- U-tube welding equipment
It adopts a fully enclosed design, which is more conducive to ensuring welding quality, and supports customization of torch heads for various tube center distances.
With a water-cooling design, it features a high duty cycle and ensures stable and reliable operation during long‑term continuous work.
The dual‑gas circuit design guarantees the surface appearance and quality of the weld bead.
The straight section of the U‑tube is clamped by cylinders and profiling fixtures, making torch clamping more reliable and efficient.
The overall torch is made of special materials, lightweight and with one‑button operation for easy use.
Built‑in expert parameters: simply input the pipe diameter and wall thickness, and welding parameters will be generated automatically.
Performance Features
• Lightweight, one‑button operation, easy to learn and use.
• Dual‑gas circuit design for easy control of weld bead appearance and quality.
• Cylinder and profiling clamping for more reliable and fast clamping.
• Compact torch head for operation in dense tube bundles or inside heat exchangers.
• Water‑cooling design for all‑day operation.
• Wire‑free fusion welding.
• Supports customization of torch heads for various tube center distances.
| Model | XNLU-16A | XNLU-21A | XNLU-25A | XNLU-12DA |
|---|---|---|---|---|
| Applicable Pipe Diameter | Φ12.7-16.0 | Φ19.0-21.0 | Φ22.0-25.0 | Φ12.7 |
| Docking wall thickness | ≤1.3 | |||
| Insertion wall thickness | ≤1.6 | |||
| Shielding gas | Argon | |||
| Cooling method | Circulating water cooling | |||
| Tungsten electrode specifications | 1.6 | |||
| Welding gun weight | 3.0 | 3.5 | 4.5 | 3.0 |












