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API RP 939-C - Guidelines for Avoiding Sulfidation (Sulfidic) Corrosion Failures in Oil Refineries

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API RP 939-C, Guidelines for Avoiding Sulfidation (Sulfidic) Corrosion Failures in Oil Refineries, First Edition, is a recommended practice developed and published by the American Petroleum Institute (API) that provides guidance on avoiding sulfidation corrosion in oil refining operations. This RP is directed at integrity professionals managing hydrocarbon process streams containing sulfur compounds, with or without the presence of hydrogen, which operate at approximate temperatures between 450F (230C) and 1000F (540C).

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