California ICC UST Inspector Practice Exam

What is an incorrect testing method for newly installed primary pressurized piping?

1. Hydrostatically at 150% of designed operating pressure

2. Pneumatically at 110% of designed operating pressure

3. Automatic tank gauge 0.1 gph test

4. The minimum test pressure is 40 psi

The correct answer is: Automatic tank gauge 0.1 gph test

For newly installed primary pressurized piping, the testing methods must adhere to specific standards to ensure safety and functionality. The correct answer identifies an incorrect testing method as the automatic tank gauge 0.1 gph test is not an acceptable verification method for the integrity of pressurized piping systems. Primary pressurized piping systems require methods that specifically assess the pressure containment capabilities of the pipes themselves. This includes methods like hydrostatic testing, where the system is filled with water and subjected to a pressure greater than its operational pressure to identify any leaks or weaknesses. Similarly, pneumatic testing can be employed, but it must be carefully managed given the increased risks associated with pressurizing gas systems. On the other hand, an automatic tank gauge 0.1 gph test is primarily designed for monitoring underground storage tanks (USTs) to detect leaks but does not provide the pressure testing required for newly installed pressurized piping. This method evaluates fuel levels and potential leaks over time rather than assessing the immediate structural integrity of the pipes under pressure. The other methods mentioned ensure the piping's capability to handle operational conditions before being utilized. For instance, hydrostatic tests performed at 150% of the designed operating pressure or pneumatic tests at 110% provide clear assessments of potential failures.