The standard provides essential mitigation methods for refinery equipment—such as desulfurizing, hydrocracking, and hydrotreating units—where the risk of PTA SCC is high. PTA SCC typically occurs when metal sulfides on equipment surfaces react with oxygen and moisture during a shutdown, forming polythionic acids that attack sensitized stainless steels. Mitigation Methods Outlined in SP0170
. If you are operating with austenitic stainless steels, the NACE SP0170-2018 standard nace sp0170 pdf 2021
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NACE SP0170 PDF 2021 has significant implications for industries that use equipment and components in petroleum refining and petrochemical environments. Some key implications include: nace sp0170 pdf 2021
Direct Examination (Verification)