Multi Turn Induction Coils are engineered for high frequency ERW tube and pipe mills where stable welding temperature and controlled heat distribution are critical.
Coil direction is not orientation dependent (left / right fark etmez). Electrical performance remains the same regardless of winding direction.
Connection Types:
Fork Type (Çatal bağlantı)
Tube Type (Boru bağlantı)
Cooling Configuration:
Up to certain diameters, Single Cooling (Tek boru soğutma) is sufficient to maintain thermal balance.
Beyond specific ID ranges, Double Cooling system is implemented.
In this configuration, the coil is designed as 2 Turn structure, ensuring:
Increased water circulation capacity
Reduced copper surface temperature
Stable impedance value
Longer operational life

Electrical & Thermal Design Principles
The coil is designed according to:
Required welding frequency
Tube outer diameter
Strip thickness
Line speed
Power supply capacity
Design priorities:
Minimum impedance loss
Controlled magnetic field concentration
Uniform heat distribution on V-area
Optimized copper cross-section
Efficient water channel geometry
Double cooling configuration reduces thermal stress and prevents:
Local overheating
Copper softening
Brazing joint fatigue

Manufacturing Specification
Material:
Electrolytic Copper (Cu-ETP, 99.99%)
Process:
Precision CNC machining
Controlled bending radius
Silver-free high temperature brazing (up to 500°C)
Surface cleaning and protective coating
Water Flow Design:
Balanced inlet-outlet geometry
Internal turbulence control
Pressure resistance tested

Technical Parameters (Example Range)
ID Range: Custom according to tube size
Turn: 1 Turn (Single Cooling)
2 Turn (Double Cooling for larger diameters)
Cooling Type: Internal water cooled
Connection: Fork or Tube

Engineering Advantage
Compared to standard coils:
Lower energy consumption
More stable weld seam quality
Reduced maintenance frequency
Longer service interval