Nace Sp0170 Pdf 2021 !link! Online

The 2018 revision (reaffirmed in later years by AMPP) applies to austenitic stainless steels and nickel alloys used in high-temperature environments. It is essential when:

Yes. Following the merger of NACE International and SSPC to form AMPP in 2021, the standard may be rebranded as AMPP SP0170. However, the technical requirements remain consistent with the 2018 NACE version until a new revision is issued. nace sp0170 pdf 2021

The relative humidity (RH) inside the vessel must be maintained at low levels (typically under 20% RH ). By keeping the environment completely dry, liquid water cannot condense on the metal faces, halting the chemical reaction required to generate polythionic acid. Industry Application and Implementation Matrix The 2018 revision (reaffirmed in later years by

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). If these acids interact with sensitized austenitic stainless steels (such as 304 or 316) under tensile stress, rapid intergranular cracking occurs, often causing catastrophic equipment failure upon restart. Key Mitigation Strategies in NACE SP0170

) break into the system, they react with these sulfide corrosion products to form polythionic acids ( H2SxO6cap H sub 2 cap S sub x cap O sub 6