On Line Design & Engineering Ltd., a UK company providing engineering expertise to the piping and process industry, needed to maintain piping system operations within a major oil refinery after fitness for service measurements revealed potential problems.
During an inspection phase, a nozzle connection to a critical item of equipment (shell and tube heat exchanger) was found to be corroded. The plant owners were concerned that the remaining thickness to safely retain the fluid during operation was non-compliant with the site schedules and safety standards.
The EPC implemented CAESAR II for qualification of piping systems in accordance with appropriate design codes to ensure compliance with site and industry standards. NozzlePRO supplemented the solution by carrying out local finite element analysis on pipe components, included on the pipe checks.
Using CAESAR II and NozzlePRO, On Line Design & Engineering found that the piping system in question was safe since the loads produced on the equipment nozzle using the more refined and accurate model were lower than the owner operator originally believed. The analysis showed that the nozzle connection was still compliant with site and industry standards, enabling the owner operator to avoid an unnecessary nozzle exchange and an unproductive and lengthy shutdown of the system.