High Frequency Heating Steel Pipe

High Frequency Heating Steel Pipe With Induction Heating Equipment

Objective To heat a steel pipe to 1100ºF (593ºC) to transport melted magnesium
Material Steel pipe 14.5’ (4.42m) long with a 3.5” (88.9mm)OD
Temperature 1100ºF (593ºC)
Frequency 9 kHz
Equipment • DW-MF-160kW induction heating system, equipped with a remote workhead containing one 25μF capacitor.
• An induction heating coil designed and developed specifically for this application.
Process A specially designed double U channel coil the length of the pipe is used in this application. The pipe is placed inside the coil and power is supplied. The voltage is set and the power output is 100kW. As the part reaches the Currie point the power drops to 80kW and the voltage must be increased to achieve the 140kW. The pipe reaches 1100ºF (593ºC) in 20 minutes.
Results/Benefits Induction heating provides:
• Controllable and repeatable heat pattern that keeps
material in liquid form
• Environmentally friendly
• Even distribution of heating
• Movable workhead that can be located away from the power supply

high frequency heating steel pipe








induction heating pipe





induction heating steel pipe



Induction Heating Steel Pipe To Remove plastic coating

Induction Heating Steel Pipe To Remove plastic coating With RF Heating System

Objective Recover the polypropylene insulation from hollow steel tubes to allow recycling of both the tubes and the insulation.
Material Hollow steel tubes 1/8” (0.318 cm) to 5/8” (1.59 cm) ID
Protective polypropylene coating
Temperature 150 ºC (302°F)
Frequency 185 kHz
Equipment • DW-UHF-4.5kW induction heating system, equipped with a remote workhead containing one 1.5 μF capacitor
• An induction heating coil designed and developed specifically for this application.
Process/Narrative A six turn letterbox shaped coil is used to heat the inner steel pipes. The plastic coating is softened enough to be easily removed and recycled. The time required to melt the plastic from one meter of wire is approximately 45 seconds. This varies based on the diameter of the tube.
Results/Benefits Induction heating is the only feasible way to remove the plastic coating,
leaving it in an unpolluted form for recycling. It is a faster processing method and also reduces in the company’s carbon footprint.

induction heating removing plastic







induction heating steel pipe for removing plastic