INDUCTION HEATING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a novel and improved induction heating apparatus capable of improving steel pipe heating efficiency while suppressing reduction in a production amount of steel pipes and increase in an operation cost.SOLUTION: The induction heating apparatus includes a plurality of ring-shaped coils 21 for induction-heating a steel pipe P. Each of the ring-shaped coils is rotatable about a rotation axis that passes through a center point of the ring-shaped coils and is perpendicular to a center axis of the steel pipe.SELECTED DRAWING: Figure 1