The most recent version of this standard is NACE SP0472-2020
. It was reaffirmed in 2020 by the Association for Materials Protection and Performance (AMPP) and remains the active edition as of 2026.
AMPP - The Association for Materials Protection and Performance Note that the designation changed from (Recommended Practice) to
(Standard Practice) in 2010 to align with NACE nomenclature.
AMPP - The Association for Materials Protection and Performance Latest Edition Details
Methods and Controls to Prevent In-Service Environmental Cracking of Carbon Steel Weldments in Corrosive Petroleum Refining Environments Active Status : Reaffirmed on August 17, 2020. nace rp0472 pdf new
: Covers guidelines for P-No. 1 carbon steel weldments to prevent hydrogen stress cracking (HSC), alkaline stress corrosion cracking (ASCC), and other forms of environmental cracking in refinery services. Hardness Limits : Generally limits weld metal hardness to (200 HBW) and heat-affected zone (HAZ) hardness to to prevent cracking. 分析测试百科网 Where to Access
You can find official copies or previews of the 2020 version through these platforms: AMPP Store : The official source for NACE SP0472-2020 ANSI Webstore : Provides a preview PDF showing the table of contents and foreword. Accuris (formerly IHS Markit) : Offers the current standard for purchase. Accuris Standards Store Do you need specific hardness requirements material exemptions for a particular project? NACE SP0472-2020 - Accuris Standards Store
Browse related products from National Association of Corrosion Engineers * National Association of Corrosion Engineers > Pipeline/ Accuris Standards Store NACE SP0472-2020.pdf
The standard formerly known as NACE RP0472 is now officially NACE SP0472 . As of April 2026, the current active version is NACE SP0472-2020 (Reaffirmed) Current Standard Overview Official Name
: 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 The most recent version of this standard is NACE SP0472-2020
(the merged organization of NACE International and SSPC) under Task Group 326. Key Technical Scope
This standard provides requirements for mitigating environmental cracking in carbon steel weldments within refinery environments.
AMPP - The Association for Materials Protection and Performance Application
: Covers pressure vessels, heat exchangers, and piping components. Requirements
: Focuses on material hardness, welding procedures, and PWHT to prevent cracking. Hardness Limit Refinery fixed equipment engineers
: Generally specifies a maximum weld deposit hardness of 200 HB.
Once you have the new PDF in hand, here are the core workflows you must execute.
A: Every 5 years approximately. Last full revision: 2020. Before that: 2015, 2010, 2005, 2002.
Because the keyword includes “PDF new,” it is clear you want a portable, searchable, and legal digital copy. Here is the step-by-step method.