Nace Sp0170 Pdf Jun 2026

Identify all equipment containing austenitic stainless steels operating in the sensitization temperature range with sulfur present.

Adhering to the NACE SP0170 standard is crucial for maintaining the integrity of stainless steel equipment in refinery environments. By following the recommended cleaning, purging, and drying techniques, industries can effectively prevent the severe consequences of polythionic acid stress corrosion cracking, ensuring safety and reducing maintenance costs. nace sp0170 pdf

Crucially, the solution must be allowed to dry on the surface, leaving behind a protective alkaline film. This film continuously neutralizes any future acid formation if moisture ingress occurs later in the shutdown. Crucially, the solution must be allowed to dry

NACE SP0170 serves as the definitive global engineering standard for preventing this specific failure mechanism during non-operational periods. It provides operating companies, inspection personnel, and maintenance contractors with clear, actionable procedures to safeguard equipment from the moment a unit begins cooling down until it is safely brought back online. The standard applies to: It provides operating companies

Searching for the is common among three groups of professionals:

Air introduced into the system must be dehumidified to a very low dew point (typically below -18°C or 0°F).