What is a common hazard when a pipe has been leaking for an extended period?

When a pipe has been leaking for an extended period, one common hazard is the drying of the soil surrounding the leak, which can lead to static ignition. As the soil loses moisture due to the escaping gas, it can become more susceptible to static electricity buildup. This static electricity can create a spark that ignites the gas, posing a significant safety risk.

In contrast, increased gas pressure is not typically a hazard related to a prolonged leak; instead, prolonged leaks usually result in decreased pressure in the system. The rapid flow of gas might occur in specific scenarios like a sudden failure but is not the direct result of a leak over time. Enhanced strength of the pipe contradicts the nature of prolonged leaks, as a pipe that is leaking often indicates deterioration rather than an increase in strength. Understanding these risks helps in managing and mitigating hazards associated with gas distribution pipe maintenance and repair.