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Residue fluid catalytic cracking (RFCC) is a process that cracks heavy oil into light oil, such as gasoline, with zeolite catalysts. Treated atmospheric residue (AR) [low-sulfur bunker-C from the residue [...]

The article presents several case studies related to accidents and failures of stationary equipment in the residue fluidized catalytic cracking units (RFCCUs). Topics discussed include failure of a catalyst cooler tube and aeration pipe due to poor insertion of inner tube to outer tube and bad welding quality, leakage of a slide valve packing due to improper countermeasures when valve stem was stuck and Leakage of carbon monoxide boiler tube due to urea solution penetration into insulation.