April 2022

Special Focus: Maintenance and Reliability

Mechanical impact of rerating process equipment

Process equipment operating in a brownfield environment is often rerated pertaining to the changes in process parameters during debottlenecking.

Rupesh, S., Independent Consultant

Process equipment operating in a brownfield environment is often rerated pertaining to the changes in process parameters during debottlenecking. Rerating, with regard to process equipment, means redesigning the equipment to adhere to new rerated conditions. Often, the design pressure and design temperatures are increased, and the equipment must be reevaluated for more severe design conditions—this is known as uprating. It is very important to reverify the mechanical design of the existing equipment to meet the new rerated conditions. Most of the existing equipment would be nearing the end of its life, and the impact of corrosion over the years would, most likely, be substantial. Therefore,

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