The inspection method with pressure sealing is a common testing method in engineering construction, which is used to check the sealing performance of pipelines, containers and equipment under working pressure. This method of inspection is mainly by applying pressure in the system, and then plugging and monitoring the system to determine whether there is leakage or other problems in the system. Below I will introduce the test method with pressure plugging in detail, including its principle, process, precautions, etc., in order to better understand and implement this test method.

### principle

The basic principle of the test method with pressure sealing is to use the sealing performance under the action of pressure, by applying a certain pressure, monitoring the pressure change in the system to determine whether there is a leak in the system. Before the inspection, it is necessary to ensure that the system has been installed and the sealing performance has reached a certain standard to ensure the accuracy of the inspection.

### Inspection process

#### 1. Make preparations

- Determine the specifications, materials and working pressure of the test object;

- Prepare pressure gauge, pressure sensor, pressure pump and other testing equipment;

- Check the sealing performance of the system to ensure that there are no obvious leakage points;

- Clean the inside of the system, ready for inspection.

#### 2. Apply pressure

- Use a pressure pump to exert a certain pressure inside the system, generally about 1.5 times the working pressure of the system;

- Observe the reading of the pressure gauge or pressure sensor to confirm that the pressure inside the system has reached the predetermined value.

#### 3. Block the devices

- When the pressure reaches a predetermined value, shut down the pressure pump and immediately block the inlet and outlet of the system to prevent pressure leakage;

- Sealing adhesive, sealing tape and other materials can be used for sealing to ensure the sealing performance of the system.

#### 4. Monitoring

- Monitor the pressure changes inside the system, generally within a certain time (such as 30 minutes, 1 hour, etc.) for multiple monitoring;

- If there is a significant drop in pressure or leakage inside the system, it indicates that there is a problem with the system and further overhaul is needed.

#### 5. Result determination

- According to monitoring data and pressure changes, determine whether the sealing performance of the system meets the requirements;

- If the system passes the inspection, it can be considered that the system is well sealed and can be put into use;

- If the system does not pass the inspection, it needs to find the leak and repair until it meets the required standard.

### Precautions

1. Before applying pressure, ensure that there are no personnel in the system to avoid injury due to accidents;

2. When sealing, select the appropriate sealing material and ensure that the sealing is firm;

3. Pay attention to protective measures during the monitoring process to avoid accidents caused by sudden release of pressure;

4. After the inspection, release the pressure in the system in time to avoid any impact on the system.

The test method with pressure sealing is a common testing method, which can effectively evaluate the sealing performance of the system and ensure the stable operation of the system. In the implementation of the inspection, it is necessary to strictly follow the process and pay attention to ensure the accuracy and reliability of the inspection results.

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