1. Natural gas pipeline in operation: remove water, light oil, methane hydrate, iron oxide, carbide dust, carbon disulfide, hydrogen sulfuric acid and other corrosive substances inside the pipeline; reduce the corrosion damage of corrosive substances to the inner wall of the pipeline; Redefine the pipeline direction; detect pipeline deformation; check the intact rate of valves along the line; reduce the working back pressure.

2. Crude oil pipeline in operation: clean the pipeline before testing in the pipeline, intermittently run the pipeline to clean the pipeline at low throughput, remove condensate, wax, and scale inside the pipeline to achieve the purpose of reducing the back pressure of the oil transmission, reducing the friction resistance and the temperature of the oil transportation.

3. Chemical materials and edible oil pipelines: clean up pipelines with polymerizable materials, isolate different pipeline transmission media to realize single-tube multi-variety conveyance, and measure pipeline transmission media.