What is the test pressure requirement for gas piping tests?

The requirement for test pressure in gas piping systems is set to ensure the safety and integrity of the piping before it is placed into service. When testing gas piping, it is generally mandated that the pressure used during testing should be no less than 1.5 times the proposed maximum working pressure of the system. This standard is vital because it provides a margin of safety that accounts for possible weak points in the system, ensuring that the piping can withstand operational pressures once the gas is introduced.

Using a pressure that is at least 1.5 times the maximum working pressure during testing helps identify any potential leaks or weaknesses in the piping or joints that might not have been apparent at lower pressures. This rigorous testing standard serves to prevent future leaks or failures that may pose hazards to safety, property, or the environment.

Other answers suggest fixed values or lower multiples of working pressure, which do not meet the rigorous standard required for safety during gas piping tests.