1.API 5L PSL2 steel pipe oil pipeline . 2.OD:610mm-2820mm,WT:5mm-25mm,Length:6m-18m. ... 3.API&ISO certification. 1.API 5L PSL2 Oil steel pipeline . 2.OD:610mm-2820mm,WT:5mm-25mm,Length:6m-18m ... , SS440, SS490, SPHD, SPHE API 5L PSL2 steel pipe oil pipeline .