Gas Fitter Practice · Question
What is the minimum working pressure to perform a leak test on a natural gas piping system?
According to CSA B149.1, the test pressure must be at least 1.5 times the maximum operating pressure, but never less than 3 PSI (21 kPa), for a reliable leak te
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Question: What is the minimum working pressure to perform a leak test on a natural gas piping system?
Answer options: ✅ At least 1.5 times the maximum operating pressure, but not less than 3 PSI (21 kPa).
- The normal operating pressure of the system.
- 0.5 PSI (3.5 kPa).
- As high as the gauge allows, up to 100 PSI (690 kPa).
Correct answer: At least 1.5 times the maximum operating pressure, but not less than 3 PSI (21 kPa).
Explanation: According to CSA B149.1, the test pressure must be at least 1.5 times the maximum operating pressure, but never less than 3 PSI (21 kPa), for a reliable leak test.
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