How to detect the sealing of Steel fuel tank - SUMAC Auto Recycling Equipment Co.,Ltd

Here are some common methods to detect the sealing performance of a steel fuel tank:

Pressure Test

This is a widely used method. First, seal the fuel tank's openings and then connect it to a pressure - generating device. Gradually increase the pressure inside the tank to a specified value, usually slightly higher than the normal operating pressure. Then, observe the pressure gauge. If the pressure remains stable within a certain period, it indicates that the tank has good sealing performance. If the pressure drops significantly, there may be leaks. After the test, release the pressure slowly to avoid damage to the tank.

Vacuum Test

In this test, the fuel tank is placed in a vacuum chamber. The air inside the tank is pumped out to create a vacuum environment. Then, check for any signs of air leakage into the tank. This can be done by observing if there are bubbles forming in a liquid - filled area around the tank (if the tank is partially submerged in a liquid), or by using a vacuum - sensitive detector to detect any changes in the vacuum level. If air enters the tank, it means there is a leak in the seal.

Dye Penetrant Test

This method is suitable for detecting small leaks. First, clean the surface of the fuel tank thoroughly. Then, apply a dye - penetrant liquid evenly on the outer surface of the tank. The penetrant can seep into any cracks or pores. After a certain period, wipe off the excess penetrant and apply a developer. The developer will draw out the penetrant in the cracks, making them visible. If there are any colored lines or spots on the surface, it indicates the presence of leaks.

Ultrasonic Testing

Ultrasonic waves are used to detect leaks in this method. An ultrasonic transducer is placed on the surface of the fuel tank. It emits ultrasonic waves and receives the reflected waves. If there is a leak, the ultrasonic waves will be affected, and the transducer can detect the changes. This method is non - destructive and can detect even very small leaks, but it requires professional equipment and trained operators.