Technical Specifications for Large-Diameter Cylinder Seam Preheating & PWHT Systems

1. Medium-Frequency Induction Preheating Equipment (For Pre-Weld)

• Input: 380V ±20%, 3-Phase, 50-60Hz

• Output Power: 20KW to 200KW (multiple models)

• Output Frequency: 4-20 KHz

• Control Accuracy: ±5°C

• Cooling: Air-cooled

• Heater Configurations: Supports connection of 1 to 16 induction heaters.

2. Post-Weld Heat Treatment (PWHT) Temperature Control Equipment

• Input: 220V/380V ±20%, 50-60Hz

• Output Power: 20KW to 360KW (multiple models)

• Control Loops: 1, 3, 6, or 12 independent output loops for precise zone control.

• Control Accuracy: ±1°C

• Cooling: Air-cooled

3. Key Auxiliary Materials & Heaters

• Sheathed Thermocouples (K-type): Flexible, high-precision sensors for harsh environments (-200°C to 1800°C).

• Ceramic Heating Ropes: Flexible elements for irregular surfaces (-200°C to 1000°C, 1-15KW).

• Track-Type Ceramic Heating Plates: For uniform heating on pipes, elbows, etc. (500W-15KW per piece, combinable).

• Custom Shell-Type Heaters: Prefabricated, insulated heaters shaped to fit specific workpiece geometries (arc, right-angle, etc.).

• Medium-Frequency Extension Cables & Heating Sheets: Durable connections and flexible induction heaters with various high-temp sheath options.

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