Pressure plugging is a technique commonly used in pipelines, containers, or equipment to stop the leakage of liquids, gases, or other substances. It is a very important job, especially for equipment that needs to be repaired, overhauled or replaced. In this article, I will cover the classification of pressure plugs in detail.

Pressure plugging can be classified according to different application areas and the objectives to be achieved. Here are some common categories:

1. Classification of sealing materials with pressure:

Rubber sealing: Rubber sealing is a common sealing material, which has good pressure resistance and chemical corrosion resistance. Commonly used rubber materials are nitrile rubber, fluorine rubber and silicone rubber.

- Metal sealing: Metal sealing mainly uses metal gaskets or bolts to seal. Metal sealing has high temperature resistance and pressure resistance, and is suitable for high temperature and high pressure working environment.

Plastic sealing: Plastic sealing is a commonly used low-pressure sealing material, commonly used plastic materials are polyethylene, polypropylene and polyvinyl chloride.

2. Pressure sealing method classification:

- Tape sealing: Tape sealing is done by wrapping a special sealing tape around the pipe or equipment to form a sealing layer to prevent liquid or gas leakage. Wire and tape plugging is suitable for small diameter pipes and equipment.

- Glue sealing: Glue sealing is used to apply special sealing glue to the joints of pipes or devices to form a sealing layer and prevent leaks. Glue sealing is suitable for larger diameter pipes and equipment.

- Expansion plugging: Expansion plugging is a method of filling the internal cavity of the pipeline or equipment with expansion agent injected into the pipeline or equipment to make the plugging material expand and fill the pipeline or equipment. Expansion plug is suitable for large diameter and high pressure pipes and equipment.

3. Pressure sealing application field classification:

- Pipe plugging: Pipe plugging refers to the sealing of pipes to prevent liquid or gas leakage. Pipeline plugging is suitable for pipeline maintenance, overhaul and replacement in petroleum, chemical, water supply and other industries.

- Container plugging: Container plugging refers to the sealing of the container to prevent the leakage of liquid or gas in the container. Container plugging is suitable for the maintenance, overhaul and replacement of containers such as storage tanks and tank trucks.

- Device blocking: Devices are blocked to prevent liquid or gas leakage. Equipment plugging is suitable for the maintenance, overhaul and replacement of equipment such as pressure vessels and pumping stations.

As an important technical means, plugging with pressure is of great significance for equipment maintenance, stable operation and environmental protection. Understanding the different types of pressure sealing methods and materials helps to choose the appropriate sealing scheme, ensure the smooth progress of the work, and reduce unnecessary stability risks and losses.