ERW pipe

Our ERW pipes production line range is OD 17.1mm--660mm, wall thickness 0.6mm--25.4mm. The annual capacity is 150 thousand tons. ERW pipe (Electric Resistance Welded pipe) is manufactured by cold forming a flat steel strip into a rounded tube by passing it through a series of forming rollers to obtain a longitudinal seam. The two edges are then simultaneously heated with a high frequency current and squeezed together to produce a bond. The longitudinal ERW seam does not require filler metal while impurities in the heat affected zone are extruded during the welding process.