Posts in Refineries & Plants
Steam Plant Piping Corrosion

A steam generating plant supporting an associated thermal recovery project in the Middle East was experiencing through-wall corrosion of carbon steel lines. In some locations this was aggressive enough to corrode through replacement piping in as little as two months.
Downtime in the steam plant was reducing heavy oil production and increasing OPEX. GATE was invited to the site to take a closer look at the operation and management of the system and determine how corrosion could be more effectively controlled.

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Onshore Asset Integrity Management

GATE was consulted to identify the source of unexpected levels of H2S that had been detected in the central processing facility. Ultimately, GATE was able to determine that multiple operational issues needed to be addressed to mitigate the high levels of H2S in the processing facility, rather than the H2S naturally occurring in the reservoir.

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Inspection Plan Development for Mothballed Equipment

A South American operator developed plans to return a sulfur recovery unit to service after an initial ten years of service and a further ten years of mothballing due to changes in field production requirements.

The corrosive nature of molten sulfur, carbon dioxide and hydrogen sulfide in the unit, coupled with the expectation of a less than optimum preservation strategy in a littoral offshore environment, generated a large set of integrity risks that needed to be evaluated to determine the feasibility of repairing and reinstating the system for a further ten years of service.

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