... .API 5L X70 PSL2 steel pipe . 2.OD:610mm-2820mm,WT:5mm-25mm,Length:6m-18m. 3.API&ISO certification. 1 ... 5L X70 PSL2 Oil steel pipeline . 2.OD:610mm-2820mm,WT:5mm-25mm,Length:6m-18m. 3.API&ISO certification.API ... steel pipe/ERW pipe/welded tube.2.OD:610mm-2820mm,WT:5mm-25mm,Length:6m-18m.3.API&ISO certification.API ...