GGP Solid State High Frequency Welder for ERW Tube Mill Line
Overview
The GGP Solid State High Frequency Welder is one of the most critical components in an ERW (Electric Resistance Welded) Tube Mill Line. It provides the high-frequency electrical energy required to heat and weld the edges of steel strip continuously, ensuring strong and reliable weld seams for steel pipes and tubes.
Over the past decade, Chinese solid-state high-frequency welding technology has developed rapidly and gained worldwide recognition. Modern HF welders now incorporate advanced semiconductor technologies such as IGBT modules and Silicon Carbide (SiC) devices, significantly improving energy efficiency, welding stability, and operating reliability while reducing power consumption and maintenance costs.
The GGP HF Welder is designed for high-speed pipe production and is suitable for carbon steel, galvanized steel, stainless steel, and various special steel tube manufacturing applications.
Working Principle
The solid-state high-frequency welder converts three-phase AC power into high-frequency electrical energy through advanced rectification and inverter systems.
The generated high-frequency current flows through the induction coil or contact welding system, concentrating heat at the strip edges. Under the pressure of squeeze rolls, the heated edges are forged together to form a high-quality continuous weld.
Main Design Types
1. Parallel Resonance Design
The parallel resonance structure is widely adopted in modern Chinese HF welders.
Advantages
- High conversion efficiency
- Excellent power factor
- Lower operating temperature
- Easier maintenance
- Reduced energy consumption
- Better suitability for high-speed production
Applications
- Carbon steel pipe production
- Structural tubing
- Water pipes
- Furniture tubes
- Automotive tubing

2. Series Resonance Design
The series resonance structure is commonly used by some European manufacturers.
Advantages
- Stable output under varying loads
- Strong anti-interference capability
- Excellent welding consistency
Applications
- Precision tube production
- High-end industrial tube manufacturing
- Special alloy tube production
Both designs have proven performance in the global tube manufacturing industry and can be selected according to customer requirements.
Key Features
Advanced IGBT Technology
High-performance IGBT modules ensure:
- Fast switching speed
- Stable frequency output
- High reliability
- Reduced maintenance
Optional SiC Technology
Latest Silicon Carbide technology offers:
- Lower switching losses
- Higher energy efficiency
- Reduced heat generation
- Smaller equipment footprint
- Longer component life
Intelligent Digital Control
- Real-time monitoring
- Automatic fault diagnosis
- Easy parameter adjustment
- User-friendly HMI interface
Energy Saving Design
Compared with traditional vacuum tube welders, the GGP solid-state HF welder can reduce energy consumption by 20%–40%.
High Reliability
- Industrial-grade components
- Robust cooling system
- Continuous 24-hour operation capability
Technical Specifications
| Item | Specification |
|---|
| Input Voltage | 380V / 415V / 440V / Custom |
| Input Frequency | 50Hz / 60Hz |
| Output Frequency | 100kHz – 500kHz |
| Power Range | 100kW – 1200kW |
| Cooling Method | Water Cooling |
| Control System | PLC + HMI |
| Semiconductor Device | IGBT / Optional SiC |
| Power Factor | ≥0.95 |
| Efficiency | Up to 92%–96% |
| Protection Level | IP54 |
Suitable Tube Sizes
The GGP HF Welder can be matched with various ERW tube mills:
Small Tube Mills
- Diameter: 10 mm – 50 mm
- Power: 100 kW – 300 kW
Medium Tube Mills
- Diameter: 50 mm – 127 mm
- Power: 300 kW – 600 kW
Large Tube Mills
- Diameter: 127 mm – 325 mm
- Power: 600 kW – 1200 kW
Applications
The GGP Solid State HF Welder is widely used in:
- ERW Steel Pipe Production Lines
- Structural Tube Manufacturing
- Water Pipe Production
- Oil & Gas Pipe Manufacturing
- Furniture Tube Production
- Automotive Tubing
- Greenhouse Pipe Production
- Construction Pipe Manufacturing
- Solar Structure Tube Production
Advantages Compared with Vacuum Tube Welders
| Solid State HF Welder | Vacuum Tube Welder |
| Higher Efficiency | Lower Efficiency |
| Lower Energy Consumption | Higher Energy Consumption |
| Less Maintenance | Frequent Maintenance |
| Smaller Footprint | Larger Footprint |
| Longer Service Life | Shorter Service Life |
| Stable Output | Output Fluctuation |
| Digital Control | Analog Control |
Standard Configuration
- Rectifier Cabinet
- Inverter Cabinet
- Control Cabinet
- Water Cooling System
- Output Transformer
- Induction Coil Assembly
- Protection System
- PLC Control System
- Operator Interface
Frequently Asked Questions (FAQ)
Q1: What is the role of the HF welder in an ERW tube mill?
The HF welder generates high-frequency electrical energy to heat and weld the strip edges together, forming a continuous welded tube.
Q2: Which is better, parallel resonance or series resonance?
Both designs are reliable. Parallel resonance systems generally offer higher efficiency and lower operating costs, while series resonance systems may provide stronger load adaptability in certain applications.
Q3: What is the benefit of SiC technology?
SiC devices significantly reduce switching losses, improve efficiency, decrease heat generation, and extend equipment lifespan.
Q4: Can the welder be integrated into existing tube mills?
Yes. The GGP HF Welder can be integrated with most ERW tube mill brands and configurations.
Q5: How much energy can be saved compared with traditional vacuum tube welders?
Depending on production conditions, energy savings typically range from 20% to 40%.
Q6: Do you provide installation and technical support?
Yes. We provide commissioning, training, online support, spare parts supply, and long-term technical assistance.
Why Choose GGP Solid State HF Welder?
With advanced IGBT and optional SiC technology, intelligent control systems, high conversion efficiency, and proven reliability, the GGP Solid State High Frequency Welder delivers superior welding performance for modern ERW tube manufacturing.
Whether you are building a new tube mill or upgrading an existing production line, GGP provides a cost-effective, energy-efficient, and future-ready welding solution.
RELATION EQUIPMENT
We provides all equipment to tube mill entry section:
Coil Car
Single And Double Heads Un-coiler & Hydraulic And Pneumatic Un-coiler
Peeler and hold down roll arm
Flattening Machine
Automatic and Semi Auto Shearer & Butt Welder
Vertical Cage Accumulator & Horizontal Loop Accumulator & Landing Horizontal Spiral Loop Accumulator


OUR SERVICE
Why Choose Us?
Leading Technology, Reliable Quality, Excellent Service!
Optimized Design, High quality material select!
Heat treatment process guarantee!
Spiral bevel gear, drum gear coupling and carburization.
Gear teeth quenching.
Driven system stable, efficient and wearable with lower noise.
High precision wear resisting and Long life of rollers.
All the machine Lathes, Key Grooves are positioned and Milled by CNC.
