Interflow’s spiral wound lining for sustainable pipe maintenance
Aug 28, 2023
Spiral wound lining is a sustainable method of pipe maintenance, allowing water authorities and councils to renew their critical infrastructure. Interflow is an expert in this field and has been pioneering new techniques for decades.
With four decades of installation history, the spiral wound method has been used on millions of metres of pipe across the globe. Like CIPP or slip lining, spiral wound liners provide a structural lining solution for fully deteriorated pipelines with minimal site disruption. When it comes to Australia, spiral wound pipe technology is the most used product in the pipe renewal market.
It has been used in the majority of pipes lined across Australia. Interflow has become synonymous with the technology, having installed more than 95 per cent of all spiral wound liners across the country.
Expanda spiral wound liner
Expanda produces a PVC liner in intimate contact with the host pipe. It restores the structural integrity, reliability and flow efficiency of ageing sewer and gravity pipelines. Expanda can provide communities with an additional 50 years or more of life out of their pipelines. There is no need for heating or temporary softening of Expanda, which is installed with a mechanical process.
This approach increases the range of applications where structural sewer lining can be implemented. The PVC liner is rigid, providing a smooth circular bore to restore the hydraulic efficiency of the pipe. The material of the pipe does not restrict Expanda.
Rotaloc spiral wound technology
It can provide a structural liner for deteriorated pipelines. Rotaloc has been installed under difficult site conditions with minimal community disruption. It is designed to bring back larger diameter deteriorated pipes and culverts to full service. There is no need to rely on the strength of the host pipe.Rotaloc is installed by winding a continuous strip of interlocked PVC through the pipe using a custom winding machine.
The machine moves through the pipe between access chambers or culvert openings and can adjust the diameter of the liner as it moves along the pipeline. It ensures the liner sits tightly against the host pipe, even if the diameter changes along its length.
Once the liner is in place, the void between the liner and the host pipe can be filled with cementitious grout. This is typical in culvert applications to secure the liner in place.
Benefits of spiral wound lining
Some might question why have spiral wound pipes became so successful in this market. First, spiral wound lining is made from a ribbed structure, giving it a high strength-to-weight ratio. That means less material is needed, making it a more cost-effective and sustainable solution. Such strength saw the Victorian Department of Transport introduce steel reinforced Rotaloc for rehabilitating three road culverts under the Monash Freeway.
Rotaloc was strong enough to rehabilitate the three culverts without relying on the integrity of the host pipe. Spiral wound lining can be installed while liquids flow through pipes without bypassing the flow. It can be deployed in numerous situations without disrupting people’s lives. The installation of the Rotaloc lining meant that there were no road closures on one of the busiest roadways in Melbourne.
This saved time for the Department of Transport and headaches for tens of thousands of commuters daily. The other challenge of the Monash Freeway culvert example is that each had different diameters. The Rotaloc solution worked seamlessly. At its most fundamental, the technique remains the same, regardless of the diameter of the pipe. By locking strips of lining together, the installation process is entirely mechanical. There is no need for any curing or heating to prepare the lining for the pipe. Given the variable nature of pipelines, this is an enormous advantage.
This was a suitable solution in Paraburdoo in remote Western Australia, where Interflow installed more than two kilometres of sewers with Expanda spiral wound liners. When looking at any infrastructure project, a key component is managing the community impacted by the works. Spiral wound lining installations tend to have small site footprints and minimise disruptions to residents.
An example of this occurred as part of the Albert Street sewer relining, which was part of the Cross River Rail Project in Brisbane. Interflow utilised its Expanda product to reline trunk sewer mains while only operating during limited windows at night in the middle of the Brisbane CBD.
The evolution of spiral wound lining
It can be utilised in applications where rehabilitation by lining would otherwise have been impossible. Latest advances have seen many of the limitations of these liners overcome. It continues to extend the possibilities for structural rehabilitation of an ever-widening range of deteriorated conduit configurations under a broad range of conditions. Investment is being made in further research and development.
These results should see the possibilities extend further. As with past advances, development is taking place with the support of Australian and New Zealand water authorities. They have always encouraged such development. It represents a willingness to incorporate innovative solutions that can be seen to offer mutual benefits.
More News and Articles
Oct 02, 2023
A utility detection equipment specialist shares his expert tips on understanding electromagnetic field (EMF) locators, the importance of training, and how to work with manufacturers.
Sep 29, 2023
Researchers from the University of Illinois Chicago have proposed a “dual-pipeline” solution to address the region’s water supply issues. The system would feature one line supplying industrial sites with treated wastewater and another conveying drinking water to homes and other …
Sep 27, 2023
New e-learning module of the course BE-07 Investigation and Inspection of Sewers and Pipelines now available on UNITRACC!
Sep 27, 2023
Any water loss through leaking pipes is unacceptable in the eyes of the public, and on the launch of a deep-dive leakage report from Ovarro, technology leader for leakage solutions, Barbara Hathaway, explains how technologies continue to advance.
Sep 25, 2023
Pumping liquids may seem like a solved problem, but optimizing the process is still an area of active research. Any pumping application—from industrial scales to heating systems at home—would benefit from a reduction in energy demands. Researchers at the Institute …
Sep 22, 2023
PPXXI Conference and Exhibition welcomes McElroy Manufacturing, Inc. as the mobile app sponsor. Their sponsorship enhances networking opportunities for the delegates. Scheduled over September 25 -27, 2023, in Lake Buena Vista, Florida, PPXXI is the key technical and business event …
Sep 20, 2023
Aquatech is the leading water technology show in the world, with over 800 exhibitors and expecting over 22,000 visitors from over 140+ countries.
Sep 18, 2023
Designed to reduce pollution in Lake Erie by four billion gallons per year, Project Clean Lake is a 25-year plan being overseen by Cleveland's Northeast Ohio Regional Sewer District (NEORSD). When construction crews complete the $3 billion undertaking in 2036, …
Sep 13, 2023
Mullane once again proved why the company is an industry leader in pipeline solutions with a relining project on the mid north coast of New South Wales.
Sep 11, 2023
Pezzimenti Trenchless continues to showcase its position as a leading trenchless specialist by completing works on two Victorian projects.
Sep 08, 2023
Silvertown Tunnel under Thames - Newham to Greenwich near O2 Arena: See two massive boreholes in east London
The second of two boreholes beneath the Thames – which will together form London’s new Silvertown Tunnel – is now complete.
Sep 04, 2023
Report highlights American Water’s sustainable impact on communities across the U.S.