Pressure plugging is a common engineering inspection method used to ensure the stability of pipeline systems during normal operation and maintenance. It is mainly done by applying internal or external pressure, and observing and recording the performance of the piping system. The following is a detailed inspection process with pressure closure, including preparation work, preparation of materials, execution steps and test results.

1. Preparation:

a. Determine the pipe system to be blocked, including the length of the pipe, the diameter of the pipe, and the required sealing position.

b. Analyze piping system design drawings and specifications to understand the characteristics and requirements of the system.

c. Contact relevant personnel, including engineers, technicians, and operators, to ensure they understand and participate in the closure process.

d. Check the tools and equipment required for plugging to ensure that they work properly.

2. Preparing materials a. Select appropriate sealing materials, such as rubber plugs, metal plugs, or expanders, based on the requirements of the pipeline system.

b. Ensure that the sealing material meets customer or industry standards and has adequate pressure resistance and sealing performance.

c. Check the size and shape of the sealing material to ensure that it can completely seal the piping system.

3. Perform the following steps:

a. Before plugging, ensure that the piping system has been cleaned and emptied as necessary to avoid contamination of the plugging material.

b. According to the design and specifications of the pipeline system, select an appropriate location for plugging and insert plugging materials into the pipeline.

c. Using common tools or equipment, expand or press the sealing material to ensure that it is tightly packed to the piping system.

d. Apply internal or external pressure to test the pressure resistance of the pipe. The pressure should be gradually increased and maintained within a certain time frame.

e. Observe and record the performance of the piping system, including leakage, deformation or stress concentration.

4. Record of test results:

a. Record the pressure applied during the plugging process and the duration.

b. Observe and record the performance of the piping system, including leakage, deformation or stress concentration.

c. If any problem or abnormal situation is found, take measures to repair it in time and record it.

d. After plugging is complete, release the pressure on the pipeline system and ensure that the plugging material is completely removed and removed.

e. Prepare a plugging inspection report, including a detailed description of the plugging process, test results and a record of any repair measures.

The above is an inspection process with pressure closure, covering the preparation, preparation of materials, execution of the procedure and the recording of test results to ensure the stability of the pipeline system, reduce the risk and accident. In actual operation, it should be adjusted and improved according to the specific pipeline system and requirements.