Nace Sp0170 Pdf !full! Jun 2026

If the equipment does not need to be opened for internal inspection or maintenance, the simplest and most effective strategy is to exclude oxygen completely.

Identify all sensitized or potentially sensitized austenitic equipment in high-sulfur service. Scope Definition

Monitor relative humidity continuously if using the dry-air method. Quality Control nace sp0170 pdf

) are formed on the metal surface during high-temperature service in a refinery environment.

At 3:00 AM, Dave texted her a photo. The pipe was lifted, the red isolation pads in place, the temperature reading steady. Beneath it, he wrote: “Next time, I’m reading the footnotes.” If the equipment does not need to be

NACE SP0170 does not exist in a vacuum. It is part of a comprehensive suite of standards addressing corrosion and cracking in refinery equipment. Professionals who use SP0170 often refer to:

She visited Site 7 the next morning. Gray fog lay over the concrete apron. The pipeline, a belching artery along the shoreline, had been retrofitted with impressed current anodes years ago. The technician handed her a digital logger and a steaming cup. He'd been at this site for twenty years; his face was as weathered as the rusted railings. "We do what the book says," he said. "Still, it keeps finding new places to rot." Quality Control ) are formed on the metal

A critical caveat in SP0170 is chloride stress corrosion cracking (Cl-SCC). To prevent introducing a secondary cracking mechanism, the water used to mix the soda ash solution must have strictly controlled, ultra-low chloride levels (typically less than 50 ppm, and ideally less than 20 ppm). 3. Dehumidification (Dry Air Blanketing)

: It can also be applied to crude distillation units, coking units, and fluid catalytic cracking units (FCCUs) if the user has concerns regarding PTA SCC. Key Mitigation Methods