Product Category
Buried oil tank quality inspection process
Date: Jul 03, 2020
1. Oil tank wall experiment
Carry out water filling experiments on newly built or repaired underground oil tanks, check whether the tank walls are tight, and check the appearance of the tank walls and welds.
2. Wall thickness detection of buried oil tank
The pressure vessel must be inspected and put into storage, and the above-ground oil tank is mainly selected by ultrasonic for detection, with higher power.
3. Check the tightness of kerosene. Welding seam has extremely strong penetration of kerosene. Apply kerosene to the weld on the wall of the oil tank to check the tightness. Remove the dirt, apply white powder emulsion, spray kerosene on the welding seam on the other side of the pressure vessel after dryness, such as after 12 o'clock spraying of kerosene (the time can be extended under low temperature), the surface of the white welding seam is not mottled , The weld of the oil tank meets the requirements.
4. Tank bottom detection
Magnetic leakage scanning skills to detect the corrosion of the bottom plate of the oil tank (such as corrosion depth and area, crack length, etc.). The detection principle of this instrument is: the magnetic flux leakage scanner detects the bottom of the oil tank. When the bottom of the oil tank is defective, the magnetic field distribution will change and the sensor can detect it. The defect is that some areas will be missed and cannot be inspected completely facing the bottom of the tank. The bottom of the oil tank is free of debris and boring during inspection. Others can also inject helium gas into the bottom of the oil tank to detect the leakage point of the bottom of the tank. 
5. Welding seam detection of buried oil tank bottom plate
When the vacuum leak test method tightly detects the bottom plate, apply soapy water to the weld of the oil tank and cover the vacuum box for investigation.
6. Measure the bottom pressure of the buried oil tank and calculate the weight of the medium in the tank for oil tank leakage detection. If the quality continues to decrease, then the seizure leak is clarified.
7. After detecting the change of the oil volume in the oil tank to complete the leak detection, this method is not easy to find small leaks.
Carry out water filling experiments on newly built or repaired underground oil tanks, check whether the tank walls are tight, and check the appearance of the tank walls and welds.
2. Wall thickness detection of buried oil tank
The pressure vessel must be inspected and put into storage, and the above-ground oil tank is mainly selected by ultrasonic for detection, with higher power.
3. Check the tightness of kerosene. Welding seam has extremely strong penetration of kerosene. Apply kerosene to the weld on the wall of the oil tank to check the tightness. Remove the dirt, apply white powder emulsion, spray kerosene on the welding seam on the other side of the pressure vessel after dryness, such as after 12 o'clock spraying of kerosene (the time can be extended under low temperature), the surface of the white welding seam is not mottled , The weld of the oil tank meets the requirements.
4. Tank bottom detection
Magnetic leakage scanning skills to detect the corrosion of the bottom plate of the oil tank (such as corrosion depth and area, crack length, etc.). The detection principle of this instrument is: the magnetic flux leakage scanner detects the bottom of the oil tank. When the bottom of the oil tank is defective, the magnetic field distribution will change and the sensor can detect it. The defect is that some areas will be missed and cannot be inspected completely facing the bottom of the tank. The bottom of the oil tank is free of debris and boring during inspection. Others can also inject helium gas into the bottom of the oil tank to detect the leakage point of the bottom of the tank.
When the vacuum leak test method tightly detects the bottom plate, apply soapy water to the weld of the oil tank and cover the vacuum box for investigation.
6. Measure the bottom pressure of the buried oil tank and calculate the weight of the medium in the tank for oil tank leakage detection. If the quality continues to decrease, then the seizure leak is clarified.
7. After detecting the change of the oil volume in the oil tank to complete the leak detection, this method is not easy to find small leaks.
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