Before the PE pipe production line is put into operation, it is necessary to carry out a pressure test. The pressure test includes strength test and water tightness test. It is generally recommended to use water as the test medium during the test. After removing the air in the test pipeline, increase the pressure to the required pressure value at a stable pressure increase rate. The pressure gauge should be placed as low as possible in the test section. The pressure test can be performed before or after the pipeline is backfilled. The pipeline is covered with soil at certain intervals, especially for the meandering pipeline, the pipeline should be fixed in place during the pressure test. Flange click-to-open link connections should be exposed for easy inspection for leaks.

The test pressure of the pressure test should not exceed 1.5 times the pressure level of the HDPE pipe or the lower pressure level fittings in the system. At the beginning, the pressure should be raised to the specified test pressure value and stay for a sufficient time to ensure that the pipe is fully expanded. A process takes 2-3 hours, when the system is stable, increase the pressure to 1.5 times the working pressure, stabilize the pressure for 1 hour, carefully observe the pressure gauge, and patrol along the line, if there is no visible leakage or occurrence during the test If there is a significant pressure drop, the pipe passes the pressure test.