March 2015

Special Report: Corrosion Control

Extend heat exchanger lifecycle with hyper-duplex stainless steel

Intensifying performance demands in refineries, coupled with the ongoing decline in crude oil quality, require a new and improved duplex SS grade to withstand increasingly tough operating conditions. This need has led to the development of hyper-duplex stainless steels.

Perea, E., Sandvik Materials Technology

As much as 50% of scheduled or unscheduled shutdowns in process plants is attributed to unavoidable repairs necessitated by corrosion damage in tubes, pipes and associated equipment. Although certain material problems can be ascribed to other factors, the effects of corrosion remain a substantial concern for refineries around the world and cause significant increases in operational and maintenance costs. Intensifying performance demands High demands are being placed on tubes in heat exchanger equipment that is used to recover heat from hot gas streams and transfer it to water or oils in refinery processes. Since such processes are dependent on the efficient transfer of heat from one medium

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