For residential natural gas piping under 200 ft and less than 2 psig, what is the pressure test time?

For residential natural gas piping that is under 200 feet in length and operates at pressures less than 2 psig, the standard pressure test time specified is 15 minutes. This duration is established to ensure the integrity of the piping system and to detect any potential leaks.

During this test, the system is pressurized to a predetermined level, usually around 1.5 times the maximum allowable operating pressure. The 15-minute timeframe is considered adequate for monitoring any drop in pressure, which would indicate a leak. This ensures that the gas distribution system is safe for operation before being put into service.

The other timeframes mentioned would not align with the recognized industry standards for such specific conditions, which is why they do not apply to this scenario.