Which method can measure socket flange corrosion

　　The use of socket flange in industrial structural parts mainly improves the function of connection and keeps the sealing of pipelines leak-free. However, many socket flange will have their own corrosion aging after a period of time, thus losing the effect of sealing. Therefore, it is necessary to regularly test the socket flange for corrosion protection.

　　The socket flange should be maintained and inspected regularly. After corrosion, the pipe wall of the ANSI B16.5 SS 316 CL300 RF Socket Flange becomes thinner and local pits and pits appear. The causes and modes of internal corrosion of stainless steel socket flange need to be carried out in accordance with certain ways and principles. Flux leakage method and ultrasonic detection method are widely used in socket flange corrosion detection at home and abroad.

　　The ultrasonic method is to measure the thickness of corroded pipe wall by using the principle of pulse reflection of ultrasonic wave. The basic principle of magnetic flux leakage method is based on the high permeability of ferromagnetic materials. The permeability of socket flange corrosion defect is far less than that of socket flange. The socket flange is magnetized under the action of external magnetic field. When there is no flange defect, most of the magnetic lines pass through the steel pipe, and then the magnetic lines are evenly distributed. When there are defects in the socket flange, the magnetic lines occur. Bending, and some of the magnetic lines leak out of the surface of the steel pipe. The defect can be judged by detecting the leakage flux escaped from the surface of the magnetized socket flange.

　　In addition, the probe emits ultrasonic pulse vertically to the inner wall of the socket flange. The probe first receives the reflected pulse from the inner surface of the tube wall, and then the ultrasonic probe receives the reflected pulse from the outer surface of the tube wall. The distance between the reflected pulse and the inner surface reflects the thickness of the tube wall. Elbow in the actual detection needs to be carried out according to the actual situation and instructions, according to the ultrasonic method can test a good way.

　　The ultrasonic testing method is also suitable for thickness measurement and metal properties measurement of other metal structures.