What must be done to piping or tubing that passes through concrete?

When piping or tubing passes through concrete, it is essential for it to be sleeved. This practice serves multiple purposes, primarily preventing damage to the piping or tubing due to the compressive forces and expansion/contraction associated with the concrete. Sleeving also allows for the movement of the pipe or tube, accommodating any shifts in the concrete without compromising the integrity of the system.

Additionally, sleeving provides a degree of protection from corrosion and reduces the risk of contamination from moisture and other substances present in the concrete. It creates a barrier that ensures the longevity and safety of the piping or tubing as well as the overall gas system.

While other options such as painting or wrapping with insulation may provide some level of protection, they do not address the critical need for clearance and movement that sleeving provides when passing through concrete structures. Leaving the piping exposed would greatly increase the risk of damage, making sleeving the most appropriate and effective solution in this scenario.