What is the process of pressure-sealing?

Pressure-sealing is a method that involves increasing the pipe diameter over a certain length in the middle of a pipeline, and then installing isolation valves at both ends of that section to achieve pipeline sealing and maintenance operations. This method is mainly applicable to pipelines transporting suspended particles, liquids, or gases, etc. It has high sealing strength and stability, and can also eliminate the need for pipeline disassembly, installation, and lifting operations, forming a unique and irreplaceable pipeline treatment method in the market. I. Preparations before pressure sealing operation Understand the pipeline structure initially and formulate the construction plan. Before conducting pressure sealing, it is necessary to accurately understand the structure of the pipeline to be dealt with, including the size, material, length of the pipeline, the layout of pipeline equipment, and the medium being transported. Then, based on the actual engineering situation, a detailed construction plan should be formulated, including the work process, construction schedule, management plan, and personnel coordination. 2. Preparations before entering the site Before entering the site, a large amount of construction preparation work needs to be carried out, including allocating the necessary equipment, tools and materials for the construction, establishing a stable on-site management system, including the construction of various facilities such as dormitories, canteens, toilets, and bathrooms, and conducting inspections of the site. 3. Organize personnel The pressure sealing operation requires competent personnel for management and coordination. A specialized technical team should be organized to handle the specific operations, and some highly skilled, experienced and conscientious technical experts should be assigned to conduct the entire monitoring and management process. 64004acc32c94.jpgII. The specific process of pressure-sealing operation Select the widened sections and perform the data calculations. The selection of the widened section should be based on the actual situation and determine the pipe sections suitable for pressure sealing. Then, detailed calculations of pipeline data should be carried out, including length, pipe diameter, the specifications and quantity of sealing pipe fittings, the temperature and pressure of the sealing liquid, etc. 2. Opening and Flaring After determining the section, it is necessary to perform opening and flaring operations on this section to expand the pipe to the required size. This task may require the use of certain mechanical forces and it is necessary to take into account the strength and toughness of the pipe material to ensure the integrity of the pipe. 3. Assemble the sealing pipe fittings After the opening and expansion operations are completed, the assembly of the sealing pipe fittings needs to be carried out. These pipe fittings must have certain characteristics, such as high strength, strong pressure resistance, and good sealing performance, to be able to adapt to the special circumstances in the expanded section. 4. Filling of Sealed Liquids After the assembly work is completed, a certain amount of sealing liquid needs to be added and its inflow and outflow should be controlled through isolation valves. This liquid should be able to withstand high pressure and high temperature, and should have good properties such as anti-corrosion and anti-erosion. 5. Sealing and Stability Test After completing the above tasks, a sealing stability test needs to be conducted to ensure the stability, safety and reliability of the sealing. At the same time, cross-checking and eliminating various defects and risks are also required. 6. Inspection, acceptance and restoration of pipelines After the stable test of the sealing operation, a detailed inspection and acceptance of the pressurized-sealed pipeline are required, along with the restoration of the pipeline to its normal working condition. During this period, it is necessary to ensure the stability, orderliness and cleanliness of the site. III. Summary of Work after Pressure Sealing After completing all the work of pressure sealing and blocking, it is necessary to summarize and review the entire process of pipeline sealing and blocking. This summary and review mainly include the following aspects: project name, project type, size of pipeline components, construction time, construction progress, stable accidents, project quality, total expenditure, etc. Through this summary and review, problems can be promptly identified and improved in future work. Pressure sealing is a rather complex pipeline treatment method. Before implementing it, one must master the relevant skills and, based on the actual situation, carefully formulate the construction plan and adopt corresponding stable management strategies. All tasks should be carried out strictly in accordance with the standardized procedures to ensure that the entire project proceeds in an orderly and stable manner, thus guaranteeing the successful completion of the project.