1 February 2023

Understanding the Pipe Relining Process: Step-by-Step Guide

If you're dealing with damaged pipes, you know how frustrating and costly it can be to repair them. But did you know that there is a way to restore your pipes without excavation?

It's called pipe relining, and it's a popular method for repairing damaged pipes without disrupting your property. This article will provide a step-by-step guide to help you understand the pipe relining process.

Relining Of Pipe

Relining of pipe is a popular method used to repair and rehabilitate damaged pipelines. The process involves inserting a new liner into the existing pipe, which creates a new, seamless pipe within the old one. This technique is used to restore the pipe's structural integrity without the need for excavation, making it a cost-effective and efficient solution for repairing pipes.

One of the main advantages of the relining process is that it can be used to repair pipes of various sizes and materials, including PVC, cast iron, clay, and concrete. It is also a more environmentally friendly option since it reduces the need for excavation, which can cause disruption to the surrounding environment.

Relining of pipes is commonly used in various industries, including plumbing, construction, and infrastructure. This process is an excellent option for those looking to rehabilitate their pipelines without excavation.

Step-by-Step Guide to Pipe Relining

Step 1: Inspection

The first step in the pipe relining process is to conduct a site inspection. A CCTV drain camera is used to examine the interior of the pipes and identify any issues, such as blockages, damage, or intrusions, that may need to be addressed. This information is then used to determine the best course of action for preparing the pipe for relining.

Step 2: Clearing of the Pipe

If any blockages are found during the inspection, a hydro jetter is used to remove debris and clean the pipe walls. This is important to ensure a good bond between the new lining and the old pipe. Failure to do so could result in uneven linings and a compromised pipe.

Step 3: Check Pipe Is Ready for Relining

After clearing the pipes, the pipe is inspected again with the CCTV drain camera to confirm that all intrusions have been removed and the pipe is clean and ready for relining. If the pipe is clear and any damage is located, the next step is the relining of the pipe. The exact method and quantity of lining needed are determined at this point.

Step 4: Relining of the Pipe

The relining installation process begins by mixing epoxy resin with a hardening agent. The resin is then poured into the liner and repeatedly rolled to ensure even distribution and impregnation into the material. The liner is then blown into the pipe with a special inversion drum that inverts it inside out, ensuring that the resin-impregnated side is pressed against the old pipe.

Step 5: Curing

Once the liner is in place, it is cured using hot air or UV light to harden the material and create a new, seamless pipe within the existing one. This curing process can be sped up by using hot water.

Step 6: Final Quality Check

Once the damaged pipe has been completely lined and cured, any junctions or inspection pits need to be cut out. Inspection pits can typically be completed from the surface with a grinder, while a robotic cutter is needed for junctions. Finally, the pipe is checked to ensure the work was done properly, without wrinkling or open spaces in the resin.

The Latest Pipe Relining Techniques

In recent years, the pipe relining industry has seen significant advancements in technology and techniques, which have improved the efficiency and effectiveness of the relining process. Here are some of the latest pipe relining techniques:

Cured-in-place pipe (CIPP) lining: CIPP lining is a popular technique used for rehabilitating pipes. This method involves inserting a liner that is saturated with resin into the damaged pipe, which is then cured using hot water or steam to create a new, seamless pipe within the old one. This technique is faster and more cost effective than traditional excavation methods, and it can be used to repair pipes of various sizes and materials.
Inversion pipe lining: Inversion pipe lining is another popular technique used for relining pipes. This method involves inserting a liner into the pipe using an inversion drum or bladder, which is then inflated to create a new, seamless pipe within the old one. This technique is particularly useful for repairing pipes that have bends or curves, and it can be used for a wide range of pipe sizes.
Spray lining: Spray lining is a newer technique that involves spraying a liquid polymer into the damaged pipe to create a new, seamless lining. This method is particularly useful for repairing small-diameter pipes and pipes with complex geometries. Spray lining is a quick and cost-effective solution, and it can be used for pipes made of various materials, including PVC, cast iron, and concrete.
Ultraviolet (UV) curing: UV curing is a technique that involves using UV light to cure the resin used in the relining process. This technique is faster and more energy-efficient than traditional curing methods, and it can be used for a wide range of pipe sizes and materials.
Robot-assisted lining: Robot-assisted lining is a technique that involves using a robotic system to insert the liner into the pipe. This method is particularly useful for repairing pipes that are located in hard-to-reach areas, such as under streets or buildings. The robotic system is controlled remotely, which minimizes the need for human intervention and reduces the risk of human error.

These advancements have improved the efficiency and effectiveness of the relining process and made it possible to repair pipes of various sizes and materials. By staying up-to-date with the latest techniques, pipe relining companies can provide faster, more cost-effective solutions to their clients.

FAQs

How long does the relining process take?

The length of time required for the relining process can vary depending on factors such as the pipe's size, the damage's extent, and the type of liner being used. However, the process can be completed in most cases within a day or two.

What types of damage can be repaired with pipe relining?

Pipe relining can repair a wide range of damage, including cracks, leaks, corrosion, and root intrusions.

Will pipe relining fix a collapsed pipe?

No, if a pipe has collapsed, it cannot be relined. In this case, traditional pipe replacement methods will be required.

Is pipe relining a DIY project?

No, pipe relining should only be performed by a licensed and experienced pipe relining specialist with the proper equipment and training to complete the process correctly.

How does pipe relining compare to traditional pipe replacement?

Pipe relining is generally faster and less disruptive than traditional pipe replacement. It can also be more cost-effective, as it doesn't require extensive digging and excavation.

Can pipe relining be used for pipes with bends or angles?

Yes, pipe relining can be used for pipes with bends and angles. The flexibility of the liner material allows it to conform to the shape of the existing pipe.

In conclusion, understanding the pipe relining process is essential if dealing with damaged pipes. Pipe relining is a non-invasive, cost-effective, and efficient method for repairing damaged pipes without excavation. By following this step-by-step guide, you can better understand the process and make an informed decision about whether pipe relining is right for you.

Don't hesitate to contact our trusted pipe relining specialists to learn more about pipe relining and how it can benefit your plumbing system. At P24 Pipe Relining Sydney, our experienced pipe relining specialists use the latest technology and techniques to provide efficient and effective solutions for our clients.

Khoder Dandan -
P24 Operations Director

We are the experts in blocked drains and pipe relining solutions throughout Sydney.