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How to Properly Clean Concrete Pump Pipes After Pumping
Release time:
2026-09-03
Data source:
After concrete placement is complete, any remaining concrete in the pump pipes must be cleaned out promptly. How should this cleaning be done?
After concrete placement is complete, any remaining concrete in the pump pipes must be cleaned out promptly. How should this cleaning be done?
What preparations are required before cleaning concrete pump pipes?
Answer: Ideally, pump 0.5 to 1 cubic meter of mortar and discharge it completely. Then, stop the machine, operate the valve switch, and release the pressure from the accumulator.
What are the methods for cleaning the pipes?
Answer: Water cleaning and air cleaning. Regardless of the method used, the valve box and the hopper must be thoroughly cleaned.
What are the steps for water cleaning?
Answer: First, insert a water-soaked cement bag (rolled into a cylindrical shape) and a cleaning ball into the cleaned reducer pipe. Connect the reducer and the pipeline, close the discharge gate, fill the hopper with water, and ensure a continuous water supply. Pump the water until the cleaning ball emerges from the discharge end of the concrete pump pipe.
What is the specific procedure for air cleaning?
Answer: Air cleaning involves using compressed air to blow out the line. First, insert a water-soaked cleaning ball into the air-cleaning adapter, then connect it to the first straight pipe attached to the reducer. Attach a safety cap to the end of the pipeline, ensuring the cap's opening faces downward. Limit the compressed air pressure to no more than 0.8 MPa; open the air valve slowly, increasing the flow only when the concrete begins to discharge smoothly. Close the air valve immediately after the process is complete. Water cleaning requires a tight clearance between the cutting ring and the wear plate, as well as an abundant water supply, to strictly prevent water behind the cleaning ball from seeping forward.
What precautions should be taken for water and air cleaning?
Answer: Towards the end of the water cleaning process, ensure that water from the pipeline does not flow onto the concrete pouring site, as this could compromise the concrete's quality. This method is simple, relatively low-risk, and commonly used. Air cleaning requires an air compressor and strict adherence to operating procedures; the pipeline must be well-sealed. Since the cleaning range is limited, long-distance lines may need to be cleaned in sections. This method requires caution and carries a higher risk; therefore, personnel must stay clear of the discharge end to prevent injury from flying aggregates or the cleaning ball.
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