Single-core pipe penetration piece

The utility model relates to the technical field of marine devices, and discloses a single-core pipe penetration piece which comprises a main penetration pipe, reducer pipes are fixed to the two ends of the main penetration pipe correspondingly, stainless steel hoses are fixed to the opposite ends of the two reducer pipes correspondingly, and mounting pipes are fixed to the opposite ends of the two stainless steel hoses correspondingly. The opposite ends of the outer pipe walls of the two installation pipes are fixedly sleeved with installation flange plates, and a plurality of installation holes are formed in the outer edges of the side walls of the two installation flange plates. According to the application, the two ends of the main cabin penetration pipe can be flexibly connected with the external pipeline, so that the failure of connection sealing between the main cabin penetration pipe and the external pipeline caused by fluctuation generated during the operation of a ship is reduced, and the stability