If you're evaluating a high frequency welded tube making machine, you’re probably juggling specs, uptime promises, and real‑world feedback. I’ve toured more than a few mills; the best setups feel calm at speed—no chatter, no mystery downtime, just a smooth coil-to-bundle rhythm. Let’s unpack what matters now, not five brochures ago.
Demand is moving toward thinner gauges with higher line speeds, better inline NDT, and faster size changes. In fact, a lot of shops now ask for recipe-driven setups and remote diagnostics. Sustainability is creeping in too—energy-efficient solid-state HF welders and heat recovery on scarfing dust extraction are no longer “nice-to-haves.”
| Tube OD range | ≈10–76 mm (other ranges available) |
| Wall thickness | 0.3–3.0 mm (real-world use may vary by grade) |
| Line speed | Up to ≈120 m/min for thin gauges |
| HF welder power | ≈100–400 kW solid-state |
| Cut length accuracy | ±0.5 mm per 3 m (with servo flying saw) |
| Straightness / ovality | ≤1.5 mm/m; ≤0.8% OD (typical targets) |
| Related line (sheet prep) | Cut-to-length: 0.3–3.0 mm, width ≤1500 mm, min length 500 mm; conveyor length customizable |
Quick aside: many customers pair a high frequency welded tube making machine with a high-speed cut-to-length line to prep open plates for fixtures or downstream stamping. It’s not mandatory, but it simplifies flow in mixed-product shops.
| Vendor | Notable strengths | HF range | Certs |
|---|---|---|---|
| YingYee Machinery, Shijiazhuang, Hebei (Room B1106, Zhongliang Plaza, No.345 Youyi North St., Xinhua District) | Pragmatic customization; competitive pricing; responsive remote support | ≈100–400 kW | ISO 9001, CE (project-dependent) |
| Thermatool | Advanced HF power supplies; strong process control | ≈100–800 kW | CE, UL where applicable |
| T&H Lemont | Robust mills; tooling expertise | Project-specific | ISO 9001 |
| Yoder | High-end automation; repeatable changeovers | Project-specific | CE, ISO (varies) |
A furniture tube plant switched to a high frequency welded tube making machine with 250 kW HF. Line speed rose from 70 to 105 m/min on 0.9 mm low‑carbon steel. Eddy current reject rate dropped from 2.1% to 0.6% after better edge prep and impeder cooling. Typical production QA: tensile per ASTM A370 passed with weld tensile at ≈95–100% of base metal; ovality held at 0.6% OD; burr height ≤0.03 mm post-scarfing.
For shops feeding multiple cells, a high-speed cut-to-length line helps—0.3–3.0 mm thickness, up to 1500 mm width, minimum cut 500 mm; longest conveyor customizable. It’s simple, but the uptime math is persuasive.
Look for CE marking, ISO 9001 quality systems, and electrical safety in line with IEC 60204‑1. For stainless mechanical tubing, EN 10296‑2 is a good anchor; for carbon steel, ASTM A513/A500 and the relevant NDT standards keep everyone honest.
Don’t buy on kW alone. Watch the weld bead and scarfing consistency at speed, verify SPC data, and ask for a week of logged utilities. It sounds basic, but surprisingly, it separates great mills from merely okay ones.
