Automotive flexible joints (automobile exhaust pipe bellows) are important connecting components in the automotive field. Utilizing its own unique air tightness, and adopting double-layer hydraulic pressure and water as the medium during molding, the corrugated pipe made is more conducive to the emission of automobile exhaust gas and minimizes the environmental pollution caused by engine exhaust gas. It is used to absorb the vibration of the exhaust system and prevent excessive thermal deformation, thereby providing a comfortable ride. Stainless steel SUS304 is used as the main material of the flexible joint, it can withstand high temperature and salt corrosion. The bellows can be equipped with net sleeves and expansion joints, which can eliminate engine noise. Therefore, the automotive flexible joint (automobile exhaust pipe bellows) has become the most ideal compensation component in modern industrial supporting pipes.