Technology

THE MEANING OF TRENCHLESS SEWER REHABILITATION NOWADAYS

As part of the global growth, with the increase in traffic and an increasing percentage of urbanisation, grid operators around the world are facing a mammoth task. In addition to the new construction of supply and sewer pipes, the maintenance and upkeep of existing pipe networks is very significant. Ultimately it is precisely the core areas that suffer under the massive effects of growth.

Trenchless pipe rehabilitation is more significant than ever for the maintenance and upkeep of supply and sewer pipes. Low disruption when operating the pipe networks and in the area around them make trenchless pipe rehabilitation a prime example of future technology. As one of the key technologies of trenchless pipe rehabilitation, the pipe lining process has been developed over the years. When rehabilitation process in particular is used, all the benefits of trenchless rehabilitation in comparison to conventional methods are easily seen.

The standard rehabilitation system that has now been established as the standard is well-developed and is used as the first choice in feasibility studies. Current investments in the overall network, which encompasses more than 500,000 km, do not lead to an improvement but at best the retention of the current status of the network. The DWA (Deutsche Gesellschaft für Wasser und Abwasser – German Society for Water and Sewage) also demands: “An enlargement of the annual sanitation capacity is absolutely necessary”. Tests carried out by DWA indicated that the cost effectiveness was not sufficiently considered by the grid operators. This problem increases many times abroad, both in Europe and further afield.

Trenchless pipe rehabilitation already has a history that spans over 40 years. After very simple methods were used, which were only able to achieve satisfactory results, this method has been repeatedly refined over the decades. Nowadays the majority of the rehabilitation products are manufactured industrially, need corresponding approval and are checked by modern testing laboratories. Ecological aspects are also increasing in significance.

When considering the pipe lining process, the process that has emerged as the top technology and preferred choice is the use of light-curing resins in combination with a glass-fibre reinforcement. Statistically highly effective due to the use of the most up-to-date corrosion-limited glass-fibre, cured in an environmentally-friendly manner by means of UV-initiated resin without waste process water, this technology is the technology of the future on the market. With increasing annual growth, the use of glass-fibre reinforced plastics is overtaking conventional methods.

iMPREG is one of the leading manufacturers of light-curing pipe liners. We have been successfully supplying efficient rehabilitation products to the whole world for over ten years. Our aim is to promote the use of trenchless pipe rehabilitation everywhere, together with the companies that we cooperate with.