CASE STUDIES
Fig 4: Connection of the liner with connector for crossing the lock
Fig 5: At this position, the liner is pressurised with water and lowered to the canal floor
These include significant advantages in terms of mobilisation and equipment requirements. The fabric-reinforced liner is transported on reels, saving space. Installation requires a mini-excavator or winch and simple hand tools. There is no need for machinery, manpower or time spent on complex welding to make the connection. Installation and dismantling times are correspondingly shorter. Primus Line normally take one or two days to lay six kilometres of their liner. Lengths of 1,000 metres and more in one section reduce the number of joints and weak points. The liner easily adapts to the unevenness of the surface. By comparison, installing the same length of HDPE pipe takes about 25 to 30 days, with increased additional labour costs. Dismantling the same length of pipe also takes only one to two days with Primus Line® Overland Piping, as the liner is simply rolled up, compared with seven to ten days for HDPE. The subsequent storage requirements for HDPE pipes are up to ten times greater than for liners on reels. In addition to storage and transport costs, operating costs are on average also lower due to minimal mobilisation and demobilisation costs and lower manpower requirements.
In addition to cost and efficiency, the low use of machinery also contributes to the environmental friendliness of the Overland Piping system. It can be installed in sensitive environments such as protected areas, nature parks or rivers without major environmental impact. This avoids emissions and reduces the carbon footprint.
The middle layer of the three-layered Primus Line® Overland Piping system ensures the safety of the flexible pipe: It is made of seamlessly woven Kevlar®. This synthetic fibre is up to ten times stronger than steel and twice as strong as glass fibre or nylon. The flexible pipe therefore has a very high factor of safety (FoS). The burst pressure is at least 2.5 times higher than the allowable operating pressure. The entire production process is closely monitored. Sensors and cameras continuously capture the process parameters and provide the basis for extensive wall thickness and consistency
28 | August 2024 |
www.draintraderltd.com
control mechanisms. In addition, every liner produced is subjected to an in-house pressure test before being delivered to the construction site.
Fast installation in emergency cases
Primus Line® Overland Piping also provides a solution in the event of catastrophes such as landslides, floods or forest fires that cause pipeline damage or failure. A single container can hold two to four kilometres of flexible pipe with the appropriate fittings. In case of an emergency, the flexible and spoolable Primus Line® above-ground pipe can be installed immediately and – depending on the environmental conditions – within a short period of time. In addition, the Primus Line® Overland Piping system has a very long service life – depending on the type of use and the conditions.
About Rädlinger primus line GmbH
The idea for an innovative product was born over 25 years ago. Today, Primus Line® is used worldwide as a safe, reliable and sustainable solution. It is used in the trenchless rehabilitation of pressurised pipelines (Primus Line® Rehab) and in the construction of freely layable pipelines (Primus Line® Overland Piping).
The core of the Primus Line® technology is a flexible pipe consisting of a fabric-reinforced liner and specially developed connectors. Suitable for the transport of water, oil and gas, it has the necessary approvals from many countries around the world and meets the highest standards for use in the drinking water sector.
Founded in 2001, Rädlinger primus line GmbH currently has around 100 employees at its headquarters and production site in Germany and branches in the USA, Canada, China and Australia, as well as a large, international and specially trained partner network.
primusline.com
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