Successful Completion of DN200 and DN300 Barrel Double-Seal Operations
2026-04-07
A significant milestone was reached today as the DN200 and DN300 barrel double-seal operations were successfully completed on the Nanchang natural gas pipeline. This achievement marks a critical step forward in the pipeline's maintenance and modification, ensuring the continued safe and efficient transport of natural gas.
The operation utilized advanced barrel double-seal technology, a sophisticated method for isolating sections of a live pipeline. The equipment, engineered for high-pressure environments, featured a design pressure of 1.6 MPa. The procedure was executed flawlessly with the pipeline's operating pressure at a steady 0.6 MPa, with natural gas as the medium.
Faced with the inherent risks and technical complexities of working on a live natural gas line, the project team undertook extensive preparation. A detailed operational plan was developed, and the sealing performance and pressure-bearing capabilities of the double-seal apparatus were rigorously tested to guarantee reliability under demanding conditions.
During the operation, technicians meticulously followed all safety protocols, precisely managing the installation, commissioning, and sealing process for both the DN200 and DN300 pipelines. The team's expertise was crucial in overcoming challenges related to sealing compatibility between the double-seal device and the pipeline interfaces. The successful outcome confirms the stable and effective sealing of the apparatus at the 0.6 MPa operating pressure, with all parameters meeting or exceeding design specifications.
The successful completion of this operation is a testament to the effectiveness of modern barrel double-seal technology for in-service pipeline maintenance. By avoiding a complete system shutdown, the project prevented significant economic losses and disruptions to the natural gas supply. Furthermore, the application of equipment with a 1.6 MPa design pressure in a live 0.6 MPa environment provides a valuable benchmark and accumulated expertise for future high-pressure pipeline projects within the industry.
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