Direct Square Forming Tube Mill

The molding unit uses electric adjustment to directly shape square and rectangular pipe, only the position of roll needs to be moved when changing product specifications.  

Products Details

High Efficiency

Line speed can be up to 120m/min.

Low Wastage

Low unit wastage and low production cost.

High Accuracy

Diameter error is only 0.5/100 of the pipe OD.


Our Company

Shijiazhuang Zhongtai Pipe Technology Development Co., Ltd.was established in 2000 locating in Shijiazhuang, the capital city of Hebei Province. The factory covers an area of 67,000 square meters. Our main products consist high frequency straight welded pipe production line, cold roll steel production line, multi-function cold roll steel/welded pipe production line, slitting line production line, stainless steel pipe mill, various pipe mill auxiliary equipment and rollers, etc.
Lean more...Compare to Round-to-Square (RS) forming technique, the Flexible Cold Forming (FCF) creates better outer edge and smaller inner arc for the cross section of the tube, and the brim is flatter with more regular outlook. With our new DSS-3 technique, only one set of rollers is needed for the entire mill with no need for any roller or spacer replacement, which achieves full-automatic adjustment for roller positions, significantly increasing production efficiency and reducing labor cost and risk of hazard.Steel pipe manufacturing process

Scrolling Up→ Uncoiling → Shear and Welding→ Accumulator→ Forming→ HF induction Welding→ External Burr Removing→ Cooling → Sizing→ Flying Saw → Run Out Table →Inspecting→ Packing→ Warehouse

Product Information

Our Certificate

Product Application

Specialized in Pipe Production Line

More than 23 years...

High Frequency (HF) longitudinal welded pipe production line / pipe making machine / tube mill / Direct square forming welded pipe is designed to produce square and rectangular tubes with a maximum wall thickness of 22.0mm and a production size range of 80x80mm-600x600mm.

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Square Pipe


Rectangular Tube

To ensure the angle control of forming R-angle, solving the problem of uneven R-angle in traditional direct square forming.Making it easier when changing rollers from the side of stands since the lower rollers do not need to be adjusted.

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