This article introduces a normal-pressured tubing cleaning technology by using circulating water as cleaning media, rotating brusher as paraffin removing device, and electromagnetic induction heating as auxiliary paraffin removing method.

This paper analyzes safety and environmental hazards of traditional tubing cleaning,and introduces tubing cleaning process of high pressure with medium frequency and its effect.

And the sewage recirculating and purified system in pipeline cleaning process and advantages of cleaning machine were described in partcular.

At present,the high-pressure water-jet flow cleaning machines were widely used in pipeline cleaning clean in big and medium cities.

And the recovery water may be used directly and the effect cleansing pipe fitting may measure up to state standard.

Research and application of the robot for air duct cleaning in China;

Presents some kinds of air duct cleaning equipment suitable for different air conditioning systems and the technology process of air duct cleaning.