Welded STEEL PIPE ERW STEEL PIPE
                
                
                    Electric Resistance Welded (ERW) pipe is manufactured by cold forming a flat steel strip into a rounded tube and 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 form a bond. The longitudinal ERW seam does not require filler metal.
                
            
         
                     
                         
                         
                         
                        




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