Nace Rp0472 Pdf New Exclusive May 2026

"Methods and Controls to Prevent In-Service Environmental Cracking of Carbon Steel Weldments in Corrosive Petroleum Refining Environments"

In the late 1960s, a series of failures in hard weld deposits led to the development of this standard to mitigate and other forms of environmental cracking. It specifically targets P-No. 1 carbon steels (those with a tensile strength up to 70,000 psi) used in pressure vessels, piping, and heat exchangers. Key Technical Focus Areas nace rp0472 pdf new

for weld deposits to compensate for portable testing variations, which is more stringent than the 22 HRC limit often cited in upstream standards like MR0175. Heat-Affected Zone (HAZ) 000 psi) used in pressure vessels