How to fix leaks in the oil tank bottom plate
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Leakage from the bottom floor of the gasoline tank. Details of the leakage: The tank is 16 meters tall; initially, gasoline began to seep out from the bottom floor when the liquid level in the tank exceeded 10 meters, and later, gasoline started leaking when the liquid level surpassed 6 meters. Solution: Empty the oil tank, clean the oil inside it, and remove the paint from the welds on the side of the tank where there is leakage. First, visually inspect the welds to identify any defects from the welding process and mark them. Then, conduct a vacuum test on those defective areas using a vacuum chamber; no leaks were detected. Subsequently, another vacuum test was carried out on those welds at a vacuum level of -0.005 MPa, and still no leaks were found. Are there any other better methods to locate leaks? I seek advice from experts!
Use colored flaw detection first, as it allows inspection over large areas.
Hello, have you handled similar cases before?
Leakage at the bottom of the tank is a serious quality issue, and dealing with it properly can be very troublesome. The \"Leak Repair Plan\" needs to be carefully reviewed.
Surface non-destructive testing and vacuum chamber leak detection tests, when carried out properly, will definitely detect any leaks!
Performing magnetic flux leakage testing on the bottom plate is a thorough and fast method, but it’s necessary to remove all rust first
Over time, oil tanks often experience leaks in their bottom plates; if the leakage is caused by thinning of the plate, it is recommended to replace the bottom plate.
Hello, do you have any experience with handling similar situations?
We once encountered a case where a tank leaked just half a year after it was cleaned; now we test all tanks that we open. Pay attention to the position of the floating pad legs; last time, there were holes under the shims.
For the bottom plate vacuum chamber method, the negative pressure should be no less than 53 KPa, that is, -0.053 mPA. The pressure used in the leak detection test carried out by the original poster is way too low