Pressure plugging is a common engineering technique used to ensure the stable operation of pipeline systems. Its main purpose is to prevent fluid leakage or other undesirable substances from entering the piping system. In order to ensure the quality of sealing with pressure, a series of interpretations and evaluations are required. In this article, I will explain in detail how to interpret the quality of a pressure plug and provide some practical advice.

First of all, the quality interpretation of sealing with pressure includes the following aspects:

1. Plugging pressure test: After plugging with pressure, it is necessary to perform pressure test on the pipeline system. The test needs to maintain a certain pressure, usually 1.5 times the design working pressure, for a period of time, to observe whether the pressure is significantly reduced. If the pressure drops slowly or remains stable, it indicates that the plugging quality is good. If the pressure drops rapidly or does not remain stable, there may be a leak problem.

2. Leakage point detection: Leakage point refers to the possible leakage point in the pipeline system. After the pressure plug is performed, a variety of methods can be used for leak detection, such as pressure detection, ultrasonic detection, etc. These detection methods can help identify the specific location of the leak, and further repair or remedial measures.

3. Evaluation of sealing materials: the quality of sealing materials directly affects the effect of sealing with pressure. Therefore, the plugging material needs to be evaluated before a pressure plug is performed. For example, the strength, temperature resistance, chemical resistance of the sealing material is tested to ensure that it meets the design requirements.

4. Sealing process evaluation: the rationality of sealing process is also one of the important indicators to interpret the sealing quality with pressure. The plugging process needs to consider the characteristics and actual conditions of the pipeline system, and adopt appropriate plugging methods and equipment. For example, for large diameter pipes, special processes such as a stopper or an inflatable plug may be required.

In addition to the above aspects, the quality of sealing with pressure can also be improved by the following methods:

1. Select the appropriate sealing material: Select the appropriate sealing material according to the characteristics and requirements of the pipeline system. For example, for high-pressure pipes, high-strength sealing materials can be selected; For pipelines with high corrosion resistance requirements, materials with good corrosion resistance can be selected.

2. Strictly implement the plugging process: During the execution of the plugging process, it is necessary to operate in accordance with norms and standards to ensure that each link meets the requirements. For example, for the stirring, injection, compaction and other operations of the sealing material, it is necessary to control the parameters such as time, temperature, and pressure.

3. Proper pre-treatment: Proper pre-treatment of the piping system is required before plugging with pressure. For example, cleaning pipes to remove impurities and sediment; Repair existing leaks or damage; Make sure the pipe surface is clean, smooth, etc.

4. Regular testing and maintenance: After plugging with pressure, it is necessary to carry out regular testing and maintenance to ensure lasting and stable plugging effect. For example, regularly check the pressure, temperature and other parameters, find problems in time to repair; Check the aging of sealing materials regularly and replace them in time.

To sum up, it is necessary to comprehensively consider the sealing pressure test, leak point detection, sealing material evaluation and sealing process evaluation to determine the quality of sealing with pressure. At the same time, the quality of sealing with pressure can be improved by selecting appropriate sealing materials, strictly implementing the sealing process, proper pretreatment and regular inspection and maintenance. This can ensure the stable operation of the pipeline system and reduce the occurrence of leaks and other problems.

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