If you spend enough time on tube shop floors (guilty), you notice a pattern: uptime and weld stability beat fancy brochures every day. The High Frequency Welded Tube Making Machine has quietly evolved—solid-state HF inverters, smarter scarfing, and servo cutoffs are making real differences. And yes, customers talk; many say tool changeover and NDT integration now decide the purchase.
Coil loading → uncoiling → end-shear & welding → accumulator → forming stands → solid‑state HF induction weld → inside/outside scarfing → air/water cooling → sizing/straightening → eddy-current or UT testing → inkjet marking → flying cutoff → bundle/stack. Materials: low‑carbon steel, HSLA, galvanized, and sometimes ferritic stainless (real‑world results vary). Typical service life: ≈10–15 years for the mill base; roll tooling ≈6–18 months depending on grade and throughput.
| Tube OD range | ≈ 10–127 mm (3/8"–5") |
| Wall thickness | 0.5–5.0 mm (grade-dependent) |
| Line speed | 60–120 m/min (material/diameter affect actual) |
| HF power | 200–600 kW solid‑state inverter |
| Cutoff | Servo flying cold saw; length tolerance ≈ ±0.5–1.0 mm |
| NDT | Eddy current; optional ultrasonic/hydrostatic (per spec) |
| Standards | ASTM A513/A500, EN 10305, API 5L (as applicable) |
Automotive seat frames, HVAC conduits, furniture, racking, bicycle frames, scaffolding, general structural, and (with proper spec) line pipe. One plant manager told me they cut scrap from 2.1% to 1.2% after switching to a new High Frequency Welded Tube Making Machine with auto scarf monitoring—small change, big money.
| Vendor | HF source | Quick-change | Inline NDT | After‑sales | Notes |
|---|---|---|---|---|---|
| YINGYEE (Shijiazhuang, Hebei) | Solid‑state, 200–600 kW | Cassette stands | Eddy current; UT optional | Local + remote, spares in 72 h | Pairs well with their high‑speed cut‑to‑length line |
| Vendor X | Mixed legacy + solid‑state | Partial | Basic EC | Regional | Lower entry price; slower changeover |
| Vendor Y | High‑end solid‑state | Full quick‑change | EC + UT suite | Global premium | Great tech, higher capex |
• Southeast Asia furniture tube line: 76 m/min avg, ovality ≤0.8%, complaints dropped 40% after EC tuning.
• EU HVAC conduit line: changeover 55 min with cassette stands; OEE ≈ 88% over 6 months (seasonal spike included).
Flattening/flare tests, length tolerance checks, EC/UT as required, occasional hydro for API jobs. Typical targets: weld seam hardness within spec; burr height controlled; camber under 1 mm/m. Certifications commonly requested: ISO 9001, CE, and compliance with IEC 60204‑1 for electrical safety.
Vendor address (for reference): Room B1106, Zhongliang Plaza, No.345 Youyi North Street, Xinhua District, Shijiazhuang, Hebei.
If you also blank coil into sheets, check a high‑speed cut‑to‑length line for galvanized coils—a natural partner on the same floor. It keeps your upstream material flow steady so the High Frequency Welded Tube Making Machine doesn’t starve or overrun.
