How should venting occur for gas piping in vertical chases with fuel gas exceeding 5 psi?

Venting for gas piping in vertical chases that handle fuel gas exceeding 5 psi should be conducted directly into the chase or to the outdoors to ensure safety and prevent the accumulation of potentially hazardous gas. This approach is necessary because higher pressure gases have different venting requirements compared to lower pressure systems. Venting directly to the outdoors minimizes risks associated with gas leaks, allowing any released gas to disperse safely in the open air.

Venting into the chase itself provides a controlled environment that can effectively channel the gas away from occupied spaces, supporting effective gas management in the building structure. Other methods of venting, such as directing the gas to windows or side walls, could lead to dangerous situations such as accumulation near the building, where it could become a fire hazard or create an environment conducive to explosions.