Identify all equipment constructed from 300-series stainless steels or austenitic nickel alloys operating within the sensitization temperature range in sulfur-rich environments.
The official active document for this designation is , which remains the current industry standard practice for protecting austenitic stainless steels from polythionic acid stress corrosion cracking (PTA SCC).
Direct Examination (Verification)
When oxygen and water mix with sulfide scales, they rapidly react to form ( H2SxO6cap H sub 2 cap S sub x cap O sub 6
During operations, hydrogen sulfide ( H2Scap H sub 2 cap S nace sp0170 pdf 2021
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: Covers the entire shutdown process, including downtime and the periods immediately preceding and following it (start-up). Target Materials : Focuses on common refinery alloys like UNS S30400 (304 SS) S31600 (316 SS) , and stabilized grades like This link or copies made by others cannot be deleted
) in the presence of sulfur compounds, iron sulfides form on the surfaces of stainless steel.
(formerly RP0170) is the current standard for the Protection of Austenitic Stainless Steels and Other Austenitic Alloys from Polythionic Acid Stress Corrosion Cracking During a Shutdown of Refinery Units . Try again later
When implementing these procedures, rely strictly on verified, authentic copies of the standard to ensure safety compliance and engineering accuracy.