Pipe haved dual type using corrugated plate and manufacturing method thereof

摘要

The present invention relates to a steel pipe having a double structure using a corrugated steel plate and a method for manufacturing the same, and to a steel pipe having a double structure by being formed from a single corrugated steel plate and a method for manufacturing the same. The steel pipe having a double structure using the corrugated steel pipe of the present invention is formed using one corrugated steel plate, so the manufacturing cost can be lowered, and the first closed space and the second closed space extended in the longitudinal direction are formed alternately to provide high external pressure strength. It has the advantage that the inside is formed smoothly, so that the fluid moves smoothly. In addition, the manufacturing method of a steel pipe having a dual structure using a corrugated steel pipe of the present invention is economical because the manufacturing process is simple and the manufacturing cost can be lowered because the acid and the acid are formed in contact with each other using a single corrugated steel plate. And, since the first closed space and the second closed space are formed to be located alternately, there is an advantage that it is possible to manufacture a steel pipe having a smooth inner circumferential surface with high external pressure strength and smooth fluid movement.