Low-stress exhaust pipe

The invention provides a low-stress exhaust pipe, and relates to the technical field of exhaust pipes, the low-stress exhaust pipe comprises a pipeline A, a pipeline B and a pipeline C which are in butt joint in sequence, the pipeline A is provided with three air inlet ports A, the pipeline B is provided with two air inlet ports B, and the pipeline C is provided with an air inlet port C and an exhaust port. Reinforcing ribs on the outer walls of the pipeline A and the pipeline B are omitted, the problems that the thermal stress of the exhaust pipe rises and the cracking risk is increased due to the fact that deformation of the pipeline with the high temperature is limited through the reinforcing ribs in the exhaust pipe with the low temperature are solved, the thermal stress of the exhaust pipe is reduced to a certain degree, and the service life of the exhaust pipe is prolonged. 本申请提供了一种低应力排气管，涉及排气管技术领域，包括依次对接的管路A、管路B和管路C，所述管路A上设有三个进气通口A，所述管路B上设有两个进气通口B，所述管路C上分别设有进气通口C和排气通口。本申请取消管路A和管路B外壁的加强筋，解决了排气管中温度低的排气管会