42 | Hadlee & Brunton Drainage Ltd: Timaru Council - Pareora Pipeline REGIONAL DEVELOPMENT New range offers huge savings Hadlee & Brunton is currently using Amex pressure liner on stage two of the Pareora pipeline project for Timaru District Council. Karen Phelps Hadlee & Brunton has the exclusive New Zealand rights to supply, distribute and install the full range of revolutionary German pipe rehabilitation products manufactured by Amex Sanivar. In particular it is the range of Amex pressure liners, capable of operating pressures exceeding 50 bar that has Hadlee & Brunton director David Brunton excited. He says the product will revolutionise the New Zealand construction industry with major cost and timesaving, giving aging infrastructure a further 50 to 100 years lifespan. “The 3.5mm thick liners can line any type of pipe from 100 year old steel through to asbestos in lengths of up to 2km. Most importantly there is no resin, curing or grouting involved, just a flanged coupler at each end and inflate to one bar pressure to install. These liners can be used for potable water (AS/NZS approved), sewer, industrial waste water along with oil and gas,” he explains. Hadlee & Brunton is currently using Amex pressure liner on stage two of the Pareora pipeline project for Timaru District Council. David says that the final piece of the project is the technically complex section through the Pareora Gorge. This is where the innovative Amex pressure pipe lining technology will be used rather than replacing the existing pipe. David says that the Amex SaniTube liner consists of special woven textile, which is extruded into a PE or PU coating. This creates an incredibly strong homogeneous product, which can triple the capable pressure rating of any pipeline in almost any condition. It also improves the flow characteristics to the same as a new PE pipe. This 5km part of the project will be split into small sections, bypassing the existing main with an overland Amex pipe to isolate the section of main, which is being lined. Hadlee & Brunton will then camera and scan the main with their long-distance fibre optic camera equipment, clean it, line it with the liner, then hook it up and move to the next piece of the pipe. This methodology will reduce the need for significant groundworks along the gorge. “It’s also quicker to install, more flexible and will also help reduce the carbon footprint of the project as no open cutting or trenching will be required and existing pipe will be reused,” explains David. The pressure liners have also been put to good use on several other recent projects throughout NZ, demonstrating their clear advantages including the Te Ana Wai main potable trunk upgrade for Timaru District Council, which upgraded a bitumen lined steel pipeline operating at PN35. It was also used on the very high profile failed twin 180mm sludge lines in Wellington, which were both 1.8km long and cast into the concrete floor of the Wellington sewer interceptor tunnel between Island Bay and Kilbirnie and a project for Queenstown Lakes District Council to increase the pressure rating of an existing 400mm PN6 PE pumped sewer pipe to PN16, which serviced Kelvin Heights. David says these tricky projects that nobody else could attempt were successfully completed with Amex pressure liner.
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