Sewer rehabilitation using epoxy resin injection
Nov 17, 2010
The evolution in the repair of underground infrastructure such as water and wastewater pipes has resulted in the development of a highly competitive market in relining options. Here Paul Heenan from KA-TE PMO AG reflects on the importance of independent testing in the development and use of new products.
In June 2004, IKT conducted testing of 13 methods of repairs for lateral connections ranging from inliner, top hats and robotic methods. Only one manufacturer was awarded the rating of good from all those who participated. That company was KA-TE System AG, now KA-TE PMO AG, utilising its worldwide patented – Shield Repair System – which injects epoxy resin through small openings behind the shield.
Using a balloon inflated by the robot into the lateral means that it follows the natural angle of entry from the lateral into the main sewer, whatever the angle. This method allows more than one repair to be carried out in the same pipe length during a single travel. The shield has a minimal effect on the flow of the sewer and can be removed and re-used after the resin has cured.
The repaired area is precise and exact, making it cost effective and efficient, according to the company. The results from the test can be downloaded free from the website (www. ikt.de).
In July 2009, IKT followed up on the previous tests with Repair Methods in Main Sewers and once again KA-TE PMO AG achieved the best test results from the 14 systems tested. The repair this time was made not by the Shield Repair System, although this could have been used, but by manual filling.
The use of epoxy resin injection as a form of sewer repair is nothing new. There are more than 170 KA-TE PMO systems in operation worldwide; it has proven over the last 20 years to give the city and water engineers peace of mind when choosing this over other systems said the company. The likes of epoxy resin from Epoxonic and Congresive have been tested and shown to have no effect, even on drinking water. Repairs using epoxy resin are durable and robust, extending the life of the sewer infrastructure without any contamination.
>> This article is presented with permission of Trenchless International magazine <<
(www.trenchlessinternational.com)
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