Basic concept operation with pressure closure: In engineering construction and maintenance, pressure closure is an important technical operation to stop fluid or gas leaks in pipelines or containers and ensure the stability of the working environment. This technical operation involves a series of steps and tools that require experienced personnel to operate. This paper will introduce the basic concept and operation flow of pressure plugging in detail.

1. Basic concepts:

Sealing with pressure refers to the technical operation of applying a certain pressure inside the pipeline or container and using the sealing appliance to close the pipeline or container to prevent the leakage of fluid or gas. This operation is usually used in pipeline maintenance, modification or testing, which can effectively protect workers and prevent environmental pollution and equipment damage.

2. Operation process:

1) Preparation: Before the operation of sealing with pressure, it is necessary to conduct a safety check on the working area to ensure that there are no fire sources and flammable substances. At the same time, check the integrity and suitability of the plug device to confirm that it can withstand the required pressure.

(2) Install a plugging device: Insert the plugging device into the pipeline or container, and adjust its position and Angle as necessary to ensure that the channel of the pipeline or container can be completely closed. Tools are then used to hold the plug in place to prevent it from moving or falling off under pressure.

(3) Apply pressure: the pressure is transmitted to the inside of the pipeline or container through the pressure pump or air source, and the pressure is gradually increased until the design requirements are met. During the process of applying pressure, it is necessary to closely monitor the reading of the pressure gauge to ensure that it does not exceed the range of the plugging appliance.

(4) Testing the blocking effect: After reaching the design pressure, it is necessary to test the blocking effect. The sealing effect can be confirmed by observing the fluctuation of the pressure gauge and checking whether there is leakage around the sealing appliance. If there is an abnormal situation, it is necessary to stop the pressure in time and investigate the cause.

(5) Pressure relief: After confirming the good sealing effect, the pressure can be gradually reduced and eventually released. During the pressure release process, caution is required to prevent sudden pressure release from causing accidents.

(6) Cleaning work: After completing the sealing operation with pressure, it is necessary to remove the sealing appliance from the pipeline or container and clean the working area. At the same time, the plug equipment is inspected and maintained to ensure that it can be used again.

Plugging with pressure is a technically demanding operation that requires the operator to have a wealth of experience and skills. When operating, it should be carried out in strict accordance with the operation process to ensure the construction effect. At the same time, the plug equipment is regularly tested and maintained to ensure its performance and reliability. It is hoped that this paper can help readers better understand the basic concept and operation process of sealing with pressure, and provide reference for engineering construction and maintenance.