How can one determine whether the water inside a pipe has been completely expelled by using compressed air? What instruments can be installed on the pipeline to allow for simple judgment
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How can one determine whether the water inside a pipe has been completely expelled by using compressed air? What instruments can be installed on pipelines to allow for simple assessment?
A flow meter or pressure gauge can be installed at the end of the pipeline to make a determination. When the flow rate indicated by the flow meter approaches zero, or when the pressure on the pressure gauge remains stable at a certain high value, it can be concluded that the water in the pipeline has been completely expelled. .
Looking at the pipe structure, generally speaking, once the gas has exited from the other side, the pipe becomes empty. Water will inevitably remain at the bottom of the pipeline; cleaning this part isn’t called depressurization – it’s called drying. A dew point meter can be used to detect the amount of water vapor in the gas
If you don’t dry the water as thoroughly, install a three-point combination to separate it and see； Strictly speaking, use a leak detector
First, the cleaning method must be customized based on the pipeline setup and the process requirements within the pipeline. Typically, drain valves are installed at the lowest points of the pipeline and at locations prone to water accumulation. If the pipeline can withstand a certain pressure, a burst-type purging method may also be considered. . . . . The key is what the qualification requirements for pipeline purging are. For stringent requirements, drying must be achieved by purging with dry gas; dew point analysis should be used to confirm whether it meets the specifications. In ordinary cases, one can only install a drain valve at the lowest point for future drainage purposes. It would be best to specify the exact setup and requirements of the pipeline for reference.
I would like to ask: at first, the drain valve discharges water, and after the pressure is increased to air, compressed air is discharged along with a small amount of water. Will this function of the drain valve be sufficient?
When installing a steam trap, a liquid level difference can be created to ensure proper drainage
Choose to install a mirror or a water flow indicator