Pressure plugging is a plugging technique used in common facilities to prevent fluid leakage or material leakage by applying pressure to compress the sealing material into the hole of a pipe or container. In many industrial fields, such as petrochemical, energy, water treatment, etc., pressure plugging is widely used in equipment maintenance, emergency repair and system transformation. In terms of quality assurance, sealing with pressure is a key link, the following will introduce the quality assurance with pressure sealing in detail.

First of all, quality assurance with pressure sealing requires a strict selection of sealing materials. Sealing materials usually use elastic materials, such as rubber, silicone, etc., these materials have good elasticity and corrosion resistance, and can maintain a stable sealing effect under high pressure. When selecting sealing materials, it is necessary to consider the temperature, pressure and nature of the medium of the working environment to ensure that the sealing material can meet the sealing requirements under working conditions.

Secondly, quality assurance requires strict control of the construction process with pressure sealing. Cleaning and inspection of equipment or pipes before construction to ensure that there is no debris, dirt or damaged areas. The installation of sealing materials should be carried out in accordance with the requirements of the manufacturer to ensure the correct selection and installation of sealing materials. In the process of sealing with pressure, it is necessary to control the applied pressure to avoid the impact of too much or too low pressure on the sealing effect. At the same time, the construction personnel need to accept technical training and technical guidance to ensure correct operation and take corresponding stability measures.

Third, quality assurance is tested and monitored. After sealing with pressure is completed, it is necessary to strictly ensure that the sealing effect meets the requirements. Commonly used testing methods include pressure testing, leakage testing and material quality inspection. The pressure test can judge the sealing effect by applying a certain pressure and observing whether the system leaks. The leak test can determine the sealing effect by detecting the leak point. Material quality inspection can test the physical and chemical properties of the sealing material to ensure that its quality meets the standard. During use, testing and maintenance are also required to discover and solve potential problems in time to ensure the long-term reliability of sealing with pressure.

Finally, quality assurance needs to establish a sound management system. For the sealing work with pressure, it is necessary to develop relevant working standards, operating procedures and management processes, clarify responsibilities and authority, and conduct training and assessment to ensure that workers have the necessary technical and management capabilities. At the same time, it is necessary to establish a sound record and file management system to record the construction process, test results and maintenance records with pressure sealing, so as to provide a basis for subsequent quality management.

In short, the quality assurance of sealing with pressure is a comprehensive work, which needs to be comprehensively considered and implemented from four aspects: material selection, construction control, testing and monitoring, and management system. Through strict quality assurance measures, the long-term reliability and stability of the sealing with pressure can be ensured to avoid accidents and losses.