Can the water pipe be pressed twice?

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Water pipes are also used when we are renovating. In order to use them more conveniently in the future, we must also understand the knowledge of water pipes. Otherwise, some troubles will easily occur. During construction, we must do it. it is good. Let ’s find out if the water pipe can be pressed twice? What is the test procedure for water pipe compression test? Friends who want to know take a look together, I hope to help everyone. Can the water pipe be pressed twice? The water pipe is pressurized, and the pressure increase test is generally performed under the condition of 1.5 times the water pressure. There should be no water leakage during the test. There is a simple test method without pressure, but it is not completely feasible. Close all valves that use water and check the water meter readings. After 20 minutes, if there is no change in the water meter readings, there will be no leakage. Conversely, if the water meter readings become large, the water leaks. However, if there is a problem with the water meter or the water pipe is slightly leaking, it may be difficult to determine. Therefore, it is recommended that a hydraulic pressure test experiment be performed after construction. Generally, the pressure is 10-15 kg, and the time is 20-30 minutes. It is best to see it in person. What is the test procedure for water pipe compression test 1. Water pipe pressure test tool preparation: It is a commonly used relatively simple pressure test tool, its size is 30cm square, but it is still very effective. The tool includes jacks, pressure gauges, water tanks, and connecting hoses. The pressure gauges used are specifically designed to test the strength of the pressure in the water pipe. 2. Water pipe pressure test pressure measurement method: its use method is to connect the hot and cold water pipes with a hose. The hot and cold water forms a circle and forms a tube. The pressure tester can be connected to any water outlet. The pressure pointer is 0 pressure. The pressure test can only be performed after all the water pipe paths have been welded. Before the pressure measurement, all plugs must be blocked and the valves of the water inlet manifold must be closed. When measuring pressure, shake the pressure lever of the jack until the pointer of the pressure gauge points to about 0.9-1. 0, that is to say, the current pressure is three times the normal water pressure and maintain this pressure value for a certain time. The difference is that the pressure measurement time of the water pipe is different. The welded pipe of PPR, aluminum-plastic PPR, steel-plastic PPR, etc. is 30 minutes. Aluminum plastic pipe is the kind of copper joint, and its time is 4 hours (half working day). Galvanized pipe is 4 hours and half a working day. 3. Judging the results of the water pipe compression test: During the pressure test, check the joints and inner wire joints one by one. There should be no water seepage in the plug. Some people say that the plug seepage is okay. The needle of the pressure tester, the needle is constantly falling. Who knows whether the place is checked carefully? The pressure gauge does not drop the needle in the specified time or the amplitude of the decline is less than 0.1, which indicates that the water pipe is good, and it also shows that the pressure gauge is in normal working state. The above-mentioned matters related to water pipe compression are introduced here. Here is a friendly reminder: After installing the water pipe, it must be tested. The test pressure of the metal and its composite pipe is 0.6 MPa, and the pressure is kept for 10 minutes. If it is greater than 0.02MPa, there is no leakage; the test pressure of the plastic pipe is 0.8MPa, and the pressure is maintained for 20 minutes, and the pressure drop in the pipe should not be greater than 0.05MPa without leakage. The article introduced above mainly tells you all the knowledge about whether the water pipe can be pressed twice. What is the test procedure of the water pipe pressure test? I hope it can help everyone. When we install water pipes, we must have a certain understanding of the water pipes to be able to better install and use them. Otherwise, if we do not properly install them, it will affect future use and the probability of trouble will be even higher