The NACE SP0170 standard isn’t just a technical manual; it is a silent guardian of the world’s industrial skeleton. To understand its story, you have to look at the invisible war constantly being waged between steel and the elements. The Problem: The Invisible Eater
: Maintaining temperatures above the dew point to prevent liquid water formation. nace sp0170 pdf
NACE SP0170-2018 provides critical guidelines for protecting austenitic stainless steels from polythionic acid stress corrosion cracking (PTA-SCC) during refinery shutdowns. Key mitigation techniques outlined in the standard include alkaline washing, dry air purging, and nitrogen purging to prevent, neutralize, or exclude moisture and oxygen from sensitized alloys. Purchase the official document via the ANSI Webstore Intertek Inform The NACE SP0170 standard isn’t just a technical
Do not assume "soda ash" is generic. Verify the concentration of sodium carbonate solution (typically 2-5% by weight) using titration or conductivity. dry air purging