The most current, active version of the standard is . In 2010, NACE International re-designated its standards to better reflect their application type. The "RP" (Recommended Practice) designation was changed to "SP" (Standard Practice). Therefore, RP0472 is a historical document that has been superseded by SP0472-2010 .
The standard covers only carbon steels classified as , as per the ASME Boiler and Pressure Vessel Code, Section IX, or other relevant codes like ASME/ANSI B31.3, API 620, and API 650. The scope explicitly excludes steels with a minimum specified tensile strength over 480 MPa (70,000 psi) .
This article provides a comprehensive overview of the standard, covering its scope, key updates, and how to acquire the most recent documentation. What is NACE RP0472/SP0472? nace rp0472 pdf new
). Unlike HSC, this cracking propagates along grain boundaries and is driven directly by high residual welding stresses rather than material hardness alone. Critical Requirements and Weld Quality Controls
: Requires the HAZ of pressure boundary, internal attachment, and repair welds to comply with a maximum hardness of Postweld Heat Treatment (PWHT) The most current, active version of the standard is
: It eventually replaced API RP 942 , becoming the recognized industry consensus standard for these controls.
NACE SP0472-2020: Methods and Controls to Prevent In-Service Environmental Cracking of Carbon Steel Weldments in Corrosive Petroleum Refining Environments . Therefore, RP0472 is a historical document that has
The updated NACE RP0472 PDF emphasizes the importance of following best practices to ensure the effective application of cathodic protection to offshore structures:
: Provides the current standard and allows for a preview of the table of contents and foreword.