If underground piping is shielded, what must it be encased in?

Underground piping that is shielded typically must be encased in steel pipe to ensure durability and protection against external forces or environmental factors. Steel is a robust material that offers significant strength and resistance to impacts, which is critical for maintaining the integrity of the piping system located underground. Additionally, steel provides excellent resistance to corrosion when properly coated, making it suitable for long-term use in various conditions.

Though other materials such as concrete, plastic, or rubber could potentially provide some level of protection, they may not offer the same level of durability and structural support as steel for this specific application. Concrete, while strong, can crack under certain conditions, and plastic may not withstand the same forces as steel in a subsurface environment. Rubber, on the other hand, does not have the same structural integrity as steel when it comes to withstanding external pressures and potential ground movement. Therefore, encasing underground piping in steel is the preferred choice for ensuring a highly secure and resilient system.