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The first proposal for international standards for magnetic flux leakage detection proposed by my country was successfully approved and received support from many countries including Italy, Brazil, Argentina and South Korea.

Magnetic leakage testing is used to detect the maintenance and management of pipelines, ensuring their safety and reliability.

The magnetic flux leakage detection method can effectively detect defects on the surface, near-surface and inside of ferromagnetic materials, and is low-cost and easy to implement automation, so it is widely used in steel pipe inspection.

The main detection principle of magnetic leakage detection method is to magnetize the workpiece (close to saturation) to give it a certain magnetic flux density, so as to generate a leakage magnetic field at discontinuous points. The magnetic field sensor sends the output signal to the operating amplifier.

Non destructive testing is a widely used method in pipeline inspection. It tests and inspects the quality and characteristics of materials without damaging the pipeline itself.

Magnetic flux leakage testing has the following advantages: it is easy to implement automation, has high detection reliability, and can achieve preliminary evaluation of defects with high efficiency and pollution-free characteristics.

Magnetic flux leakage testing refers to the use of magnetic traces to display defects in ferromagnetic materials and their products.Magnetic flux leakage testing: Magnetic particle testing can detect small defects that are exposed on the surface and cannot be directly observed with the naked eye or with the help of a magnifying glass. It can also detect near surface defects that are not exposed but buried a few millimeters below the surface.

Magnetic flux leakage testing (MFL) is a non-destructive testing technique that detects defects by detecting magnetic leakage fields. When magnetizing the measured ferromagnetic material with a magnetic saturator, if the material is continuous and uniform, the magnetic induction lines in the material will be constrained within the material.