Thermal decomposition tube with fluid stirring element

Provided is a thermal decomposition tube which has an effect of stirring a fluid in the tube and which is capable of preventing overheating due to the occurrence of laminar flow. This thermal decomposition tube (10) provided with stirring elements (20) is configured in such a manner that one or more fluid stirring elements protrude inward on the inner surface of the tube, and the stirring elements comprise: protrusions (21) that extend along the inner surface of the tube and that protrude inward from the inner surface of the tube, and protrusions (24) that protrude inward from the inner surface of the tube and that protrude inward from the inner surface of the tube; the protrusions (24) protrude inward from the inner surface of the tube at the peripheral portions of the ridges. The peripheral portion of the ridge preferably includes the upstream side and/or the downstream side of the ridge in the direction in which fluid flows in the pipe. 本发明提供一种热分解管，前述热分解管具备管内流体的搅拌效果，也能够防止由于发生层流而导致的过加热。本发明的具备搅拌元件（20）的热分解管（1