The challenge
A process improvement required operating existing reactors at higher pressure. Replacing the vessels would have cost months of production; the client needed an engineering basis acceptable to the statutory inspector.
Our approach
We performed thickness and NDT surveys, built detailed FE models including nozzles, supports and the agitator mounting, ran elastic-plastic and fatigue analyses to ASME VIII Div 2 Part 5, and prepared the re-rating dossier for approval by the competent authority.
The outcome
All four reactors were re-rated and approved, allowing the process change without capital replacement.
Representative engagement. Client identity and certain project details are withheld or generalised under confidentiality agreements.