In designs for piping with refractory lining used inResidue Fluid Catalytic Cracking Process (RFCC) and FluidCatalytic Cracking Process (FCC) of a refinery, no influentialdesign factors are considered, such as the effects of lining stiffnessand the difference of themal expansion between pipe and lining.However, influences of lining due to its stiffness and thedifference of themal expansion between pipe and lining would notbe negligibly small. This paper proposes a new stress analysismethod for piping with lining. The analysis is performed by apiping stress analysis program.The pipe and lining are modeled by beam elements. This methodapplies a modified flexibility factor and a modified stressintensification factor for pipe and lining respectively. These twokinds of factors are individually obtained by comparing the resultsof FEM analysis using 3D shell/solid elements with the results ofpiping analysis by beam theory. The experiments for pipingwithout lining and piping with lining were carried out at roomtemperature, and the validity and accuracy of the proposed methodwere verified by comparing the experimental results.
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