60KW Induction Heater: Designed Specifically for Pre-Welding Applications
In welding processes, pre-welding heating is a critical step to ensure welding quality. It reduces the cooling rate of the welding area, minimizes welding stress and deformation, and effectively prevents crack formation-especially for high-carbon steel, alloy steel, thick-walled components, and other scenarios with strict welding performance requirements. The 60KW induction heater, with its specialized technical design, stands as a professional device in pre-welding heating, providing stable and efficient preheating support for various welding operations.
| Model |
60KW Induction Preheating PWHT Machine |
| Input Voltage |
3 Phase 380V, 50HZ |
| Output Frequency |
5KHZ ~ 30KHZ |
| Output Power |
60 KW |
| Input Current |
0-90A |
| Cooling Type |
Air cooling |
| Heating Temperature |
Preheat 0 - 350 C |
| Temperature Control |
1 Channel or 4 Channel |
| Heating Pipe size |
Dia: 50 -1000 mm |
| Heating Coil |
Induction Coil, Heating Blanket, Clamp Induction Coil |
| Extend cable |
1-20 meter |
| Heating Blanket |
Induction heating blanket, High temperature tube |
| Alarm |
Over Voltage, Over Current, Over Temperature and so on |
Core Functions: Precisely Meeting Pre-Welding Heating Needs
Pre-welding heating demands controllable temperature, uniform heating, and compatibility with welding rhythms. The 60KW induction heater achieves targeted adaptation through the following designs:
- Precise temperature control: Equipped with high-precision thermocouples and an intelligent temperature control system, it offers a temperature adjustment range of 50°C to 800°C (extendable to higher levels on demand) with a control accuracy of ±3°C. This strictly adheres to preheating specifications for different materials (e.g., low-alloy steel requires preheating to 150-300°C before welding, while high-carbon steel pipes need 250-400°C).
- Focused local heating: Customized induction coils (such as annular, flat, or flexible coils) enable directional heating of welding grooves and the surrounding area (2-3 times the wall thickness). This avoids energy waste from overall workpiece heating, making it ideal for local preheating scenarios like pipe butt joints and pressure vessel head welding.
- Compatibility with welding rhythms: Supports both continuous and intermittent heating modes. The continuous mode suits streamlined batch pipe welding, while the intermittent mode adapts to segmented welding of large components. After heating, it maintains stable temperatures (with a temperature decay rate ≤5°C/min when used with insulation cotton), allowing sufficient time for welding operations.
Technical Advantages: Ensuring Welding Quality and Efficiency
Compared to traditional pre-welding heating methods like flame heating and resistance heating, the 60KW induction heater offers significant technical benefits:
- Over 50% higher heating efficiency: Utilizing electromagnetic induction to generate heat within the workpiece itself, it achieves a heat conversion efficiency of up to 85%. This saves energy costs compared to flame heating (with ~30% thermal efficiency) and features rapid heating (e.g., a φ300mm carbon steel pipe preheats from room temperature to 250°C in just 8-10 minutes), drastically reducing welding preparation time.
- Superior heating uniformity: Multi-frequency adjustment technology (typically 5-50kHz) allows adjusting current penetration depth based on workpiece thickness and material, ensuring minimal temperature gradients in the preheated area (radial temperature difference ≤10°C) and avoiding stress concentration from local temperature variations.
- High operational safety: No open flames or high-temperature fumes reduce fire and poisoning risks. The device includes overcurrent, overvoltage, overheating, and leakage protection. Non-contact heating between the coil and workpiece prevents operators from direct exposure to high-temperature components.
Application Scenarios: Covering Welding Needs Across Industries
The 60KW induction heater's power and adaptability make it widely applicable in industrial pre-welding heating:
- Petrochemical pipeline welding: Preheats butt welds of long-distance pipelines and pressure vessels, especially for high-strength materials like X80 steel and Cr-Mo alloy steel pipes, preventing cold cracking.
- Heavy machinery manufacturing: Preheats thick-plate joints in large structural parts (e.g., crane booms, excavator bases) to reduce welding deformation.
- Power engineering: Ensures mechanical performance of welded joints in boiler pipes and steam turbine casings through precise preheating, meeting high-temperature and high-pressure operational requirements.
- Bridges and steel structures: Preheats welding nodes in bridge steel components and high-rise building steel structures to enhance fatigue resistance of welded joints.
Equipment Features: Balancing Professionalism and Practicality
- Dual-purpose design (portable and fixed): Some models feature a split structure (separate host and induction coil) with a movable host and flexible, bendable coils, adapting to complex on-site environments (e.g., high-altitude pipes, narrow-space welding preheating). Fixed models suit standardized preheating of batch workpieces in workshops.
- Data recording and traceability: Equipped with a touchscreen interface, it stores over 100 preheating parameters (e.g., temperature curves, heating time) and supports data export for quality traceability and process optimization.
- Durability: Induction coils use high-temperature resistant insulation materials (e.g., quartz, ceramics) for long-term high-temperature operation. The host employs industrial-grade components, adapting to -10°C to 40°C environments with a mean time between failures (MTBF) ≥5000 hours.
The 60KW induction heater combines technical precision and industrial practicality through specialized pre-welding heating design. It not only meets strict welding quality standards but also creates tangible value for enterprises by improving efficiency and reducing energy consumption, making it an indispensable device in modern welding processes.
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