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In the world of steel tube and pipe manufacturing, the HF Welder (High-Frequency Welder) is the core component that determines welding quality, production efficiency, and pipe durability. As industries demand faster production and higher accuracy, HF welding technology has become essential for ERW tube mills, pipe mills, and roll forming lines.
Leading this innovation is Shijiazhuang FAITH Machinery Co., Ltd., a trusted name in the design and supply of high-frequency welders and complete tube mill systems.
An HF Welder (High-Frequency Welder) is an advanced welding system used to join the edges of formed steel strips into continuous pipes. It operates on the principle of electrical resistance heating, where high-frequency current generates localized heat at the weld seam, allowing the edges to fuse under pressure.
HF Welders are mainly categorized into two types:
Solid-State HF Welder – Uses transistors (IGBT/MOSFET) for higher efficiency, reliability, and energy savings.
Vacuum Tube HF Welder – A traditional type used in older systems, suitable for lower-speed operations.
Modern tube mills overwhelmingly use solid-state HF welders for their stable performance, low power consumption, and long service life.
In a tube mill line, the HF welder is positioned right after the forming section. Here’s how the process works:
Steel strip is formed into a tubular shape.
The HF welder generates electromagnetic current that heats the strip edges.
Pressure rolls forge the edges together, forming a continuous weld seam.
The welded pipe then passes through cooling, sizing, and straightening units.
This process ensures strong, consistent, and visually seamless welds, making HF welders essential in ERW (Electric Resistance Welding) tube production.
High-frequency welding offers several advantages over conventional methods:
High speed and productivity — ideal for mass production of steel pipes.
Clean and uniform welds — with minimal oxidation or distortion.
Energy-efficient operation — especially with solid-state technology.
Low maintenance requirements — thanks to fewer moving parts.
Compact design — easily integrated into existing tube mill systems.
These benefits make HF welders the preferred choice for steel, aluminum, and stainless steel tube production.
The following companies lead the global market in high-frequency welding technology:
Shijiazhuang FAITH Machinery Co., Ltd. (China) – Manufacturer of high-frequency welders integrated with ERW tube mills and roll forming lines.
Thermatool (USA) – Global pioneer in solid-state HF welding systems.
EFD Induction (Norway) – Specialist in induction heating and HF welding equipment.
Radyne (USA) – Offers custom HF welding and heating solutions.
MTM Group (Italy) – Known for integrated HF welding systems in tube mills.
Fives OTO (Italy) – High-efficiency welders for advanced pipe production.
R.F. Systems (Germany) – Supplier of solid-state HF generators for pipe and cable manufacturing.
Kusakabe (Japan) – Focused on precision HF welding and forming technologies.
Hangzhou Roll Forming Technology (China) – Reliable HF welders for small and medium pipe lines.
Olimpia 80 (Italy) – Integrates HF welding units into complete tube mill systems.
Shijiazhuang FAITH Machinery Co., Ltd. is a professional HF welder manufacturer and tube mill system integrator. The company’s welders are designed for continuous operation, stable current output, and precise control across a wide range of pipe diameters.
Key Features:
Solid-state HF technology (IGBT/MOSFET) for efficiency and long life
Automatic power regulation for consistent weld quality
Digital display and remote control interface
Compact modular design for easy maintenance
Low energy consumption for sustainable production
FAITH’s HF welders are suitable for both carbon steel and stainless steel ERW tube mills, ensuring clean, strong, and uniform weld seams.
| Model | Output Power | Frequency | Applicable Pipe Diameter | Efficiency |
|---|---|---|---|---|
| FAITH-HF100 | 100 kW | 200–400 kHz | 10–40 mm | ≥90% |
| FAITH-HF200 | 200 kW | 200–350 kHz | 20–80 mm | ≥90% |
| FAITH-HF400 | 400 kW | 150–300 kHz | 40–150 mm | ≥88% |
Customized power ratings and configurations are available based on production requirements.
FAITH Machinery offers comprehensive technical support, including:
On-site installation and commissioning
Training for operators and maintenance staff
Remote monitoring and troubleshooting
Fast spare parts supply
With successful projects in Asia, Europe, and South America, FAITH Machinery provides global service coverage and responsive after-sales assistance.
E-mail: crystal@faith-machinery.com
The HF welder is the key to achieving high-quality welded pipes with superior speed and strength. As the demand for precision-engineered tubes grows, investing in solid-state HF welding technology ensures long-term productivity and reliability.
With decades of experience, Shijiazhuang FAITH Machinery Co., Ltd. continues to deliver world-class HF welders and complete ERW tube mill solutions, helping manufacturers worldwide achieve consistent, efficient, and profitable operations.
Hot tag:
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