Induction coil

✅ 4. Comparison of Induction Coil Types for HF Welding

📌 Selection Tips

• Small pipes (<50 mm): Spiral coil is recommended for its simplicity and cost-effectiveness.

• Medium pipes (50–150 mm): U-shaped coils offer efficient, focused heating.

• Large or irregular pipes (>150 mm): Saddle coils cover a wider area and handle complex profiles.

• High-efficiency requirements: Ferrite core coils help reduce energy loss and improve heat focus.

• Versatile production lines: Adjustable coils are ideal for lines requiring flexibility in pipe diameters.

✅ 5. Working Principle

1. The HF generator sends current to the induction coil.

2. A strong high-frequency magnetic field is created around the coil.

3. As the pipe passes through the coil, eddy currents are induced at the edge surfaces.

4. These currents generate localized heat at the pipe’s seam (skin effect + proximity effect).

5. When the pipe edges reach the fusion point, squeeze rollers press them together to form a solid weld without filler material.

✅ 6. Technical Parameters (Typical Values)

✅ 7. Summary

• The induction coil is a key part of HF welding, enabling non-contact, high-speed seam welding for pipe production.

• Coil shape and size are customizable to match pipe diameter and welding specifications.

• High durability, excellent thermal conductivity, and magnetic field efficiency are critical for stable, continuous production.

• Proper cooling and maintenance significantly extend coil life and welding consistency.

1. Enter Section Equipments
2.  
3. 1. Coil car and Storage
4. 2.Single And Double Heads Un-coiler & Hydraulic And Pneumatic Un-coiler
5. 3.Peeler and hold down roll arm
6. 4.Flattening Machine
7. 5.Automatic and Semi Auto Shearer & Butt Welder
8. 6.Vertical Cage Accumulator​ & Horizontal Loop Accumulator & Landing Horizontal Spiral Loop Accumulator
   

1.  
2. 1. Eddy current machine
3. 2. Seam annealing machine
   
4. 3. Straightener machine
   
5. 4. Chamfer and end facer machine
   
6. 5. Hydro Tester machine
   
7. 6. Threading machine
   
8. 7. Painting and oil machine
   
9. 8. Automatic bundle and package machine

1.  
2. 1. Rollers, Moulds, Dies, D2,D3 material to choose
3. 2. Ferrite, Impeder, Fiberglass tube
   
4. 3. HSS saw blades, TCT Saw blades, Friction saw blades
   
5. 4. OD burr remove inserts, ID burr remover inserts
   
6. 5. HF welder Induction Coil and other HF welder spare parts
   
7. 6. Copper tube for induction Coil, PTFE pipe for Induction Coil
   
8. 7. Mosfet, Boards
   
9. 8. Steel pipe Strapping machine
   
10. 9. Zinc Spray Machine, Zinc wire, Zinc spray gun

1. Why Choose Us?
   

2. 1.Leading Technology, Reliable Quality, Excellent Service! Optimized Design, High quality material select!  Heat treatment process guarantee!

3. 2.Spiral bevel gear, drum gear coupling and carburization. Gear teeth quenching. Driven system stable, efficient and wearable with lower noise.

4. 3.High precision wear resisting and Long life of toolings. All the machine Lathes, Key Grooves are positioned and Milled by CNC.

5. 4.Quality department make sure the material of the raw materials quality, and ensure the machine running perfect.

After-sales service

1. 1.Machine test running videos will supply to customer before shipment.
2. 2.Online techenical support WHOLE LIFT FREE.
   
3. 3.Professional engineers team to install the machine,  train your employee well.
   
4. 4.One year warranty and life-long technical support.
   
5. 5 .24 hours for engineer response.
   
6. 6.Your business relationship with us will be confidential to any third party.
7. 7.  We welcome customers to visit our factory anytime.