It is designed to roll steel strips to produce continuously to longitudinal welding steel tube, which is used to produce structure round ,square and rectangular tube, profile tube. Technical Procedures Coil loadingUncoilingShearing & WeldingAccumulatingFormingHF weldingOuter de-burringSeam polishingwater coolingFine sizingTurk straighteningFlying cut offRun out tablePackagingstoring.