The procedure involves isolating a section of gas piping and subjecting it to a specific level of pressure, using air or an inert gas, to verify its integrity. This process confirms that the system can safely contain the intended gas without leaks. For example, a newly installed or repaired gas line might be pressurized to 1.5 times its maximum operating pressure for a set period to identify any potential weaknesses.
This method is critical for ensuring public safety and preventing hazardous situations, such as gas leaks, explosions, or carbon monoxide poisoning. It validates the workmanship of installations and repairs, providing a verifiable record of system soundness. Historically, less sophisticated methods were employed, leading to increased risks and potential for catastrophic failures. The implementation of standardized procedures has significantly improved safety and reliability in gas distribution systems.