ERW steel pipe/tube making machine
ERW steel pipe/tube making machine, the process is unwinding the steel coil and make the head and tail of the coil butt-welded in the strips preparation section. Then the strips fed into accumulator and pulled out of the accumulator at a constant speed passed through the mill.
Next, the strip is formed into an open tube in the forming mill. After that, it is welded to a straight welded tube by solid-state high-frequency welding method, then to removal of external burrs and water cooling. The plate in certain width after slitting line and stripping is unfolded and leveled. Then, they are sent into a forming machine. Used the roller, the plate is bent into pipe state. The edge of the steel plate is melted by making use of the proximity effect and skin effect of high-frequency current. Then, the plate is extruded and welded into the pipe by extruding roller. The straight seam welded pipe mill also is called ERW mill.
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