Natural gas leak in underground piping: signs and safe investigation

Underground leaks are more difficult to detect because the gas can travel through the soil and emerge at a different location from the actual damage.

Possible signs

An unusual odor, gas readings in manholes or enclosed spaces, and unexplained pressure loss may require investigation.

Gas migration in soil

Gas can follow piping, wiring, drains, or other underground conduits.

Inspection

Investigation is performed using appropriate equipment and by specialized personnel. Random excavations without locating the line increase the risk.

Isolation

If a leak is confirmed, the relevant section is isolated according to emergency procedures.

After the repair

A tightness test is performed, and as-built drawings are updated if the route or the piping section has been modified.