Pressure plugging is a technique that encloses a fluid or gas in a container or pipe to stop a leak or control the flow of fluid. There are a variety of common pressure sealing methods and technologies in various fields and industries. Below I will describe in detail several common pressure sealing methods.

1. Rubber or elastic O-ring sealing:

This is a common sealing method with pressure, which is suitable for the sealing and sealing of pipes, containers and other equipment. The rubber or elastic O-ring is used as a sealing gasket, which is compressed by pressure to achieve the sealing effect. This plugging method is widely used in water treatment, petrochemical, pharmaceutical and other industries.

2. Expansion plugging:

Expansion plugging is a method of plugging pipes or equipment using an expansive material. Common expansion sealing materials include rubber, silicone, etc., by placing it inside the pipeline or equipment, and then by injecting liquid or gas to expand the material and fill the space of the pipeline or equipment to achieve sealing. This type of closure is often used to prevent leaks, clogging of pipes or defects in equipment.

3. Welding sealing:

Welding plugging is a kind of technology that realizes plugging by welding method. By welding the metal material, the interface of the pipeline or equipment is fixed together to achieve the effect of plugging. This sealing method is suitable for pipelines or equipment with high pressure, high temperature and corrosive fluids.

4. Thread sealing:

Thread sealing is a method of sealing through a threaded connection. By tightening the threaded interface, the two components are fixed together to achieve the sealing effect. This sealing method is often used to connect pipes and valves and other equipment, and has the characteristics of simple and reliable.

5. Coating plugging:

Coating closure is a method of forming a sealing layer on the surface of a pipe or equipment by coating a material. The coating can be a coating, adhesive or silicone, etc., by forming a sealing layer on the surface of the pipe or equipment to achieve the effect of sealing. This sealing method is often used in the sealing of corrosion prevention, heat insulation and other aspects.

6. Reverse plugging:

Torsion plugging is a method of sealing by twisting the connector or bolt. By twisting the connector or bolt, the connection port of the pipeline or equipment is fixed together to achieve the effect of sealing. This plugging method is suitable for equipment that requires frequent disassembly and installation.

7. Compression plugging:

Compression plugging is a method of sealing by compressing material. Common compression plugging materials include asbestos, plastic, rubber, etc., by placing the material in the space of the pipe or equipment, and then pressing it with pressure to achieve the effect of sealing. This sealing method is often used to seal the interface of containers and pipelines.

In summary, pressure plugging is an important technique used to stop leaks, control fluid flow and maintain the proper operation of equipment. In different fields and industries, suitable plugging methods and technologies can be selected to meet specific needs. Different plugging methods have their own characteristics and scope of application, which need to be selected and used according to specific conditions in practical application.