ZTF(FFX) Flexible Forming Tube Mill

ZTF is a forming technique developed by ZTZG in 2005 based on improvements on Japan FFX forming. It allows the shared-usage of rollers during break-down section when forming pipe, saving significant mold and labor cost while greatly improving production efficiency.  

Products Details

For ZTF, we divide forming section into breakdown section and fin-pass section. ZTF technology is used in breakdown section. Only one set of roller is needed to produce all round pipe within the range (weigh around 60% of the entire mill rollers). When producing different sized pipe, only change rollers during fin pass section & sizing section, therefore saving significant roller cost and increase productivity. The latest generation ZTF technique(ZTF4) allows fully automatic adjustment of roller position during break-down section with minimum to none need of manual adjustment, significantly improve productivity while reducing labor maintenance cost and risk of hazard. The control system utilizes close-loop servo control to assure the accuracy and stability of roller positions.

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...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 is designed to produce welded pipes of 114mm to 820mm in OD and with a maximum wall thickness of 22mm, as well as corresponding square and rectangular pipe.

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Round Pipe


Square Pipe


Rectangular Tube


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