Nace Sp0170 Pdf 2021 -

NACE SP0170-2018 remains the active standard for protecting austenitic stainless steels from polythionic acid stress corrosion cracking (PTA SCC) during refinery shutdowns as of 2021, focusing on nitrogen purging and alkaline washing to mitigate risks. The standard, now managed by AMPP, outlines critical procedures for preventing corrosion in sensitized austenitic alloys common in hydrotreating and cracking units. Access the standard through the ANSI Webstore .

: Identifying that while 300-series stainless steels are common, super-austenitic and nickel-based alloys offer superior resistance in high-threat environments like hydrotreating. Key Prevention Strategies nace sp0170 pdf 2021

The operational atmosphere dictates the vulnerability of the asset: NACE SP0170-2018 remains the active standard for protecting

The standard applies to fixed refinery equipment such as: : Identifying that while 300-series stainless steels are

In the refining and petrochemical industries, the reliability of equipment during shutdowns is critical. One of the most severe corrosion threats during these periods is . NACE SP0170 (now commonly referred to by its latest revisions, including updates up to 2021) provides the industry-standard practices for mitigating this threat.

External protection of heater tubes and internal environments with limited water access. 1. Alkaline Washing Procedures