Analysis of Tube Wall Defects in Convection Chamber of Heating Furnace and Countermeasures
The working conditions of heating furnace tubes in petrochemical enterprises are very bad.They work in high temperature,high pressure and corrosive medium environment for a long time.Therefore,the furnace tubes should have good high temperature creep resistance,thermal fatigue resistance,oxidation resistance,carburization resistance,corrosion resistance,thermal conductivity and welding performance.According to the actual production application,the main failure forms of furnace tube are creep failure,oxidation corrosion failure,thermal fatigue failure,microstructure deterioration failure,failure caused by severe bending of furnace tube,failure caused by metallurgical defects of base metal,etc.This paper mainly aimed at the convection chamber furnace tube wall thickness determination thinning defect pipe cutting,macroscopic examination,material analysis,metallographic examination,electron microscope analysis,determine the defects for the furnace tube itself with the original smelting,manufacturing and processing defects,put forward the management and technical improvement measures.
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