 WPB ANSI B16.9 standard: ASTM, ASME, GB, JIS,DIN, BS ISO9001/9002 ASTM A106/A53 Gr.B Seamless Carbon Steel Pipe OD 21.3-1220mm (1/2”-48”)WT2.11-59.54 (sch10s-XXS)Length6-12m (Fixed or Random)Surface TreatmentLight varnish, black oilStandardAPI,ASTM ANSI,ASME,GB,DIN,BS Grade10#,20#,45#,A53,A106,A312Surface treatmentblack rust-proof oil, transparent oil, ...