If you are looking for the latest requirements to prevent environmental cracking in carbon steel weldments, do not use NACE RP0472 . You must use AMPP SP0472-2023 .
Every 5 years approximately. Last full revision: 2020. Before that: 2015, 2010, 2005, 2002.
AMPP (ampp.org) is the exclusive rights holder. The standard is now called (or upcoming 2025 revision). As of 2024-2025, the “new” version is the 2020 reaffirmed edition with technical corrigenda. nace rp0472 pdf new
AMPP - The Association for Materials Protection and Performance Note that the designation changed from (Recommended Practice) to
To define, prevent, and control environmental cracking—specifically Hydrogen Stress Cracking (HSC) and Alkaline Stress Corrosion Cracking (ASCC) —in carbon steel weldments. If you are looking for the latest requirements
The main goal of NACE SP0472 is to mitigate . Carbon steel (specifically P-No. 1 steels) possesses high weldability but remains highly susceptible to aggressive chemical attack at the weld joints. The standard applies to all components of a weldment:
The standard emphasizes using carbon steels with low hardenability. Harder, untempered martensite formed during welding is highly susceptible to cracking in wet H2Scap H sub 2 cap S Last full revision: 2020
AMPP (The Association for Materials Protection and Performance) . Consequently, the document is now designated as ANSI/AMPP SP0472