Fixed flange corrugated pipe

The utility model discloses a fixed flange corrugated pipe, and relates to the technical field of corrugated pipe connection, the fixed flange corrugated pipe comprises a flange plate, a connecting pipe is fixedly connected to the flange plate, and the end, away from the flange plate, of the connecting pipe is sleeved with a corrugated pipe body. Through cooperative arrangement of the connecting pipe, the annular air bag, the inflation pipe, the communicating pipe and other structures, after a user inserts the annular air bag into the inner cavity of the corrugated pipe body through the connecting pipe, the position of the annular air bag is adjusted by sliding the corrugated pipe body, so that the annular air bag moves into the inner cavity of the corrugated pipe; the annular air bag is inflated and expanded to be tightly attached to the corrugated inner wall, the sealing performance of the joint of the corrugated pipe body and the connecting pipe is improved, the expanded annular air bag can form limiting,