Question

A natural gas fuel ling has been installed at your facility. Describe the procedure for conducting a soap bubble leak test at 50 kPa prior to placing the line in service.

Answer 1

To conduct a soap bubble leak test at 50 kPa on a natural gas line, apply a soapy solution to the line with the gas on, observe for bubbles indicating a leak, mark and repair any leaks, and re-test to ensure the line is safe for service.

Step-by-step explanation:

To perform a soap bubble leak test on a natural gas fuel line at 50 kPa prior to placing the line in service, follow these steps:

1. Ensure the gas supply is regulated to 50 kPa pressure.
2. Prepare a soapy solution by mixing a suitable soap with water.
3. With the gas flowing, apply the soapy solution to all connections, joints, and potential leak points on the line.
4. Observe the applied areas for the formation of bubbles. The presence of growing or steady bubbles indicates a gas leak.
5. Mark any leaking areas and turn off the gas supply.
6. Repair the leaks as needed and re-test the areas to ensure repairs are effective.
7. Once no leaks are detected, the gas line can be considered safe to place into service.

Note that this test should be conducted in a well-ventilated area and safety protocols must be followed to prevent hazards.