In This Issue

Minnesota Pipeline Routing Rule Change 

The State of Minnesota has revised the definitions in Chapter 216G – Pipelines concerning ROUTING OF CERTAIN PIPELINES (216G.02).  The rule revisions are given below (emphasis added):  

Subdivision 1. Definitions. 

  • For purposes of this section, the following terms defined in this subdivision have the meanings given: 
  • “Gas” means natural gas, flammable gas, carbon dioxide, gas that is toxic, or gas that is corrosive, regardless of whether the material has been compressed or cooled to a liquid or supercritical state
  • “Hazardous liquid” means petroleum, petroleum products, anhydrous ammonia, or a substance included in the definition of hazardous liquid under Code of Federal Regulations, title 49, section 195.2, as amended. 
  • Notwithstanding section 216G.01, subdivision 3, “pipeline” means: 
    – pipe with a nominal diameter of six inches or more that is designed to transport hazardous liquids, but does not include pipe designed to transport a hazardous liquid by gravity, and pipe designed to transport or store a hazardous liquid within a refining, storage, or manufacturing facility; or 
    – pipe designed to be operated at a pressure of more than 275 pounds per square inch and to carry gas

Note that these rules apply to “pipeline” routing, not pipeline safety, and require “pipelines” to obtain a pipeline routing permit issued by the Public Utilities Commission prior to construction.   

Editor’s Note: “Gas” would include natural gas that has been cooled to become LNG, as well as all states of CO2 except dry ice.  This combination of definitions results in supercritical CO2 being simultaneously considered both a gas and a liquid, since the federal regulations consider supercritical CO2 to be a liquid.   

For more information about the Minnesota Pipeline Routing Rule Change, please contact Jessica Foley.