10 Steps to Specify an ERW Tube Mill: Tube Size to Full Line
Choose the mill model from your maximum OD and wall thickness, then use strip, material, coil, speed, cutting, power and site data to define the full line.
Read articleHigh-frequency tube mill line
YJ-114 high-frequency tube mill, for medium-to-large diameter, heavier-wall round, square and rectangular tube.
All 12 models at one scale (largest round OD)
Drawn to scale · OD, wall and speed are separate ranges, not simultaneous limits; actual capability depends on material and final configuration.
YJ-114 is for medium-to-large diameter, heavier-wall round, square and rectangular tube. Its diameter, wall thickness and speed range is in the specification list and model comparison table below. It covers larger diameters and thicker walls than YJ-89; for larger diameters, compare YJ-127 and the models above it.
A complete line consists of the uncoiler, leveler, shear and butt welder, spiral accumulator, forming and sizing mill, high-frequency welder, flying saw and run-out table, with rollers tooled for the product. Round, square and rectangular tube are made on the same mill by changing rollers. For thin-wall products slightly beyond this model's range, a widened mill can be discussed.
Please tell us the material, tube shape, size and wall thickness range, target speed and cut length, and whether you are building a new line or replacing existing equipment. If you have not chosen a model, describe the product and we will recommend one.
The uncoiler, leveler, shear & butt welder and spiral accumulator are matched to the strip material, width and thickness and the line speed, and the uncoiler also to the coil weight and diameters; the configuration is set per project.
Enter a target OD to see which models cover it. Neighbouring ranges overlap, so wall, material and output also decide the choice.
Size, wall thickness and speed are not independent combinations. Actual capability depends on material, finished-product requirements and the final equipment configuration.
| Model | Round tube OD mm | Wall mm | Square tube mm | Wall mm | Rectangular tube mm | Wall mm | Line speed m/min |
|---|---|---|---|---|---|---|---|
| YJ-20 | Φ10–25.4 | 0.4–1.5 | 8×8–20×20 | 0.4–1.0 | 10×6–25×15 | 0.4–1.0 | 0–100 |
| YJ-32 | Φ12.7–38.1 | 0.4–2.0 | 10×10–30×30 | 0.4–1.5 | 12×8–40×20 | 0.4–1.5 | 0–120 |
| YJ-50 | Φ19.1–63.5 | 0.6–3.0 | 15×15–50×50 | 0.6–2.5 | 20×10–60×40 | 0.6–2.5 | 0–100 |
| YJ-76 | Φ38.1–89 | 0.8–3.5 | 30×30–70×70 | 0.8–3.0 | 40×20–80×60 | 0.8–3.0 | 0–80 |
| YJ-89 | Φ50–102 | 1.0–4.0 | 40×40–80×80 | 1.0–3.5 | 50×30–90×70 | 1.0–3.5 | 0–70 |
| YJ-102 | Φ50–114 | 1.2–4.5 | 40×40–90×90 | 1.2–4.0 | 50×30–100×80 | 1.2–4.0 | 0–70 |
| YJ-114 | Φ63.5–127 | 1.5–5.0 | 50×50–100×100 | 1.5–4.2 | 60×40–120×80 | 1.5–4.2 | 0–60 |
| YJ-127 | Φ63.5–140 | 1.5–5.0 | 50×50–110×110 | 1.5–4.5 | 60×40–130×90 | 1.5–4.5 | 0–60 |
| YJ-165 | Φ76–165 | 1.5–6.0 | 60×60–130×130 | 1.5–5.0 | 70×50–150×110 | 1.5–5.0 | 0–50 |
| YJ-219 | Φ89–219 | 2.0–8.0 | 70×70–170×170 | 2.0–7.0 | 80×60–190×150 | 2.0–7.0 | 0–50 |
| YJ-254 | Φ114–254 | 3.0–9.0 | 90×90–200×200 | 3.0–7.5 | 100×80–250×150 | 3.0–7.5 | 0–40 |
| YJ-273 | Φ140–273 | 4.0–10.0 | 110×110–215×215 | 4.0–8.5 | 130×90–250×180 | 4.0–8.5 | 0–30 |
Square and rectangular sizes are side-length ranges. Size, wall thickness and speed are not independent combinations; actual capability depends on the material and final configuration.
Further standard and custom models are available on request.
Source: company product catalogue (April 2025 edition), page 12.
We discuss the suitable model and configuration for your product and plant. Every line is configured per project, and pricing follows the configuration.