In Kunratice near Prague, we carried out a technically demanding intervention on a high-pressure gas pipeline, with the objective of modifying the pipeline without interrupting gas supply. The work was performed on a DN350 high-pressure pipeline operating at 24 bar.
The key requirement of the project was to maintain full operation of the system throughout the entire execution period, despite the need to intervene directly on the pipeline route.
Technical Solution and Scope of Work
The project included line stopping (pipeline isolation under pressure), a technology that enables the safe separation of a working section without shutting down the entire system.
To maintain continuous operation, a DN100 bypass in a 2× configuration had already been installed and commissioned at the construction site by the client before the start of our work.
The intervention included:
- creating a cut-out section in the pipeline,
- installation and welding of an end cap,
- construction of a new route shut-off valve,
- removal of the original non-compliant valve.
- This procedure enabled the safe replacement and modification of part of the pipeline route without interrupting operation of the gas transmission system.
Importance of No-Shutdown Technologies
Working on live pipelines is a key element of modern energy infrastructure management. By utilizing line stopping technology, it is possible to safely isolate a section of pipeline and perform necessary construction or technological work while maintaining uninterrupted system operation.
Conclusion
The project in Kunratice once again confirmed that a properly selected technological procedure enables safe and efficient modifications even on heavily loaded high-pressure gas pipelines.