What is the gas pressure test requirement for new piping?

What is the gas pressure test requirement for new piping?

• A. 1 psi for 15 minutes
• B. 5 psi for 10 minutes
• C. 3 psi for 10 minutes
• D. 2 psi for 60 minutes

Answer: (C)

Testing new gas piping is about proving it can hold an overpressure without leaking. The standard requires applying a test pressure of 3 psi and maintaining it for 10 minutes. This level of overpressure is enough to reveal leaks in joints and fittings without over-stressing typical piping components. The test is done with air or another non-flammable gas (not natural gas) to avoid ignition risk, and the system is then purged before service. If any pressure drop or signs of a leak appear, repairs are made and the test is repeated until the pressure holds for the full duration. That combination—3 psi for 10 minutes—best matches the required procedure.

Testing new gas piping is about proving it can hold an overpressure without leaking. The standard requires applying a test pressure of 3 psi and maintaining it for 10 minutes. This level of overpressure is enough to reveal leaks in joints and fittings without over-stressing typical piping components. The test is done with air or another non-flammable gas (not natural gas) to avoid ignition risk, and the system is then purged before service. If any pressure drop or signs of a leak appear, repairs are made and the test is repeated until the pressure holds for the full duration. That combination—3 psi for 10 minutes—best matches the required procedure.