In testing a natural gas line to an appliance, what is the minimum test pressure to be used regarding the maximum working pressure?

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The minimum test pressure for a natural gas line to an appliance is determined by safety and regulatory standards. The correct answer indicates that the minimum test pressure should be at least equal to the maximum working pressure of the gas line. This approach ensures that the system can withstand the expected operational pressures without risking any structural failures or leaks.

When the test pressure matches the maximum working pressure, it allows for the verification of the integrity of the gas line under conditions similar to its operating environment. This is crucial for ensuring that any potential leaks or weaknesses in the system can be identified before the system becomes operational.

Using a test pressure that exceeds the maximum working pressure significantly, as suggested in other options, may not be practical or required, as it could lead to unnecessary stress on the piping, joints, and appliances, increasing the potential for damage or failure. Therefore, matching the test pressure to the maximum working pressure is a standard practice in the industry for ensuring safety and reliability in natural gas systems.

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