Nace Sp0170 Pdf [2021] May 2026

The NACE SP0170 (now managed by AMPP) standard, titled "Protection of Austenitic Stainless Steels and Other Austenitic Alloys from Polythionic Acid Stress Corrosion Cracking During a Shutdown of Refinery Equipment," is a copyrighted document and is not legally available as a free "complete piece" PDF.

Key Alloy Families Covered

• Nickel-chromium-molybdenum alloys (e.g., UNS N06022, N07718 family variants)
• Nickel-chromium alloys (e.g., UNS N06025, N06600-type)
• Related nickel-based corrosion-resistant alloys used in sour environments

Cladding and Overlay Practices

• Procedures for welding nickel-alloy overlays on carbon steel or low-alloy substrates to provide corrosion-resistant linings.
• Control of dilution, interlayer practices, and multiple-pass weld overlay sequences.
• Cooling rates and interpass controls to limit dilution-induced phases.

“Dave, listen to me. You’re going to lift the pipe. Not much. Just half an inch.” nace sp0170 pdf

Material Selection: Choosing alloys more resistant to PTA SCC for critical refinery units like hydrocrackers and desulfurizers. Document Availability The NACE SP0170 (now managed by AMPP )