ERW steelpipe,also use cold drawn technique. Produced by shining strip ... ) With Oiled5) 3 PE, FBE, corrosion resistant coatingTechniqueElectronic Resistance Welded (ERW )Cole drawnTypeWeldedWelded Line TypeLongitudinalSection ShapeRound , square,rectangularInspectionWith Hydraulic Testing, Eddy ... , Western UnionOthersFitting as screws and flange also can be supplied. ERW thin-walled steel pipe