NACE SP0170, also known as "Protection of Refinery Equipment from Corrosion," provides guidelines and practices for protecting equipment in refineries from corrosion. This standard is crucial for industries that deal with refining petroleum products, as corrosion can lead to significant safety risks, environmental hazards, and financial losses.
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 pdf 2021
: 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, also known as "Protection of Refinery
The primary objective of SP0170 is to provide reliable mitigation methods to prevent Polythionic Acid Stress Corrosion Cracking (PTA SCC). This form of cracking occurs when sensitized austenitic stainless steels react with oxygen and water in the presence of sulfide corrosion products—common in refinery units like hydrocrackers and hydrotreaters—during shutdown periods. Core Mitigation Practices Corrosion Prevention : Standards like NACE SP0170 are
The primary goal is to prevent the rapid, intergranular cracking of "sensitized" stainless steels (those exposed to high temperatures that cause chromium depletion at grain boundaries). Timeline Protection
Key Components of NACE SP0170 PDF 2021