Interest in renewable diesel has increased significantly in recent years. In 2019, the estimated US renewable diesel consumption was 900 million gallons  followed by an estimated 960 million gallons in 2020. This trend is expected to continue in the coming years. Conversion of existing petroleum facilities to renewable diesel production provides an appealing path for many producers, but careful evaluation of the conversion must be performed to ensure that the facility is operating safely and in full compliance with PSM standards. While the existing relief and flare systems may have been adequate for the petroleum refinery service, these systems should be reviewed and redesigned along with the new process as the demand on these systems can significantly change.