Overview

Our FFX Direct Forming & Sizing Section ERW Pipe Mill serves as the core forming section of high-frequency welded pipe production lines, engineered to continuously roll and shape incoming steel strip into closed tubular profiles through sequential roll bending deformation. After tube forming, an HF induction welding unit joins the strip edges to form a seamless weld seam. The newly welded pipe then proceeds to the cooling section for controlled temperature reduction. Subsequently, the sizing stand precisely calibrates the pipe outer diameter to match your exact dimensional tolerance requirements. Complementary to the sizing mill, a set of Turks Head units is installed downstream to conduct meticulous dimensional trimming and preliminary straightening, ensuring consistent roundness, straightness and overall geometric precision of finished tubes.
Conventional Forming(W Forming)
Flexible Forming(FF/FFX)
Direct Forming(DFT)
Quick Change System
Layout
Forming→Feed in
↓
Break Down and Fin Pass
↓
Welding →Guiding→ Squeezing→ Weld part→External Scarfing
↓
Water Cooling
↓
Sizing
↓
Turks Head
Specifictions
| Model╲Spec. | Size(mm) | Thickness(mm) | Forming Method | Roll Quick Change |
| ZJ-GH32 | Φ10-32 | 1.1-2.25 | W | Roller changing trolley |
| ZJ-GH50 | Φ12-50 | 1.2-2.75 | W | Roller changing trolley |
| ZJ-GH76 | Φ32-76 | 1.5-3.5 | W | Rafted System |
| ZJ-GH89 | Φ32-89 | 1.5-3.75 | W | Rafted System |
| ZJ-GH114 | Φ40-114 | 1.5-4.0 | W | Rafted System |
| ZJ-GH140 | Φ48-140 | 1.5-5.0 | W | Rafted System |
| ZJ-GH165 | Φ76-165 | 1.8-6.0 | W/DFT | Rafted System |
| ZJ-GH219 | Φ89-219 | 2.0-8.0 | FF/DFT | Shaft Assembly |
| ZJ-GH273 | Φ114-273 | 3.0-10.0 | FF/DFT | Shaft Assembly |
| ZJ-GH325 | Φ165-325 | 5.0-14.0 | FF/DFT | Shaft Assembly |
| ZJ-GH355 | Φ165-355 | 5.0-15.0 | FFX/DFT | Shaft Assembly |
| ZJ-GH406 | Φ219-406 | 6.0-16.0 | FFX/DFT | Shaft Assembly |
| ZJ-GH457 | Φ219-457 | 6.0-18.0 | FFX/DFT | Shaft Assembly |
| ZJ-GH508 | Φ273-508 | 6.0-20.0 | FFX/DFT | Shaft Assembly |
| ZJ-GH610 | Φ273-610 | 6.0-21.0 | FFX/DFT | Shaft Assembly |
| ZJ-GH660 | Φ325-630 | 6.0-22.0 | FFX/DFT | Shaft Assembly |
| ZJ-GH711 | Φ325-760 | 8.0-22.0 | FFX/DFT | Shaft Assembly |