How to suppress geothermal pipes
The pressure of geothermal pipes is an important step in the installation of floor heating systems. Pressure testing can ensure the sealing and pressure-bearing capacity of the pipeline system and avoid problems such as water leakage in later use. This article will introduce in detail the steps, precautions and solutions to common problems of floor heating pipes to help you better complete the installation and acceptance of the floor heating system.
1. Basic steps for suppressing geothermal pipes
Geothermal pipe pressing is usually divided into the following steps:
| steps | Operation content | Things to note |
|---|---|---|
| 1. Preparation | Check that the pipe connections are tight and make sure all valves are closed. | Avoid water leakage due to loose connections during the pressing process. |
| 2. Water injection and exhaust | Fill the pipe with water and open the exhaust valve to discharge the air. | Make sure there is no air left in the pipe to avoid pressure instability. |
| 3. Pressure test | Use a pressure pump to increase the pressure to 1.5 times the working pressure (usually 0.6-0.8MPa). | The pressurization process needs to be slow to avoid sudden pressure increases that damage the pipeline. |
| 4. Maintain pressure and observe | Maintain the pressure for 24 hours and observe changes in the pressure gauge. | If the pressure drop does not exceed 0.05MPa, it is qualified. |
| 5.Acceptance record | Record the suppression data and fill in the acceptance report. | Ensure the data is authentic and facilitate later maintenance. |
2. Precautions for suppressing geothermal pipes
1.Choose the right pressing equipment: The pressure range of the pressure pump needs to cover the working pressure of the geothermal pipe. Usually, an electric or manual pressure pump of 0-1MPa is selected.
2.Effect of ambient temperature: During winter construction, please note that when the ambient temperature is below 5°C, the pressure water may freeze. It is recommended to use antifreeze or choose a period with higher temperatures for testing.
3.Segmented suppression: For large-area floor heating systems, it is recommended to suppress the test in sections to avoid local problems affecting the overall test results.
4.Accuracy of pressure gauge: Make sure the pressure gauge is calibrated to avoid misjudgment due to instrument errors.
3. Common problems and solutions
| question | Possible reasons | Solution |
|---|---|---|
| Rapid pressure drop | Leaking pipe connections or damaged pipes. | Check the pipe joints and hidden parts, repair leaks and repressurize. |
| Large pressure fluctuations | Air remains in the pipe. | Refill water and exhaust to ensure there is no air in the pipe. |
| The pressure cannot rise | The pressure pump is faulty or the valve is not closed. | Check the status of the pressure pump and valve, and continue testing after troubleshooting. |
4. Acceptance standards for geothermal pipe suppression
According to the "Technical Regulations for Ground Radiant Heating" (JGJ 142-2012), the acceptance standards for geothermal pipe suppression are as follows:
| Project | Standard requirements |
|---|---|
| Test pressure | Not less than 1.5 times the working pressure, and ≥0.6MPa. |
| Holding time | 24 hours. |
| pressure drop | ≤0.05MPa. |
| Pipe appearance | No leakage or deformation. |
5. Summary
The pressure of geothermal pipes is a key link that cannot be ignored in the installation of floor heating systems. The sealing and safety of the pipes can be ensured through standardized pressure tests. During the construction process, it is necessary to strictly follow the steps, pay attention to environmental factors and equipment status, and deal with problems in a timely manner if any problems are found. During acceptance, it is necessary to check whether the data meets the standards to ensure long-term stable operation of the system.
If you still have questions about the pressure of floor heating pipes, it is recommended to consult a professional floor heating installer or refer to the relevant technical specifications for more detailed guidance.
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