Pressure Sealing and Blocking refers to the use of specific materials and techniques to seal pipes, containers or equipment during construction and maintenance in order to stop the leakage of fluids or gases. With the development of industry and the improvement of environmental protection requirements, the demand for sealing with pressure is increasing. This paper will elaborate from the aspects of demand background, application field, plugging method and material selection.

First, the demand background

With the continuous development of industrial production, the frequency and scale of use of various types of pipes and containers are increasing. At the same time, the transportation and storage requirements of fluids and gases are becoming increasingly stringent. The demand background of the plugging process mainly includes the following aspects:

1. Stability requirements: In the process of industrial production, some media have a high hazard to the environment and the human body, such as toxic, flammable, explosive media. In order to prevent the occurrence of accidents, strict sealing measures are required for the transportation and storage equipment of these media to ensure that no leakage occurs.

2. Environmental protection requirements: With the improvement of environmental protection awareness, the control requirements for environmental pollution are becoming higher and higher. The plugging process can effectively prevent the leakage of harmful substances and protect the environment from pollution.

3. Maintenance and overhaul needs: In the process of equipment maintenance and overhaul, pipes or containers often need to be blocked to facilitate maintenance personnel to operate. The plugging process can improve maintenance efficiency and reduce downtime.

Pressure plugging is widely used in various industrial fields, mainly including the following aspects:

1. Petrochemical industry: oil, gas, chemicals, etc., need to be blocked in the production and transportation process to prevent leaks and accidents. For example, in oil well plugging, pipeline maintenance and equipment overhaul, pressure plugging technology is often required.

2. Power industry: In the process of power transmission, high-voltage cables and transmission lines often need to be blocked to ensure the normal operation of the power system. In addition, the maintenance and overhaul of electrical equipment also requires plugging work.

3. Steel industry: In the process of steel production, there are many high temperature and high pressure fluids and gases, which have high requirements for the sealing of equipment and pipelines. The plugging process can improve production efficiency and reduce energy consumption.

4. Urban construction: In the process of urban construction, municipal pipelines, sewage treatment plants, water supply systems, etc., often need to be blocked. Ensure the normal operation of urban infrastructure.

Third, plugging method

Pressure plugging mainly includes the following methods:

1. Mechanical plugging: Use special plugging equipment, such as pipe plugging, blind plate, etc., to plug pipes or containers. Mechanical plugging is suitable for small and medium diameter pipes and containers.

2. Sealing tape and glue: Use special sealing tape and glue to seal the joints of pipes or containers. Sealer tape and glue are suitable for all types of pipes and containers.

3. Sealing filler: Use special packing materials, such as rubber rings, gaskets, etc., to seal the interface of the pipeline or container. The sealing filler is suitable for high temperature and high pressure environment.

4. Plugging welding: Through the welding process, the interface of the pipeline or container is blocked. Sealing welding is suitable for high temperature, high pressure and corrosive media.

Fourth, material selection

The selection of materials with pressure sealing needs to consider the following factors:

1. Sealing performance: Select materials with good sealing performance to ensure the sealing effect. Commonly used materials include rubber, plastic, metal, etc.

2. Pressure resistance: Select materials that can withstand working pressure to prevent leakage due to high pressure. Commonly used materials include steel, stainless steel, copper and so on.

3. Corrosion resistance: Select corrosion resistant materials according to the corrosion properties of the medium to ensure the service life of the sealing material. Commonly used materials include fluorine plastics, stainless steel and so on.

4. High temperature resistance: For high temperature media, choose materials that can withstand high temperatures to prevent material failure due to high temperature. Commonly used materials include high temperature resistant tape, ceramics, etc.

In SUMMARY:

With the development of industry and the improvement of environmental protection requirements, the demand for sealing with pressure is increasing. Pressure plugging has been widely used in petrochemical, electric power, steel and urban construction. In the selection of sealing methods and materials, it is necessary to make a reasonable choice according to the specific situation to ensure the sealing effect and engineering stability.