Heat the a 5” (130mm) length of a steel pipe to 480◦F (250◦C) using an air-cooled induction heating unit and a flexible coil.
• 6.5” (165mm) OD steel pipe with 5″ (127mm) ID.
• Wrapped with a 2″ (51mm) layer of insulation that was compressed down to a 1.5” (38mm) layer.
• Heat zone of 5” (127mm) on a 43” (1.1m) long pipe.
Power: 12 kW
Temperature: 475◦F (245◦C) surface, 430◦F (220◦C) inside.
Time: 200 sec.
Results and Conclusions:
Heating the steel pipe with the air-cooled unit can be successfully achieved in approximately 200 seconds. The average difference between the surface and the inside temperature is 80◦F (27◦C). The end temperature on the inside of the pipe was 430◦F (220◦C) after allowing the heat to soak into the part. The part was wrapped with insulation to prevent damage to the flexible coil.