Texas CNG(Compressed Natural Gas) Driver Practice

At what pressure must piping, tubing, hoses, and hose assemblies be leak-tested?

1. At 75% of the maximum pressure

2. At normal operating pressure

3. At 150% of the maximum pressure

4. At zero pressure

The correct answer is: At normal operating pressure

The requirement for leak-testing piping, tubing, hoses, and hose assemblies at normal operating pressure is essential for ensuring the safety and integrity of the system. Conducting a leak test at this pressure allows operators to simulate actual operating conditions, identifying any potential leaks that could occur during regular usage. This approach not only helps in confirming the reliability of the components but also ensures that they can withstand the forces and stresses they will encounter during operation. Testing at normal operating pressure is a vital part of preventive maintenance, as it directly correlates with the pressure levels that will be seen in typical use. This practice helps to establish confidence in the system’s performance and reinforces safety standards crucial in handling compressed natural gas (CNG), which can be hazardous if leaks occur. While testing at various pressures might seem practical for ensuring integrity, normal operating pressure specifically addresses the conditions under which the system will actually function.