When underground gas piping penetrates walls, how should the pipe and sleeve space be managed?

When underground gas piping penetrates walls, managing the pipe and sleeve space is crucial for safety and functionality. The correct approach is to ensure that the sleeve space is large enough to prevent contact between the gas pipe and the wall. This space allows for thermal expansion and contraction of the pipe, which can occur due to changes in temperature. Furthermore, maintaining a gap helps to reduce the risk of wear and tear on the pipe, which could lead to leaks. It also facilitates proper drainage and minimizes the potential for moisture accumulation around the pipe, which could lead to corrosion or deterioration over time.

Having a tightly fitted sleeve or a securely welded joint would not allow for any movement or thermal expansion, increasing the risk of damage to the pipe. Sealing the sleeve with cement may create a barrier that could trap moisture and create additional risks or issues. Thus, ensuring ample space is vital for maintaining the integrity and safety of the gas piping system.