This paper summarizes the development and objectives of NACE International Standard Recommended Practice RP0472-95, “Methods and Controls to Prevent In-Service Environmental Cracking of Carbon Steel Weldments in Corrosive Petroleum Refining Environments”. Two types of environmental cracking are included; cracking due to hydrogen charging and stress corrosion cracking (SCC). Weldrnents are defined to include the weld deposit, base metal heat affected zones (HAZs) and adjacent base metal zones subject to residual stresses from welding.