How to do the Pressure Test of the Seamless Water Pipe?

Water pipe pressure measurement is required before or after waterway construction. So how to do pressure test for seamless water pipe?

1. Block all the plugs of the seamless water pipe, install the air release valve at the highest point of the pipeline system, and install the drain valve at the lowest point; Fill the pipe with water, and close the vent valve after the pipe is full of water.

2. In the next step, we will first check whether there is water leakage in the water pipe, and then gradually increase the pipe pressure. increase to the test pressure. Usually the test pressure of the cold water pipe is 1.5 times the design pressure, but not less than 0.9MPa; the test pressure of the hot water pipe is 2 times the design pressure, but not less than 1.2MPa. After stabilizing the pressure for 10 minutes, reduce the pressure to the design pressure and stop the pressure for 30 minutes. If there is no leakage in the water pipe and the pressure does not drop, it is qualified.

3. When we increase the pressure to one-half or three-quarters of the test pressure, we must conduct a comprehensive inspection of the pipeline system. If there is no abnormality, we can continue to increase the pressure. If there is water seepage in the water pipe, we must first release the pressure and then repair the leak. repaired. After the test is over, remove the expansion joints and other facilities to drain the accumulated water in the duct system.

4. If the water pipe is hot-melt connected, the hydraulic test can only be carried out 24 hours after the pipe is installed and the appearance inspection is qualified. When you conduct a water pressure test, there must be no air in the water pipes, and inferior water meters cannot be used. If the pressure drops rapidly during the water pipe pressure measurement, it may be because the water pipe plug is not blocked properly.

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