Method of water pressure test for pe water supply pipe



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 pe water supply pipeThe hydraulic pressure test has passed the installation and acceptance of pe water supply pipes in each pipe section. The pressure test can only be carried out in l2m long pipe sections on both sides of elbows and tee joints, and can be carried out when returning to soil 5cm above the pipe top. In order to prevent pipeline displacement, the pipeline pressure test standard of pe water supply pipeline project is 0.8Mpa. After the pressure is stable, check the interface, the pipe body is free of damage and water leakage, and the pipeline strength test is qualified.

during the pressure test of pe water supply pipe, use the fire hydrant to inject water at the low point through the fire isolation belt, and adjust the total water consumption according to the necessary length. At the beginning of water injection, first open the exhaust valve, and then close the water injection valve and exhaust valve after the outlet of the exhaust valve for initial pressure test. After the test section is filled with water, keep the positive water pressure for full immersion, and soak for no less than 12 hours, and check whether there is leakage at the joint.

At the initial stage of pressing, the pressure rises slowly, and the test is carried out once every 0.2Mpa, and when it is close to 0.5Mpa, the safety test is carried out for a period of time. Open the exhaust valve to exhaust, then hold it to 0.6Mpa, and keep the test pressure constant for 10 minutes before the test. Every time the pressure is boosted, the pipeline must be checked, and the next pressure suppression can only be continued after there is no problem.

When the pressure is released, the test pressure is reduced to 0.7Mpa, and when the water is released, the exhaust valve is opened at the same time. Drain water to the drainage point, if no water is found, calculate the drainage. According to construction requirements, pressing takes 1-2 days. The back should be placed on undisturbed soil or artificial back; When the soil is soft, square wood should be placed in front of the back of the original soil, leveling and compacting, so that the back is stable as a whole.

The elbow, tee and other pipe fittings shall be anchored, and the fork shall be closed tightly to prevent water seepage. test pe water supply pipe does not allow the use of gate valve as a blocking plate, no fire hydrant, water hammer eliminator, safety valve and other accessories. During the test, the valve is fully open.