Pressure plugging (also known as diffuser plugging) is a common construction method used to achieve temporary sealing and isolation during repair, overhaul, or replacement work in a pipe, container, or equipment. The following steps should be followed when performing a pressure plugging operation:

1. Preparation:

- Confirm the type, size and working conditions of pipes, containers or equipment in the construction area.

- Check the environment around the construction area to ensure stability and take necessary protective measures.

- Prepare the required tools, materials and equipment, such as sealers, writing tape, sealant, wrenches, etc.

2. Stabilization measures:

- Ensure that all relevant personnel are aware of the risks of construction operations and have the necessary stabilization training.

- Ensure that the construction site is well ventilated, and provide necessary protective equipment, such as safety hats, gloves, goggles, etc.

3. Pre-treatment:

- Clean and inspect the pipe or equipment to be blocked to ensure that the surface is free of dirt, corrosion or other undesirable conditions.

- Apply sealant around the sealing location as needed to ensure a good sealing effect.

4. Installation tape - Wrap the tape around the plug and adjust it according to the size and shape of the plug location.

- Insert the plug into the pipe or equipment and ensure that the tape is in close contact with the pipe or equipment.

Step 5 Apply pressure:

- According to construction requirements, use manual or automatic pressure devices to apply pressure to the plug, so that it is tightly connected to the pipe or equipment.

- Monitor whether the pressure is up to the required level and ensure the stability and tightness of the plug.

6. Complete plugging:

- After pressure plugging, close the pressure device and check the sealing effect of the plugging position.

- Perform the necessary testing or repair work as required to ensure the reliability of the plugging position.

7. Manage and recover:

- Clean up the construction site and ensure the environment around pipes and containers is clean and tidy.

- Restore the normal operation of the pipeline or equipment and carry out the necessary checks and tests to ensure that there are no problems affecting its normal operation.

Please note that pressure closure construction operations involve high pressure and specific working environments and must be performed by personnel with technical training and relevant skills. Before carrying out any construction operation, it is important to understand the relevant stability specifications in detail and follow the correct operating steps to ensure the stability and effectiveness of the construction.

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