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1.3 Non-invasive Renovation Of Pipes

Technical Description

This technology, a companion technique to the trenchless technology described above, is also known as lining. Short segments of piping are inserted into an existing pipeline and moved along in the direction of flow using hydraulic or mechanical means. The mechanical variation uses chains to move the liner along inside the old pipe, while the hydraulic option uses hydraulic rams to push the liner into place. If there is sufficient space between the liner and host pipe, the space may be filled with aggregate.

Extent of Use

This technology is being used in Poland by private contracting firms.

Level of Involvement

This technology may be implemented by private companies, service or utility firms, and local governmental administrations.

Operation and Maintenance

This is a non-invasive method and requires no excavation prior to the placement of pipe. Liners may be inserted into existing pipelines through manholes or other surface entry points. The technology requires specialist operation and specialised equipment.

Costs

Relatively to the diameter of pipe being repaired, costs range from $100 to $200/m, which is competitive with excavation work.

Effectiveness of the Technology

High effectiveness in the case of corroded and leaky pipes.

Suitability

The technology is suitable for use in all countries within the region.

Advantages

Lining provides greater integrity within the pipe network and may increase the durability and resistance of the pipeline against corrosion. This technology takes advantage of existing pipelines and does not result in disruption of roadways or land surface activities.

Disadvantages

This technology has no identified disadvantages, although lining may reduce the capacity of the lined pipe by the thickness of the liner. Hence, lining may not be suitable for use in pipe networks operating at or near capacity.

Cultural Acceptability

This method is accepted by civil engineering societies. The limited surface excavation also typically means that this technology is well accepted by the general public, who are less inconvenienced by this technique.

Further Development of the Technology

There is a need for the benefits of using this technology to be made more visible to contractors and consumers.

Information Sources

Reno Rur Centrum Sp. z o.o., Kielce, ul. Warszawska 34, skr. poczt. nr 624, Poland, Tel. (048-41) 411-41 w. 286, Tel./fax: (0-48 - 41) 44-330.

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