| Feature | NACE SP0170-2021 | ISO 15156:2020 | | :--- | :--- | :--- | | | U.S. supplement for specific alloys and hardness limits | Global general requirements | | CRA Limits | More conservative for nickel alloys | Broader, with user responsibility | | Hardness Testing | Mandatory HRC conversion table | Refers to general practices | | Welding | Stricter HAZ limits for sour gas wells | Similar but less prescriptive | | PDF Availability | AMPP website | ISO/ANSI website |
in austenitic stainless steels and related alloys during equipment shutdowns. While the most recent major reaffirmed version is NACE SP0170-2018 nace sp0170 pdf 2021
However, as of 2025, remains the active, current standard. A 2024 revision has not been released; typical cycles are 5–8 years. | Feature | NACE SP0170-2021 | ISO 15156:2020
Don't wait until the shutdown starts to consult the standard. Effective protection requires pre-planning A 2024 revision has not been released; typical
If you work for an EPC firm or major operator, they likely have an enterprise subscription. Check your internal document portal before purchasing individually.
