How to clean the inner wall of seamless steel pipe?

Principle of ultrasonic cleaning: when ultrasonic wave propagates in the liquid, the sharp change of sound pressure causes the liquid to have strong air phenomenon, and millions of tiny cavitation bubbles are generated every second. These bubbles are generated rapidly under the action of sound pressure, and they are not continuously blasted violently, producing strong impact force and negative pressure suction, which is enough to make the stubborn dirt peel off quickly.

If the steel pipe is relatively long and has its own water tank, you can buy an ultrasonic vibration plate and put it into the water for ultrasonic cleaning. If it is not too long, you can use an ultrasonic vibration rod and insert it into the pipe for cleaning, and then wash the dirt stripped by ultrasonic with running water.