Pressure Seal Plugging, Continuous Flow Pressure Seal Plugging involves sealing the original pipeline under pressure and using bypass lines to facilitate the installation and replacement of pipeline fittings without interrupting the flow. The process includes: welding four-way fittings at the locations requiring plugging, piercing the pipeline with a piercing machine, connecting sealers and other sealing devices to the pipeline and initiating the sealing operation, connecting the bypass pipeline to the original pipeline, unsealing the pipeline and backfilling pipe blocks after the connection is complete, applying anti-corrosion treatment to the four-way fittings, and using double seal plugging to reroute the operating medium temporarily through the bypass pipeline. After replacing the severely corroded original pipeline with a new anti-corrosion pipeline, the operating medium is rerouted back to the new pipeline. Continuous Flow Pressure Seal Plugging technology allows the entire construction process to be carried out under conditions where the pipeline flow is uninterrupted.

The non-stop pressure-sealing technology for pipeline disassembly, replacement, installation, and branch line addition can not only be performed under continuous medium transportation conditions but also enables safe and rapid repair in the event of pipeline leakage, ensuring timely restoration of normal pipeline operation. This technology features no temperature drop, no pressure drop, and no production halt, guaranteeing the normal operation of process industrial transportation, thus offering high overall benefits and practical value. While the construction technology of this non-stop pressure-sealing technology may be complex for longer pipelines, it can achieve the timeliness and cost-effectiveness requirements of pipeline modification safely and efficiently as long as the plans are reasonable, operations are conducted according to regulations, and strict control is maintained, while also significantly mitigating risks.