Which type of pipe is most commonly used for natural gas lines?

The most commonly used type of pipe for natural gas lines is polyethylene pipe. This choice is favored due to its flexibility, resistance to corrosion, and light weight, which makes it easier to handle and install compared to other materials. Polyethylene is also particularly effective in underground applications, where it can withstand the soil's pressures and is less prone to leakage.

While galvanized steel pipe has been historically used in gas distribution systems, it is not as common in recent installations, as it can corrode over time and create potential safety hazards. Copper pipe is less frequently used for gas applications as well, primarily due to cost and compatibility issues. PVC pipe is not suitable for gas lines due to its limitations regarding pressure and flammability. Overall, polyethylene’s properties make it the preferred choice for modern natural gas installations.