Not legally, unless you are an AMPP member accessing the member portal. The standard is copyrighted intellectual property. Free versions online are either outdated or counterfeit.
The industry standard formerly known as has been officially updated and designated as NACE SP0472 (Standard Practice). The most current and active revision is NACE SP0472-2020 ( Methods and Controls to Prevent In-Service Environmental Cracking of Carbon Steel Weldments in Corrosive Petroleum Refining Environments ).
The 2020 revision (reaffirmed from 2015) refined the guidelines based on years of field experience and laboratory research.
AMPP - The Association for Materials Protection and Performance Note that the designation changed from (Recommended Practice) to nace rp0472 pdf new
The current active version is , titled "Methods and Controls to Prevent In-Service Environmental Cracking of Carbon Steel Weldments in Corrosive Petroleum Refining Environments" . Why This Standard Matters
: The scope expanded to protect the entire weldment, specifically incorporating Heat-Affected Zone (HAZ) properties and targeting multi-mechanism environmental cracking.
"Methods and Controls to Prevent In-Service Environmental Cracking of Carbon Steel Weldments in Refining Environments," Not legally, unless you are an AMPP member
. This standard provides the critical technical framework for controlling weld hardness in P-No. 1 carbon steels to prevent Hydrogen Stress Cracking (HSC) and Sulfide Stress Cracking (SSC) in downstream refinery operations.
The welding processes covered by this standard include:
The standard outlines three critical control methods to maintain the integrity of the steel: Hardness Control: The industry standard formerly known as has been
AMPP - The Association for Materials Protection and Performance Essential Resources & Previews Official NACE SP0472-2020 Document
If you are writing a specification for a 2026 project, watch the AMPP website for the . However, for current contracts, the 2020 reaffirmed version remains the only “new” enforceable standard.