Advanced Spiral Wound Lining Technology

This flexibility makes spiral wound lining suitable for a wide range of sewer, stormwater, drainage, and culvert rehabilitation projects.

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# Key Benefits

## Fully Structural Rehabilitation

* Provides a fully structural pipeline rehabilitation solution.

* Restores structural capacity without relying on the integrity of the existing host pipe.

* Suitable for partially or fully deteriorated pipelines.

* Extends pipeline service life by **50 years or more**.

## High Strength with Lightweight Construction

The ribbed PVC profile provides an excellent strength-to-weight ratio, reducing material usage while maintaining high structural performance. Steel-reinforced PVC profiles are also available for applications requiring higher load-bearing capacity.

## Mechanical Installation

Spiral wound lining is installed using a completely mechanical process.

The installation does not require:

* Chemical curing

* UV curing

* Steam curing

* Hot water curing

* Heat softening

This simplifies construction and improves installation reliability.

## Installation Under Live Flow

In many gravity sewer applications, spiral wound lining can be installed while wastewater continues to flow through the pipeline, eliminating or significantly reducing bypass pumping requirements.

## Minimal Surface Disruption

Installation is completed through existing manholes or access chambers without extensive excavation, resulting in:

* Reduced traffic disruption

* Shorter construction time

* Lower environmental impact

* Reduced noise

* Minimal disturbance to surrounding communities

 Improved Hydraulic Performance

The new PVC liner forms a smooth circular internal surface that improves hydraulic efficiency and reduces friction losses.

## Wide Range of Applications

Suitable for rehabilitating:

* Sewer pipelines

* Stormwater pipelines

* Drainage pipelines

* Culverts

* Circular pipelines

* Non-circular pipelines

* Pipelines with varying diameters

* Large-diameter pipelines

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# Industry Standards

Mechanical Spiral Wound Lining complies with the material and installation requirements specified in **ASTM F1697** and **ASTM F1741**.

According to these standards, spiral wound lining can be designed for both:

* **Partially deteriorated pipelines**, where the existing pipe continues to share structural loads.

* **Fully deteriorated pipelines**, where the new PVC liner is engineered to withstand all design loads independently of the host pipe.

Because the installation process is entirely mechanical, no chemical curing agents are required to form the new pipeline.

 Spiral Wound Lining Process

A continuous PVC profile strip is supplied from a reel positioned above ground and fed into the existing pipeline through manholes or other access points. No additional excavation is normally required.

A specialized winding machine constructs the liner directly inside the existing sewer, stormwater pipeline, or culvert by continuously winding and mechanically interlocking the PVC profile.

Depending on the pipeline diameter, the winding machine either pushes the liner forward or travels through the pipeline while continuously forming the new pipe.

During installation, the profile edges are mechanically locked together to create a continuous watertight liner.

Depending on project requirements, the liner may be installed as:

* A tight-fit liner requiring no grouting.

* A structural liner with the annular space filled using cementitious or structural grout.

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# Spiral Wound Installation Methods

Different installation methods are available to accommodate various pipeline diameters and project requirements.

## Small-Diameter Tight-Fit Lining

Suitable for small sewer, stormwater, and drainage pipelines.

A stationary hydraulic winding machine installs a tight-fitting structural liner directly inside the host pipe through existing access chambers.

**Features**

* Fully structural liner

* No annular space grouting required

* Minimal excavation

* Rapid installation

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## Medium-Diameter Tight-Fit Lining

Designed for medium-sized pipelines where a fully structural tight-fit liner can be installed without annular grouting.

A traveling winding machine moves through the pipeline while continuously constructing the liner.

**Features**

* Tight-fit installation

* Fully structural solution

* No grouting required

* Suitable for long pipeline sections

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## Large-Diameter Structural Lining

Designed for large-diameter circular and non-circular pipelines, stormwater systems, and culverts.

A traveling winding machine forms the PVC liner inside the existing pipeline. After installation,