We have been specializing in the design, development, manufacturing, and supplying of ERW pipe making machine, precision pipe mill, slitting line, and more since 2000. For example, we have successfully developed Φ20-Φ660 high frequency straight welded pipe production line, LW100-LW2200 multi-functional cold rolled section steel / welded pipe production line, ZJ100-ZJ2200 slitting line, etc.