What is the minimum specific test pressure (in psig) to be used when testing a natural gas line?

When testing a natural gas line for leaks, it is essential to conduct the test at a pressure that is sufficient to ensure safety and system integrity. The minimum specific test pressure for a natural gas line is 3 psig. This pressure level is established to effectively detect any potential leaks in the piping system under conditions that closely simulate operational pressures. Testing at this pressure helps in ensuring that the pipe fittings, joints, and the overall installation are secure and meet safety standards. If a lower pressure were used, it might not adequately reveal weaknesses or areas that could fail under normal operating conditions, potentially leading to serious safety hazards. Therefore, using a test pressure of 3 psig ensures a comprehensive evaluation of the gas line system’s integrity.