+86-311-85612775

+86-311-85329078

info@ypmachinery.com

 2-201,Fangda Tech Park ,No.266 Tianshan Street, Shijiazhuang

City,Hebei Province, China

 

Hebei Yunpeng Machinery is a leading enterprise

whose metal parts and duct fittings production.

CONTACT US

COPYRIGHT © 2018 Hebei Yunpeng Machinery Co., Ltd.
 
>
>
>
pressed bend can cause corrosion if used incorrectly
Company news
Industry news
web is updating and upgrading
Exhibition
Exhibition

pressed bend can cause corrosion if used incorrectly

Pressed bends can cause corrosion if not used properly. After the corrosion of the pressed bend, the wall of the pressed bend is usually thinned, and local pits and pits appear. Detection method after pressed bend corrosion: The basic principle of magnetic flux leakage detection is based on the basic characteristics of high permeability of ferromagnetic materials.

The permeability of the pressed bend corrosion defect is much smaller than that of the pressed bend, and the pressed bend is magnetized under the action of an external magnetic field. When the pressed bend has no defects, most of the magnetic lines of force pass through the steel pipe, and the magnetic lines of force are evenly distributed; when the pressed bend 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 presence of defects can be judged by detecting magnetic flux leakage escaping from the surface of the magnetized pressed bend.

pressed bend

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 inspection, the probe emits ultrasonic pulses perpendicular to the inner wall of the pressed bend. 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.