Chevron did not effectively implement internal recommendations to help prevent pipe failures
due to sulfidation corrosion. In the 10 years prior to the incident, a small number of Chevron
personnel with knowledge and understanding of sulfidation corrosion recommended on several
occasions either a one-time inspection of every component within the 4-sidecut piping circuit—
known as 100 percent component inspection—or an upgrade of the material of construction of the
4-sidecut piping. The recommendations were not implemented effectively, and the 52-inch
component remained in service until it failed on August 6, 2012. (