Pressure plugging is a common process used to plug and repair pipes and equipment in the industrial process. It is to apply a certain pressure in the pipeline or equipment to prevent the flow of fluid or gas, so as to achieve the purpose of plugging and repair. In this paper, the process principle, application scope, operation steps and precautions of sealing with pressure are introduced in detail.

First, the process principle

The process principle of sealing with pressure is mainly based on the knowledge of fluid mechanics and material mechanics. When pipelines or equipment leak or need to be repaired, in order to avoid stopping production and reduce stability risks, temporary plugging and repair can be achieved by means of pressure plugging. The specific principles are as follows:

1. Pressure control principle: By increasing the pressure inside the pipeline or equipment, the leakage of fluid or gas can be effectively prevented. During the sealing process, ensure that the pressure applied can resist the pressure inside the pipe or device to achieve the sealing effect.

2. Sealing material selection principle: Choosing the right sealing material is the key to the sealing process with pressure. Commonly used sealing materials include tape, hose, sealing paste and so on. These materials have good sealing and pressure resistance, and can effectively plug the leak point of the pipeline or equipment.

3. Sealing position determination principle: When sealing with pressure, determine the sealing position. It is usually possible to determine the plugging position by detecting the leak point or using the process drawings to ensure that the plugging material can completely cover the leak point, so as to achieve effective plugging.

2. Scope of application

The pressure sealing process is suitable for a variety of scenarios, especially in industrial production. Here are some common areas of application:

1. Pipeline leakage sealing: When the pipeline leaks, the leak point can be temporarily blocked by pressure sealing to avoid the stability risk and production loss caused by fluid leakage.

2. Equipment repair plugging: In the process of equipment maintenance, in order to avoid stopping production and reduce maintenance time, the process with pressure plugging can be used to temporarily plug the equipment for maintenance and replacement of parts.

3. Process pipeline switching: In the industrial production process, it is sometimes necessary to switch the fluid or gas from one pipeline to another. The pressure sealing process can block one of the pipes during the switching process to ensure switching and efficiency.

3. Operation steps

The operation steps with pressure plugging can be simplified into the following key steps:

1. Prepare for stability: Before plugging with pressure, check the working area to ensure the working environment. At the same time, prepare the required plugging materials and tools.

2. Pressure control: According to the actual situation, choose the right pressure source and apply the appropriate pressure. Before applying pressure, it is necessary to ensure that the inside of the pipe or equipment has been emptied to stop the pressure from harming the operator.

3. Prepare sealing materials: Select appropriate sealing materials based on the location and size of the sealing. The sealing material should have good sealing and pressure resistance.

4. Sealing operation: Place the sealing material in the position that needs to be sealed, and apply the appropriate force according to the actual situation to ensure that the material can completely cover the leak point and seal tightly.

5. Detection and verification: After plugging is completed, test and verification are carried out to ensure good plugging effect. If necessary, you can also perform pressure tests and other operations to ensure the reliability of the plug.

Four, stability precautions

When performing the sealing process with pressure, the following stability matters need to be noted:

1. Stability protection: The operator should wear appropriate personal protective equipment, such as gloves, goggles, protective clothing, etc., to prevent the plugging material from harming the body.

2. Pressure control: When applying pressure, ensure that the pressure source matches the pressure resistance of the pipeline or equipment to avoid excessive or too small pressure resulting in stability hazards.

3. Sealing material selection: Select the appropriate sealing material to ensure that it has good sealing and pressure resistance to prevent the failure of the sealing material from causing leakage.

4. Detection and verification: After plugging is completed, testing and verification should be carried out to ensure good plugging effect and avoid accidents caused by incomplete plugging.

In SUMMARY:

Pressure sealing process is a common method of pipeline sealing and repair. By applying pressure and using sealing materials, the leakage point of pipeline or equipment can be effectively blocked to achieve the purpose of temporary sealing and repair. In the process of sealing with pressure, it is necessary to pay attention to protection, pressure control, sealing material selection and detection and verification to ensure the effectiveness of the operation.