Test radiator! ! What do you mean a few times?

The radiator pressure test is to fill the heater with water or air, and "several pressures" refers to the reading of water pressure/air pressure.

After the radiator and pipeline are installed, they should be tested to see whether the connection is stable and whether there is water leakage. Avoid leakage in use, and damage the floor, furniture, walls and other properties of users' homes.

The test method is usually to inject a certain amount of water or air into the radiator and pipeline with special equipment and observe the reading of the pressure gauge. Usually, the pressure is 0.6-0.8mpa, and it will not drop to 0 within 24 hours, indicating that the system is in good condition and has no leakage.

The test pressure is 1.5 times of the maximum possible working pressure (usually 8- 10 kg water pressure). If the pipeline is connected to the PVC joint, the pressure test can only be carried out after the PVC joint is connected for about 5 hours, and the maximum pressure shall not exceed 6 kg.

The pressure measuring and pressure maintaining time of PP-R water pipe is generally 30 minutes. For example, if the whole system is blocked and there is no water leakage, it is normal for the pressure pointer to drop to 0.5 kg.

The reason is the pressure expansion inside the pipeline, but for the sake of safety, the whole pipeline system must be re-inspected. Note: it is forbidden to pressurize with electric pump.

Extended data:

1, precautions for radiator pressure test

Non-household heating users: generally in non-household heating residential buildings, residents on the top floor should close the exhaust valve on the top floor before heating test; After testing the water, the top floor residents should cooperate with the heating unit and use the top floor exhaust valve to exhaust the air in the heating pipeline of the whole building.

Users of household heating: After seeing the notice of water test posted by the heating unit, all the air release valves of the heating in the home should be closed to avoid water seepage. After the heating is filled with water, residents should check the exhaust situation at home, that is, open the air valve to let the air out of the heating pipe, and then see if the closing and opening functions of the valve are in good condition.

During the heating period, residents who go to other places for business or are away from home for a long time must inform the heating department or the residential property, and do not suppress the water test.

2. Possible causes of radiator leakage

First, the radiator is used for a long time, and the internal corrosion causes the radiator to leak, which leads to the radiator leaking;

Second, the joint between the radiator and the valve is not sealed enough, or the pipe quality is unqualified and leaks;

Third, the radiator leaks due to the principle of thermal expansion and cold contraction. After hot water is injected, some radiators with poor quality burst and leak under pressure;

Fourth, after stopping heating every year, the water in the radiator will be drained, some cracks sealed by sediment will be exposed, and leakage will occur when refilling water;

Reason 5: When heating suppresses water testing, residents forget to close the air valve when opening it, or connect the heating device privately and change it, resulting in water leakage.

References:

Baidu encyclopedia-inhibition test