Nace Sp0170 Pdf 2021 File

NACE SP0170 (2021) serves as a critical industry standard for protecting austenitic stainless steel equipment from polythionic acid stress corrosion cracking (PTA SCC) during refinery shutdowns. The practice outlines essential mitigation techniques, including nitrogen blanketing and alkaline washing, to prevent failures in sensitized stainless steel. While foundational for safety, modern discussions analyze its application alongside advanced, resistant materials. For further technical details, visit GlobalSpec .

At its core, this technical document is a survival guide for massive oil refinery components—like hydrotreating reactors and piping—during their most vulnerable moments: . The Story of a Shutdown nace sp0170 pdf 2021

Data-Driven Probability Mapping: Operators are advised to develop a likelihood-of-corrosion model combining weighted contributors: CP potential trends, coating age/type and condition, soil resistivity and chemistry (pH, chloride, sulfate), topography and drainage, and historical excavation findings. The 2021 guidance encourages use of statistical scoring and, where available, machine-learning approaches to combine disparate data streams. NACE SP0170 (2021) serves as a critical industry

As of 2025, the official NACE SP0170 PDF 2021 costs approximately $150–$250 for members (less if you join AMPP). For a piece of equipment that costs millions, this is a trivial investment. For further technical details, visit GlobalSpec

Direct Examination (Verification)

In 2003, the standard was restructured into two parts: