Pressure plugging is a technique commonly used in the construction process to plug the pressure in a pipe or equipment. By plugging, the flow of gas or liquid in pipelines or equipment can be effectively controlled for maintenance, overhaul or other necessary construction work. The following is a detailed construction scheme with expansion and pressure sealing to ensure the smooth progress of the construction process.

1. Preparation before construction

Adequate pre-construction preparations must be carried out before pressure plugging is carried out. First of all, the blocked pipeline or equipment should be fully inspected to ensure that it is intact. Secondly, it is necessary to understand the fluid pressure, temperature, flow and other relevant parameters in the pipeline or equipment in order to choose the appropriate sealing materials and methods. In addition, it is necessary to prepare the necessary plugging tools and equipment, such as plugging ball, plugging plate, plugging paste, etc.

2. Selection of sealing materials

According to the characteristics of the pipeline or equipment and construction requirements, choose the appropriate sealing material. Commonly used sealing materials are rubber sealing ball, sealing plate, sealing paste and so on. The rubber sealing ball is suitable for small diameter pipelines, the sealing plate is suitable for large diameter pipelines or equipment, and the sealing paste is suitable for irregular shapes or parts with holes.

3. Prepare plugging tools and devices

Prepare plugging tools and equipment as required. Plugging balls and plates are common plugging tools, which can be selected according to the diameter and shape of the pipe or equipment. In addition, it is necessary to prepare equipment such as air pumps, pressure gauges, and pressure relief valves for plugging operation and monitoring.

4. Perform the following steps to block the device

(1) Determine the plugging point: determine the location of the plugging according to the construction needs and the characteristics of the pipeline or equipment. Generally, the location with lower pressure is selected as the plugging point to reduce the difficulty and risk of plugging.

(2) Cleaning preparation: Before plugging, the pipeline or equipment near the plugging point should be cleaned to ensure that there is no debris and dirt.

(3) Installation of sealing material: according to the selected sealing material, the sealing ball, sealing plate or sealing paste is installed on the sealing point. Ensure that the sealing material is in close contact with the pipe or equipment and can effectively block the fluid.

(4) Plugging pressure test: After plugging, use pressure gauges and other equipment to monitor the pressure at the plugging point. Ensure that the plug point can withstand the pressure applied and that no air or liquid leakage occurs.

(5) Construction operation: After the completion of plugging, necessary construction operations, such as maintenance, replacement, overhaul, etc. Operate according to specific construction requirements to ensure construction quality.

5. Post-construction treatment

After the completion of the construction, the corresponding post-treatment work needs to be carried out. First of all, check whether the sealing point is firm and there is no leakage or leakage. Second, the plugging materials and equipment should be cleaned and stored for next use. Finally, it is necessary to record the relevant data and conditions in the construction process for reference and filing.

Through the above expansion, we introduce the construction scheme with pressure sealing in detail, from the pre-construction preparation to the selection of sealing materials, to the operation steps of sealing and post-construction treatment, to ensure the smooth progress of the construction process. In addition, the inspection and recording work in the construction is also emphasized for subsequent reference and filing. I hope the above content can meet your requirements.