Fitness for service and Rerate Calculations of Distillation Column

Posted on 9:04 pm

The scope of the project was to perform Fitness for Service and rerate calculations to analyze the adequacy of a distillation column. Distillation column has been in service for several years. The customer requested for additional corrosion allowance of the distillation column for several more years. Rerate of the distillation column included the shell, the heads, the skirt sections, all the nozzles with corresponding flanges, and the support trays. Calculations included the effect of wind bumpers, platform clips, and pipe supports. The structural adequacy against buckling was verified using Finite Element Analysis (FEA) for the increased corrosion allowance. The determination of structural integrity utilized both Eigen value buckling and nonlinear buckling analyses.