Electrical heating apparatus

An electrical heating apparatus for supplying electric power to a metal pipe material to electrically heat the metal pipe material, the electrical heating apparatus comprising:

• at least two electrodes that come into contact with the metal pipe material;
• a power supply unit that supplies electric power to the electrodes;
• a warning unit that issues a warning that abnormality has occurred in the electrical heating of the metal pipe material;
• and
• an abnormality detection unit that detects abnormality of the electrodes,
• wherein the abnormality detection unit includes
• a resistance value acquisition unit that acquires a resistance value between the electrodes, and
• an abnormality determination unit that determines that abnormality has occurred in the electrodes, in a state where the electrodes and the metal pipe material are in contact with each other, and controls the warning unit to issue a warning that abnormality has occurred in the electrodes, in a case where the resistance value reaches a predetermined setting value.