The ERW pipe production line is one kind of automatic kwelding pipes manufacturing equipment,which send the steel plate to its forming machine after the slitted coil is decoilde and leveled,and then bend the steel plate into steel pipe with roller ,and at last melt the steel strip and squeeze them into circular pipe under kinred effect and skin effect of high frequency current.

According to differtent usages, the longitudinal welded pipe production line could be divided into two types:the API type and the national standard type.

The API type is mainly used for manufacturing high-class steel pipes such as natural gas conveying and oil well pipe, which is strict in the quality of the steel pipes .This line iclude many manufacturing facility and testing equipments such as medium-frequency annealing settings, air-cooling roller bed,ultrasonic test machine ,high pressure hydrostatic test machine ,sizing machine and so on .The national type is mainly used in producing water gas pipeline ,structrual pipeline and so on.