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Pressed ventilation elbow products can corrode if used improperly
Release time:
Aug 03,2022
Pressed ventilation elbow products can cause corrosion if used improperly. After the corrosion of Pressed ventilation elbow products, the pipe wall of Pressed ventilation elbow products usually becomes thinner, and local pits and pits appear.
Pressed ventilation elbow products can cause corrosion if used improperly. After the corrosion of Pressed ventilation elbow products, the pipe wall of Pressed ventilation elbow products usually becomes thinner, and local pits and pits appear. Detection method after corrosion of Pressed ventilation elbow products: The basic principle of magnetic flux leakage detection is based on the basic characteristics of high magnetic permeability of ferromagnetic materials.
The magnetic permeability of the corrosion defect of the Pressed ventilation elbow products is much smaller than that of the Pressed ventilation elbow products, and the Pressed ventilation elbow products are magnetized under the action of the external magnetic field. When there is no defect in the Pressed ventilation elbow products, most of the magnetic force lines pass through the steel pipe, and the magnetic force lines are evenly distributed; when the Pressed ventilation elbow products are defective, the magnetic force lines bend and some of the magnetic force lines leak from the surface of the steel pipe. The presence of defects can be judged by detecting magnetic flux leakage escaping from the surface of magnetized Pressed ventilation elbow products. The ultrasonic testing method uses the pulse reflection principle of ultrasonic waves to measure the thickness of the corroded pipe wall. This process adopts the method of self-propagating centrifugal casting, which mainly uses the chemical reaction of the substance itself to generate high temperature through exothermic combustion, and synthesize new substances during the propagation of combustion waves. During the detection process, the probe emits ultrasonic pulses perpendicular to the inner wall of the Pressed ventilation elbow products. The probe first receives the reflected pulse from the inner surface of the pipe wall, and then the ultrasonic probe receives the reflected pulse from the outer surface of the pipe wall. The distance between this pulse and the pulse reflected from the inner surface reflects the thickness of the tube wall.
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