Hello, everyone. This issue of Xiaobian brings you new content. In production and use, we have a common language in one aspect of fire trench pipe fittings, that is, about the service life. In the process of affecting its life, there is a very important fatal factor

That is about the problem of corrosion failure. If the grooved pipe is corroded, its service life will be greatly reduced. That is to say, it can be used for 20 years, but now it is less than 10 years. If the elbow of grooved pipe is corroded, the pipe wall will become thinner, and even pits and pits will appear. We can use ultrasonic inspection method and flux leakage method for testing. Ultrasonic testing method mainly uses a specific probe to receive the reflected pulse from the inner surface of the pipe wall first, and then the reflected pulse from the outer surface of the pipe wall. The thickness of the pipe wall is the distance between the reflected pulse from the outer surface and the inner surface; The magnetic flux leakage method mainly uses the high permeability of ferromagnetic materials to magnetize the elbow by the effect of external magnetic field. If the elbow is corroded, the magnetic line will bend, and part of the magnetic force will leak out of the steel pipe surface. As long as there is overflow magnetic flux on the surface of the magnetized elbow, it can accurately know whether the elbow of grooved pipe fittings is corroded. If you have any questions or want to know more, you are welcome to leave a message for Xiaobian.