In the world of drainage and pipeline maintenance, localised patch repairs have emerged as an effective solution for isolated defects within longer pipe lengths. This innovative technique offers a cost-effective and efficient way to address specific areas of damage, ensuring the smooth operation of the entire system.
What are Localised Patch Repairs?
A localised patch repair involves the use of a short length liner to repair isolated defects within longer pipe lengths. This liner is attached to a packer and winched into place within the pipeline. The packer is then inflated to form a tight bond between the patch and the pipe wall where the localised damage is located. Once the patch has cured, the packer is deflated and withdrawn from the pipe, leaving the smooth, structural patch securely in place.
The process of localised patch repairs smooths over displaced joints, seals cracks and holes, reducing the resistance caused by such defects. The net effect of the patch is to increase the flow of solids and liquids, which in turn helps to prevent future blockages in a problem drain. Patch lengths usually range from 1000 mm to 1500 mm and are suitable for diameter ranges from 100 to 1200mm.
Traditional vs. UV Cured Patch Repairs
There are two primary methods for conducting localised patch repairs: the traditional ambient cured method and the faster UV cured method. The choice between these methods often depends on the scale of the project and the specific requirements of the job.
The traditional ambient cured method involves allowing the patch to cure naturally at ambient temperatures. This method is often used for smaller scale projects or when there is no urgent need for the pipeline to be operational immediately.
On the other hand, the UV cured method involves using ultraviolet light to cure the patch. This method is faster than the ambient cured method and is often used for larger scale projects or when the pipeline needs to be operational as soon as possible.
When to Use Localised Patch Repairs
If there are multiple defects in a pipe, a judgement needs to be made as to whether multiple patches or a full length liner is appropriate. The decision is normally made by balancing the relevant costs and the probability of further degradation of areas which would not be repaired by patching.
In conclusion, localised patch repairs offer a versatile and efficient solution for maintaining the integrity of drainage systems. By addressing isolated defects, this method ensures the smooth operation of the entire system, preventing future blockages and ensuring the longevity of the pipeline. As technology continues to evolve, we can expect to see even more advancements in this field, further enhancing the efficiency and effectiveness of localised patch repairs.
