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FFX HIGH-FREQUENCY LONGITUDINAL WELDED TUBE MILL
FFX Forming High-Frequency Longitudinal Welded Tube Mill
FFX is an advanced flexible forming process that divides the mill into breakdown and fin-forming sections. Fengqi has delivered a Ø165×8 mm FFX high-frequency longitudinal welded tube line to Malaysia.
Malaysia delivered project: Ø165×8 mm | line range: Ø89–Ø168 mm; wall 3–10 mm
Discuss your production range
PRODUCT OVERVIEW
Equipment description and reference data
FFX is an internationally advanced flexible forming process. It provides stable forming and convenient size changes. The mill is divided into breakdown-forming and fin-forming sections, and the rolls in the breakdown section can accommodate multiple tube sizes.
Delivered Project
A Ø165×8 mm FFX high-frequency longitudinal welded tube production line has been delivered to Malaysia. It uses advanced FFX flexible forming technology.
The breakdown-roll surfaces use an involute, multi-curvature profile, so the breakdown rolls do not need to be replaced within the designed range. The fin-forming and sizing sections use quick-change rigid stands, saving roll-change time.
The complete line uses PLC automatic control and inverter-regulated AC motors, providing high accuracy, stable performance and convenient adjustment.
Process Features
- Advanced FFX flexible forming technology.
- Improved forming accuracy. The PLC automatic control system helps maintain consistent and stable tube diameter, roundness, weld-seam position and forming quality while reducing manual adjustment errors.
- One set of breakdown rolls can produce every tube diameter within the designed range by servo-adjusting the roll positions. Compared with conventional roll forming, this can reduce roll requirements by 30%–60%.
- Less roll-changing and adjustment time improves production efficiency.
- Split rolls are used instead of one-piece rolls, reducing spare-parts inventory requirements and cost.
Production Process Flow
Uncoiling → strip joining → accumulation → FFX breakdown forming → fin-pass forming → high-frequency longitudinal welding → sizing → straightening → cut-off
Technical Parameters
- Round tube diameter
- Ø89–Ø168 mm
- Wall thickness
- 3–10 mm
- Maximum coil weight
- ≤10 t
- Forming speed
- 10–40 m/min
Applications
- Multi-size ERW tube production
- High-strength structural tube
- Projects requiring frequent size changes
- Medium- and heavy-wall pipe
The production line can be customized according to the intended use of the finished tube.
APPLICATIONS
What this line can produce
- Multi-size ERW tube production
- High-strength structural tube
- Projects requiring frequent size changes
- Medium- and heavy-wall pipe
CONFIGURATION FOCUS
Engineering features
- Advanced flexible FFX forming process
- PLC control for diameter, roundness and weld-seam consistency
- Servo-adjusted common breakdown rolls for the complete designed diameter range
- 30–60% potential reduction in breakdown-roll inventory
- Split-roll construction reduces spare-parts inventory
- Quick-change rigid fin-forming and sizing stands
TYPICAL PROCESS FLOW
A complete production sequence
Uncoiling → strip joining → accumulation → FFX breakdown forming → fin-pass forming → high-frequency longitudinal welding → sizing → straightening → cut-off
Final process flow and equipment scope are confirmed after the product range and quality requirements are reviewed.TECHNICAL FAQ
Common buyer questions
What is the main benefit of FFX forming?
The same breakdown-roll set can produce every diameter within the designed range, reducing roll changes, adjustment time and tooling investment.
Does FFX eliminate every roll change?
The breakdown section uses common rolls; fin-forming and sizing sections use quick-change stands matched to the finished tube.
Need a line matched to your product?
Send the size range, wall thickness, material grade, speed target, coil data and destination country.
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