▎ 摘　　要

NOVELTY - Cleaning steel pipes involves using high-pressure gas pulse to flush the cleaning liquid into the pipeline to be cleaned, and introducing ultrasonic waves. The pressure of the cleaning liquid is 1.0-3.5 megapascal, the temperature is 30-50 degrees C, and the flow rate is 3-15 m/second. The rinsing liquid or a gas-liquid mixture of rinsing liquid and compressed gas are injected into the pipeline. The hot gas is passed into the pipeline, and the temperature is raised inside the pipeline to 90-160 degrees C. The compressed gas is passed with a temperature of 80-120 degrees C into the pipeline to obtain the cleaned steel pipe. USE - Method for cleaning steel pipes. ADVANTAGE - The cleaning method has better cleaning effect, less cleaning times, low cleaning cost, and can solve the problem of cleaning metal oxides and grease on the inner wall of small-caliber steel pipes.