Stopple plugging enables temporary isolation of pipeline sections without shutdown, allowing maintenance or modification activities to proceed safely.

1. System Installation

Initial setup includes:

• Installation of bypass split tees
• Installation of plugging tees
• Assembly of sandwich valves
• Installation of tapping machines for bypass connection

Hot tapping is performed on bypass lines to establish flow diversion.

2. Flow Diversion

• Bypass valves opened
• Pipeline content redirected through bypass system
• Main pipeline section safely isolated

This stage maintains uninterrupted operation of the system.

3. Plugging Operation

• Stopple cutter hot tapping performed
• Plugging machine installed on sandwich valve
• Plugging head inserted and sealing element engaged
• Pressure equalization completed
• Leak verification conducted prior to intervention work

The isolated section is now safe for repair, replacement, or modification.

4. Restoration Process

After work completion:

• Pipeline section refilled and pressure equalized
• Plugging head retracted
• Main line returned to active service
• Bypass system dismantled
• Blind flanges installed

Pipeline operation resumes under normal conditions without production shutdown.