1. Visual inspection
The visual inspection of the three-oil and five-cloth anticorrosive steel pipe is a simple and intuitive detection method. When performing visual inspection, it is necessary to carefully observe whether there are unevenness on the surface of the pipe body, and whether there are obvious defects such as bubbles, wrinkles, and sand holes. In addition, it is necessary to check whether the thickness of the pipe body is uniform, whether there are problems at the joints, etc.
2. Magnetic particle flaw detection
Magnetic particle testing is a commonly used non-destructive testing method, which can be used to detect external surface or internal defects of anti-corrosion steel pipes. When performing magnetic particle testing, it is necessary to coat iron powder or magnetic powder on the outer surface or inside of the test tube, and then apply a constant magnetic field during the test process to observe whether there are cracks, bubbles and other defects on the surface or inside the tube body.
3. X-ray detection
X-ray inspection is a very effective non-destructive testing method, which can find defects inside anti-corrosion steel pipes, such as uneven material distribution, cracks and other problems. When performing X-ray inspection, a specialized X-ray machine is required to pass through the defects on the surface of the X-ray picture tube. Due to the radioactive nature of X-rays, it is necessary to pay attention to protective measures when performing X-ray inspection.
4. Hydrostatic test
The hydrostatic test is a commonly used hydrostatic test, which can test the tightness and pressure resistance of the anti-corrosion steel pipe with three oils and five cloths. When carrying out the hydrostatic test, it is necessary to place the test tube in the water tank, and then use a water pump or air press to increase the liquid or gas pressure in the pipe to a certain value, observe whether there is leakage and deformation, and ensure the pressure resistance of the pipe body.