Turnaround (refining)

Turnarounds (or TAR's) are scheduled events wherein an entire process unit of an industrial plant (refinery, petrochemical plant, power plant, pulp and paper mill, etc.) is taken offstream for an extended period for revamp and/or renewal. Turnaround is a blanket term that encompasses more specific terms such as I&Ts (Inspection & Testing), debottlenecking projects, revamps and catalyst regeneration projects. Turnaround can also be used as a synonym of shutdowns and outages.