DOT’s pipeline administration proposes new CO2 pipeline requirements

In Washington, the U.S. Department of Transportation’s Pipeline and Hazardous Materials Safety Administration (PHMSA) announced new comprehensive proposed requirements for carbon dioxide (CO2) and hazardous liquid pipelines.

The Notice of Proposed Rulemaking (NPRM) will strengthen existing standards for hazardous liquid and CO₂ pipelines (including CO2 that is transported in a supercritical fluid state), and for the first-time, establish new standards for transporting carbon dioxide in a gaseous state via pipeline. The proposal also specifically addresses lessons learned from PHMSA’s multi-year investigation into a CO2 pipeline failure in Satartia, Mississippi, in 2020 as well as input from the public in what has been PHMSA’s largest public outreach campaign on record.