. It was reaffirmed in 2020 by the Association for Materials Protection and Performance (AMPP) and remains the active edition as of 2026.
You can find the latest official version through the following platforms:
: Specifically covers P-No. 1, Group 1 or 2 steels with a minimum specified tensile strength of 70,000 psi (485 MPa) or less . Where to Find the Document
The latest version of the standard NACE SP0472-2020 focuses on two primary cracking mechanisms: nace rp0472 pdf new
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.
: Applicable to various welding processes, including SMAW, GMAW (including FCAW), GTAW, and SAW.
A form of cracking that occurs in the HAZ of welds, often forming a "stack" of cracks perpendicular to the applied stress. 1, Group 1 or 2 steels with a
The updated NACE RP0472 PDF emphasizes the importance of following best practices to ensure the effective application of cathodic protection to offshore structures:
You can obtain the official PDF for the current version (SP0472-2015) from the (formerly NACE Store). Since the standard is a copyrighted publication, it must be purchased. The file size is approximately 280 KB and contains 17 pages.
NACE RP0472 identifies several forms of cracking driven by the environmental factors present in refineries: As of 2024-2025, the “new” version is the
If you are looking for the latest insights regarding the updates, this comprehensive article breaks down the standard's history, its transition from a Recommended Practice (RP) to a Standard Practice (SP), core technical requirements, and best practices for compliance. 1. The Evolution: From NACE RP0472 to SP0472
: Methods and Controls to Prevent In-Service Environmental Cracking of Carbon Steel Weldments in Corrosive Petroleum Refining Environments. Active Edition NACE SP0472-2020 Organization : Maintained by
Welding procedures must be qualified with hardness testing to ensure the hardness limits are met.