Electric resistance welded steel pipe manufacturing device and electric resistance welded steel pipe manufacturing method

An electric resistance welded steel pipe manufacturing device that is configured to perform welding while forming a strip-shaped steel sheet in a tubular shape and supplying a plasma flow to a pair of abutment end surfaces to perform shielding, the electric resistance welded steel pipe manufacturing device comprising:

• a mandrel;
• and
• a plasma flow feeder that is provided in the mandrel to supply the plasma flow.

An electric resistance welded steel pipe manufacturing method that is configured to perform welding while forming a strip-shaped steel sheet in a tubular shape and supplying a plasma flow to a pair of abutment end surfaces to perform shielding, the electric resistance welded steel pipe manufacturing method comprising:

• a step of supplying the plasma flow toward the pair of abutment end surfaces from an inside of the strip-shaped steel sheet that forms a tubular shape.