The definition of ERW steel pipe

The definition of high frequency straight seam welded pipe(ERW steel pipe) Resistance welded steel pipe is collectively referred to as ERW, and ERW are respectively corresponding to the first letter of the English word-Electric Resistance Welding.Resistance welding steel pipe can be divided into two forms ac welding steel pipe and dc welding steel pipe.Ac welding according to the different frequency is divided into low frequency, intermediate frequency brazing, intermediate frequency and high frequency welding.High frequency welding is mainly used for the production of thin wall or ordinary wall thickness steel pipe,and high frequency welding is divided into contact welding and induction welding.While Dc welding is commonly used in small diameter steel pipe.Therefore, in general, the high frequency welded pipe is contained in ERW welded pipe,and is a kind of high frequency welding process production ERW welded pipe.ERW straight welded pipe is a relatively economic steel pipe with advanced product performance and leading quality  in the field of oil and gas storage and transportation.