Nace Rp0472 Pdf !exclusive! Guide

The standard specifically addresses and stress-oriented hydrogen-induced cracking (SOHIC) . These are nasty forms of cracking that occur when hard weldments are exposed to wet H₂S (sour service) environments.

Portable Brinell hardness testers are typically used on actual production welds. nace rp0472 pdf

If the hardness exceeds the limit, you must perform Post Weld Heat Treatment. The standard specifies: it has been revised several times

NACE RP0472 is a standard recommended practice titled "Methods and Controls to Prevent In-Service Environmental Cracking of Carbon Steel Weldments in Corrosive Petroleum Refining Environments" . First approved in 1972, it has been revised several times, with the most recent editions being RP0472-95, RP0472-2000, and RP0472-2005. It was later re-designated as (Standard Practice) around 2010, with a further revision in 2015. with a further revision in 2015.