a trenchless pipeline rehabilitation

Spiral wound lining is a trenchless pipeline rehabilitation method that uses a continuous factory-manufactured PVC profile strip to create a new structural liner inside an existing pipeline. During installation, the PVC profile is mechanically wound and interlocked to form a continuous pipe within the host pipe.

This rehabilitation method requires minimal surface excavation and significantly reduces disruption to traffic, surrounding infrastructure, and nearby communities. In many gravity sewer applications, installation can be carried out while wastewater continues to flow through the pipeline, eliminating or greatly reducing the need for bypass pumping.

How Does Spiral Wound Lining Work?

Spiral wound lining uses a specialized winding machine to install a continuous PVC profile inside the existing pipeline.

The PVC profile is fed through existing access points and mechanically wound into the host pipe, where the profile edges interlock to form a new structural liner. Depending on the installation method, the liner is either expanded to fit tightly against the host pipe or stabilized by filling the annular space with structural grout.

This mechanical installation process minimizes excavation, shortens construction time, and reduces environmental impact while providing a durable structural rehabilitation solution.

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