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Corrosion may occur if quality Pressed ventilation elbow is improperly used
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Corrosion may occur if quality Pressed ventilation elbow is improperly used

If used improperly, quality Pressed ventilation elbow can lead to corrosion. After the quality Pressed ventilation elbow is corroded, the pipe wall of the quality Pressed ventilation elbow usually becomes thinner, and local pits and pits appear. Quality Pressed ventilation elbow detection method after corrosion: The basic principle of magnetic flux leakage detection is based on the basic characteristics of high permeability of ferromagnetic materials.

quality Pressed ventilation elbow

The magnetic permeability of the corrosion defect of the quality Pressed ventilation elbow is much smaller than that of the quality Pressed ventilation elbow, and the elbow is magnetized under the action of the external magnetic field. When the quality Pressed ventilation elbow is free of defects, most of the magnetic lines of force pass through the steel pipe, and the magnetic lines of force are evenly distributed; when the elbow is defective, the magnetic lines of force are bent, and some of the magnetic lines of force leak from the surface of the steel pipe. The existence of defects can be judged by detecting the magnetic flux leakage escaping from the surface of the magnetized quality Pressed ventilation elbow. 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 quality Pressed ventilation elbow. 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.

Maintenance method of quality Pressed ventilation elbow: The bolts of the elbow valve packing gland should be tightened evenly, and should not be pressed into a bent state, so as to avoid collision, hinder the movement of the valve stem or cause leakage. The elbow should be a hand wheel, do not use levers or other tools to avoid damage to the valve parts. Clockwise rotation of the handwheel is closed, otherwise it is open.

The quality Pressed ventilation elbow stored for a long time should be inspected regularly. Exposed machined surfaces should always be kept clean and free of dirt. They should be neatly stored indoors in a ventilated and dry place. It is strictly forbidden to stack or store in the open air.