TPi September 2013

products & developments Trenchless pipe rehabilitation with flexible high pressure pipelines

savings can be achieved. Pipelines that run in difficult to access areas with long insertion lengths (such as siphon pipelines) can be rehabilitated with this trenchless relining method. Since the hose is self-supporting and is not glued to the existing pipe, only a rough cleaning of the host pipe is required. This results in a saving of time and energy for the activation of adhesives. The hose is delivered on a drum that can hold up to 4,500m (14,500ft). Mobility costs can be reduced, and the small footprint makes Raedlinger Primus Line suitable for high traffic areas. The connectors, specifically designed for the Primus Line hose, can be installed within a short time period. Raedlinger Primus Line GmbH – Germany primusline@raedlinger.com www.primusline.com

for the specific fluid to be transported; the middle layer consists of a seamless aramid fabric that functions as a static load-bearing layer; and the outer layer is made of wear-resistant polyethylene, regardless of the transported fluid, and protects the middle layer during the installation process. The Raedlinger Primus Line hose is inserted into the host pipe from small construction pits and is self-supporting. The hose is not attached to the host pipe and an annular space remains between Raedlinger Primus Line and the host pipe. Specially developed connectors on each end connect the hose to the host pipe with flanges or welded ends. Due to the hose’s flexibility, bends of up to 45° can be negotiated, and installation lengths of up to 2,000m (6,500ft) in one single step can be realised. This means that fewer construction pits are needed, and additional cost and time

Utility providers all over the world are confronted with deteriorating drinking water infrastructure. The American Water Works Association estimates that investments of more than $500bn are required just in the USA in the next 20 years to maintain current quality standards and availability of drinking water. Raedlinger Primus Line is addressing this issue by providing a trenchless relining technology that can transport different fluids such as drinking water, natural gas, crude oil, salt water, kerosene and even some fluids containing abrasive components. The relining hose is produced in nominal diameters from 150 to 500mm (6" to 20") and can withstand pressures of up to 62 bar (899 psi).

The hose consists of three different layers: the inner layer can be selected

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September 2013 Tube Products International