{"id":6940,"date":"2023-08-24T11:13:44","date_gmt":"2023-08-24T01:13:44","guid":{"rendered":"https:\/\/nuflow.net\/?p=6940"},"modified":"2023-08-24T13:38:52","modified_gmt":"2023-08-24T03:38:52","slug":"from-cracked-to-intact-pipe-relining-prevents-drain-on-time-and-money","status":"publish","type":"post","link":"https:\/\/nuflow.net\/from-cracked-to-intact-pipe-relining-prevents-drain-on-time-and-money\/","title":{"rendered":"From cracked to intact: pipe relining prevents drain on time and money"},"content":{"rendered":"\n
It\u2019s important for a residential dwelling\u2019s pipe system to be both safe and durable, particularly when it comes to stormwater drains. These are designed to direct excess water away from a property and to help prevent flood damages, saving both residents and the local council from costly repairs and major. <\/p>\n\n\n\n
So, when a cracked stormwater system was discovered in a newly completed housing development in the North Harbour region, the managing construction company knew they needed to rectify the problem quickly. However, with the asset surrounded by newly built infrastructure for the development, they needed a solution that wouldn\u2019t demand its destruction. Fortunately, this is Nuflow\u2019s speciality. <\/p>\n\n\n\n
Piritahi is a construction company in Auckland that develops land and old subdivisions on behalf of government agency, K\u0101inga Ora, to provide rental housing for New Zealanders in need. <\/p>\n\n\n\n
Recently, Piritahi completed an infrastructure upgrade in the North Harbour region. Before they were able to open the new subdivision, they were required to confirm safety and building compliance for various assets across the project. This included conducting a CCTV inspection and flow report on the reinforced concrete stormwater system which had been installed as part of the upgrade. During the inspection, Piritahi uncovered a crack along a 5m section of the pipe that had occurred after its installation. <\/p>\n\n\n\n
The crack meant that the pipe was no longer structurally sound, and was at risk of collapsing if left unaddressed. It also meant that Piritahi couldn\u2019t transfer ownership of to the local water authority until it was fixed. This would prove difficult as the stormwater pipe was located beneath a brand new 12 inch thick concrete walkway with an attached culvert. A lot of work had gone into this walkway, and a replacement would mean destroying everything followed by extensive remedial work, essentially starting all over again. Plus, It was also next to a public access park that would inevitably be impacted by the excavation required to replace the pipe. <\/p>\n\n\n\n
Initial remediation plans involving the replacement were predicted to cost over $250,000 and set the project timeline back months. Piritahi wanted to avoid this at all costs, so they looked into possible reline solutions. Having worked with Nuflow North Harbour in the past, they realised they were the best option to reach out to. <\/p>\n\n\n\n
When head reliner at Nuflow North Harbour, David, got the request for a structural reline from Piritahi, he knew his team was up to the task. He started by organising a site visit where they inspected access points, reviewed site plans and determined the pipe specifications. <\/p>\n\n\n\n
Once he had all the information he needed, David reached out to Head Office and leveraged the expertise of Nuflow\u2019s engineers and technicians to find the best possible solution. They came back with the recommendation for a 20mm, fit-for-purpose Sumoline<\/a> liner. This is Nuflow\u2019s strongest CIPP relining system and has been specifically designed to structurally repair built infrastructure where load-bearing capacity is critical. They decided that they would reline the pipe in two sections to account for the large size. <\/p>\n\n\n\n As the largest pipe the Nuflow North Harbour team had dealt with, they realised they would need to custom make the liner in order to make it as effective as possible. Once they had confirmed the details, they submitted the price, plans and engineering specs for approval, and started preparing for the stormwater pipe repair. <\/p>\n\n\n\n Once the team got to the location, their first task was to establish the site. This meant determining public barriers and the area they needed for equipment and vehicles. They also needed to construct a shade tent to prep the materials so the resin wouldn\u2019t react to the sun and begin to harden before it was in place. Nuflow is committed to safety and quality, so doing this made sure that the job would be done correctly with as little risk as possible. <\/p>\n\n\n\n The first stage required wetting out the liner with the Sumoline resin. They then had to \u2018invert the plastic\u2019, which involves pushing a plastic skin of polypropylene the same size as the pipe into the liner to prevent the resin from sticking to the bladder as it inflates and cures. <\/p>\n\n\n\nUnprecedented pipe size calls for problem solving <\/h2>\n\n\n\n