Nace Sp0170 Pdf 2021 < ULTIMATE × ANTHOLOGY >
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Hydroprocessing loops operate under deeply reducing conditions with high hydrogen sulfide (
The 2021 standard mandates that users must confirm compliance with the recommended methods to ensure protection is actually achieved. How to Obtain NACE SP0170-2021 PDF
For decades, engineers have relied on a specific shield against this invisible threat. In 2021, that shield was refined and re-released as , formally titled “Protection of Austenitic Stainless Steels and Other Austenitic Alloys from Polythionic Acid Stress Corrosion Cracking During Shutdown of Refinery Equipment.” * nace sp0170 pdf 2021
Refinery materials, inspection, and operations personnel reference this standard practice when planning turnarounds. The choice of protection method depends heavily on the specific asset class being handled: Equipment Asset Class Primary Risk Factors Recommended SP0170 Mitigation Path
Indirect Inspection
If you can tell me if you are looking for this for a , an active shutdown , or internal training , I can help you find more specific implementation advice. The official source for all NACE standards
The standard provides procedures to prevent the formation of polythionic acids, which occur when oxygen and water react with sulfide corrosion products on equipment surfaces. GlobalSpec Materials & Fabrication
The standard focuses on austenitic stainless steels and high-nickel alloys that may be susceptible to specific forms of corrosion after exposure to high temperatures.
NACE SP0170-2021 is an indispensable tool for protecting sensitized austenitic stainless steel equipment from the disastrous effects of PTA SCC. By following the procedures for alkaline washing and excluding oxygen during shutdowns, refiners can significantly extend the life of their equipment and prevent catastrophic failures during startup. In 2021, that shield was refined and re-released
The standard addresses both internal surfaces (reactor internals) and external surfaces (heater tubes) subjected to sulfide-containing combustion products. 5. Accessing NACE SP0170-2018/2021
The reference to "PDF 2021" likely indicates you're seeking the 2021 version of this standard in PDF format. Standards like these are periodically updated to reflect advancements in technology, changes in industry practices, and lessons learned from field experiences.
| Standard | Title | Focus Area | Primary Concern | | :--- | :--- | :--- | :--- | | | Protection of Austenitic Stainless Steels... from Polythionic Acid SCC | Refinery shutdowns | Polythionic acid (PTA) cracking in sensitized austenitic alloys | | NACE MR0175 / ISO 15156 | Materials for use in H₂S-containing Environments in Oil and Gas Production | Upstream (oil & gas production) | Sulfide stress cracking (SSC) from H₂S exposure | | NACE MR0103 / ISO 17945 | Materials Resistant to SSC in Corrosive Refinery Environments | Downstream (refining, petrochemicals) | Sulfide stress cracking (SSC) in H₂S service, different material limits | | NACE SP0169 | Control of External Corrosion on Underground or Submerged Metallic Piping Systems | External corrosion control | Cathodic protection (CP) criteria (e.g., -850mV or 100mV polarization) |
NACE SP0170 (Standard Practice) provides guidelines for the Protection of Austenitic Stainless Steels and Other Austenitic Alloys from Polythionic Acid Stress Corrosion Cracking (PTA SCC) During Shutdown of Refinery Equipment The current version of this standard was published in (revising the 2012 edition) by (the organization formed by the merger of NACE and SSPC). Key Focus of NACE SP0170-2021