CONNECTING STRUCTURE AND CONNECTING METHOD FOR METALLIC CORRUGATED TUBE

The present invention relates to a connecting structure for a metallic corrugated tube and a connecting method thereof, which can surely prevent leakage of a fluid by sealing and connecting an end of a metallic corrugated tube with a connecting body in an airtight manner. The connecting structure for a metallic corrugated tube comprises: a metallic corrugated tube which has a polished tilting surface on the inner circumferential surface at an end thereof; a fastening nut which is placed on the outer side of the metallic corrugated tube and includes female threads on the inner circumferential surface; a stop ring which is adjacent to the polished tilting surface of the metallic corrugated tube, whose inner circumferential surface adheres to the outer circumferential surface of the metallic corrugated tube, and whose outer circumferential surface adheres to the inner circumferential surface of the fastening nut; and a connecting body where an adhering tilting surface is formed at an end to adhere to the polished tilting surface of the metallic corrugated tube, and where the fastening nut is combined with the outer circumferential surface adjacent to the adhering tilting surface. A sealing groove unit is formed on the adhering tilting surface of the connecting body while a heat-resistant sealing member is installed in the groove unit.