Stainless steel pipe / tube for exhaust fabrication

Stainless steel pipes specifically designed for exhaust systems should be resistant to high temperature oxidation and sulfide corrosion at 800 ℃. Priority should be given to using 409 and 439 ferritic stainless steel, which combines cost and thermal fatigue resistance, and is suitable for exhaust emission scenarios in automobiles and industrial equipment.

Adopting high-frequency welding or seamless spinning technology to ensure the welding strength of thin-walled tubes (0.8-2mm), annealing is required to eliminate stress after bending and forming. Some high-end models have added aluminum infiltration coating to enhance salt spray resistance and meet the National VI emission standards.

The stainless steel pipe / tube industry is upgrading towards lightweighting and intelligence, combining laser cutting with 3D bending technology to achieve complex exhaust layouts, while integrating sensors to monitor back pressure and temperature, promoting an efficiency improvement of over 30% in environmental protection equipment.