What is the correct procedure for testing a gas line for leaks?

The procedure of pressurizing the gas line and using a soap solution is the standard and most effective method for testing gas lines for leaks. By pressurizing the line, you create a condition where any leaks will allow gas to escape. The soap solution is then applied to the joints and fittings of the line. If there are any leaks, the escaping gas will create bubbles in the soapy water, making it easy to identify the location of the leak.

This method not only allows for a thorough inspection of the entire gas line but also provides a clear visual indication of potential leaks, ensuring safety and reliability before the line is put into service. It’s a widely accepted practice in the industry due to its effectiveness and efficiency in detecting small leaks that might not be visible otherwise.

In contrast, submerging the line underwater might not be practical for testing gas lines, leaving the line open to air does not provide insight into potential leaks, and relying solely on visual inspection can miss small leaks that are only detectable through the combination of pressure and a soap solution.