Refinery site pipe networks may be at risk of experiencing sulphidation corrosion in situations when high-sulphur crude oil is high-temperature processed at temperatures exceeding 450°F.
In hydrogen-free process streams, carbon steel piping with less than 0.1% silicon (Si) can exhibit significant accelerated / non-uniform corrosion.
Recent advances in handheld XRF allow direct measurement of Si in carbon steel piping systems at levels below 0.1%, even at elevated pipe temperatures of up to 650°F (343°C).
This rapid and definitive positive material identification (PMI) technique complies with API RP 939-C by directly analysing in-service components.
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