Key steps by steps
- Preparation:
- Conduct a thorough Job Safety Analysis (JSA) to identify and mitigate risks.
- Remove pressure from the pipeline and isolate the section where the valve needs replacement.
- Use tags on all isolation valves in the boundary to prevent accidental reopening.
- Perform nitrogen purging to ensure the system is inert, especially for gas lines.
- Isolation:
- Use the existing system isolation valves or a specialized isolation tool like the AOGV or a Tecno Plug to create a safe, verified, double block and bleed isolation.
- Test the isolation to ensure it is leak-tight before proceeding with valve removal.
- Valve removal:
- Safely remove the old valve, which may involve opening flanges and disconnecting the unit from the pipeline.
- Installation and testing:
- Install the new valve, ensuring it is correctly oriented and connected.
- Perform leak tests on the new valve and associated connections before returning the system to service.
- Follow all applicable safety and operational standards throughout the process.
You can watch this video to learn how offshore valve replacement is done:
