Public Safety 

Natural Gas Delivery System 

There are three types of lines in the natural gas network. These lines are used to transport natural gas.

  • Transmission pipelines are the largest and have a pressure of 400 to as much as 1000 pounds per square inch. These lines carry gas long distances from the refineries to localities where it will be used.
  • You can call NIPSCO for help with transmission lines if no contact information is available.
  • Natural gas in transmission pipelines may not yet be odorized, especially in low-density areas. Leaks from these lines may not be detectable by smell alone. Be cautious.
  • The next type of natural gas line is the main (also referred to as distribution lines). These are smaller lines with a pressure of less than 100 pounds per square inch. They are the property of NIPSCO. Call NIPSCO for assistance with mains.
  • Service lines are the lines that run from mains to individual structures. They have the same pressure as the main line that feeds them, but they can still cause a significant leak. Call NIPSCO for assistance with these.
  • The size of a pipe is not a reliable indicator of the gas pressure. This information is intended only as an overview. Always assume there’s a danger.