What inspection technique can indicate the integrity of fuel lines?

Visual inspections for wear, abrasion, and signs of leakage are crucial techniques for assessing the integrity of fuel lines. This approach allows for the immediate identification of physical issues that can compromise the safety and functionality of the fuel system. During a visual inspection, the inspector can look for cracks, corrosion, or any signs of wear that might not be detectable through other methods. Detecting signs of leakage at an early stage can prevent potentially dangerous situations, such as fuel spills or fire hazards, which are particularly important when dealing with highly flammable substances like LPG or CNG.

While techniques like ultrasonic testing can be effective for identifying internal defects, they may not provide the same level of immediate visual evidence as a thorough inspection of the exterior of the fuel lines. Pressure testing is an important method to ensure that the system can handle operational pressures, but it does not provide insight into physical wear or degradation. Similarly, thermal imaging can reveal temperature fluctuations, which might suggest issues elsewhere in the system, but it is not specifically designed to assess the physical condition of the fuel lines themselves. Thus, visual inspections remain the most direct and practical approach to ensuring the integrity of fuel lines in this context.