Final answer:
The termination of a piping system purge line should generally be at least 10 feet away from any building or air intake, according to common safety standards, but the exact distance may vary based on local codes or the gas used.
Step-by-step explanation:
When purging a piping system to remove air and ensure it is filled with an inert gas like nitrogen, the guidelines and safety codes often specify that the termination of the purge line shall be at least a specific distance from structures to prevent the potential hazards of gas accumulation. While the exact distance can vary based on local codes and the gas used, a commonly accepted standard is that the termination should be at least 10 feet away from any building or air intake to mitigate the risks of fire, explosion, or asphyxiation. However, always refer to the current local codes or industry standards for the precise requirements in your area. These standards are critical for the safe operation of gas piping systems.