The customer had several tanks that did not comply with API 650. A Fitness for Service (FFS) was performed using Finite Element Analysis with the load combinations mandated by API 579-1/ASME FFS-1, Table B1.2. The FFS included the linear and limit load analyses for the nozzles. Non-linear buckling analysis was performed to determine the adequacy of the anchor chair gusset plates under wind/seismic forces.
- Tank with Nozzle Layout
- Linear Analysis: von Mises Stress around Nozzle A
- Linear Analysis: von Mises Stress around Regular Type Nozzle
- Limit Load Analysis: Von Mises Plastic Strain around Regular Type Nozzle
- Non Linear Anchor Chair Gusset Buckling Analysis