EXHAUST PIPE

To provide an exhaust pipe which can suppress the lowering of the temperature holding performance of a connection part of a double-pipe.SOLUTION: One embodiment of this disclosure is an exhaust pipe having a first double-pipe and a second double-pipe. The first double-pipe has a first outer pipe for surrounding an external peripheral face of a first inner pipe, and a first space which is formed between the external peripheral face of the first inner pipe and an internal peripheral face of the first outer pipe. The second double-pipe has a second inner pipe, a second outer pipe for surrounding an external peripheral face of the second inner pipe, and a second space which is formed between the external peripheral face of the second inner pipe and an internal peripheral face of the second outer pipe. The first space is blocked in a connection part of the first double-pipe and the second double-pipe. A blocking end of the connection part of the first space is overlapped on the second space in a radial direction of the first inner pipe.SELECTED DRAWING: Figure 2 【課題】二重管の接続部における保温性の低下を抑制できる排気管を提供する。【解決手段】本開示の一態様は、第１二重管と第２二重管とを備える排気管である。第１二重管は、第１内管と、第１内管の外周面を囲う第１外管と、第１内管の外周面と第１外管の内周面との間に設けられた第１空間とを有する。第２二重管は、第２内管と第２内管の外周面を囲う第２外管と、第２内管の外周面と第２外管の内周面との間に設けられた第２空間と、を有する。第１空間は、第１二重管と第２二重管との接続部において閉塞される。第１空間の接続部における閉塞端は、第１内管の径方向において第２空間と重なる。【選択図】図２