Compound pipeline capable of being repaired and manufacturing method thereof

The invention discloses a compound pipeline capable of being repaired and a manufacturing method thereof, and belongs to the technical field of chemical pipeline equipment. On-site repairing of a pipeline bushing and on-site manufacturing of the pipeline are achieved. According to the technical scheme of the compound pipeline, two flanges are welded to the two ends of an outer pipe correspondingly, a round barrel formed by rolling a lead plate is adopted as the bushing, and the bushing is sleeved with the outer pipe; the outer wall of the bushing is in close contact with the inner wall of theouter pipe, and the two ends of the bushing stretch out of the two ends of the outer pipe; and vertical flanges are arranged at the two ends of the bushing along the end face of the outer pipe and thework faces of the flanges. The expansion coefficient difference between the lead plate bushing and the outer pipe is small, the lead plate is good in malleability, is rarely influenced by heat expansion and cold contraction a