DALROD UTILISES BRAWOLINER TO COMPLETE A CHALLENGING RENOVATION PROJECT NEAR ELY CATHEDRAL

The problem was that some 5 years ago pipeline survey works highlighted that ground movement has caused deterioration and cracking in sewers the vicinity of the cathedral, with the situation being carefully monitored by DALROD since. A more recent survey indicated that the sewers were now in need of relining, which is normally a straightforward procedure for the DALROD team. However, in this instance, one particular 225 mm (9 in) diameter sewer system, which was approximately 2.8 to 3.0 metres deep, had particularly difficult access problems. The access was tricky for various reasons including that the pipeline runs below a terrace of pre-war-built houses with no rodable access points from most of the lateral connections as well as poor access to most of the gardens of each individual property which made it difficult to reopen the lateral connections subsequent to the main line lining work. In addition to the access difficulties, most of the properties comprised 3-storey buildings that had live systems which could not be shut down adding to the general operational difficulties. All of this meant that Dal Rod had to reline the sewers whilst the system was live and over-pump where flows required it to make sure that no flooding occurred in the basements of any of the 3-storey buildings during the works. This was clearly a case for a trenchless lining or 'no-dig' solution. Having examined the options it was decided that Brawoliner was best suited to the work, a system which the DALROD team had previously utilised on similar jobs.

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BRAWOLINER® DN 50

The smallest BRAWOLINER® to date. For in-house rehabilitation In the past, defective flush-mounted small diameter pipes had to be repaired in open cut replacement. BRAWOLINER® is proud to announce a special liner for the rehabilitation of DN 50 sanitary pipes; for example from the shower to the wash basin, drain pipelines in the kitchen or industrial areas can now be rehabilitated easily with BRAWOLINER® DN 50. The seamless liner has the same product characteristics as the proven BRAWOLINER. It can be installed with a minimum pressure and up to 90 ° bends. As usual, the installation takes place with the inversion drum and an additional reduction nozzle.

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MULTI-DIAMETER AND EXTRA STRENGTH LINERS FOR THE UK RENOVATION MARKET

The rehabilitation of lateral connection pipes and service drains with in-built changes in diameter sometimes presents a major challenge for many existing rehabilitation technologies. Given the occurrence of such pipe structures, there has for some time been a need for a liner system that can accommodate such diameter fluctuations during the installation process without the need to excavate to access the diameter change location or design a liner with the diameter change in the ‘right position’ before installation. This is particularly the case where, in one single pipe length, large increases in diameter exist, for example from DN 100 to DN 150. The new BRAWOLINER® 3D liner system was developed especially

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