Guide to Getting Started with Pipeline Lining for Professionals

The field of wastewater network rehabilitation has been revolutionized by pipeline lining. This technique, both economical and durable, avoids the need for major and costly works. For professionals, mastering lining and its steps proves crucial to ensure the longevity of installations.

In the face of constant advances in techniques and materials, lining emerges as the preferred solution for pipeline repair. Thanks to the use of epoxy resins or reinforced fiberglass liners, this method guarantees optimal strength and waterproofing. Moreover, lining is a less invasive alternative to complete pipe replacement.

Understanding pipeline lining

What is pipeline lining?

Pipeline lining is a modern technique designed for the rehabilitation of wastewater networks without requiring excavation. It involves the use of a liner - usually made of fiberglass or felt - impregnated with a resin, such as epoxy or polyester. This liner is inserted into the existing pipeline. Following this, the resin hardens, creating a new robust and waterproof internal wall. This process helps extend the life of the pipeline by avoiding the drawbacks associated with traditional repairs.

Particularly suited for hard-to-access pipelines, lining can be applied to pipes of various sizes, ranging from 15 to 125 cm in diameter. It proves effective for repairing cracks, holes, and defective joints. Additionally, it strengthens pipelines eroded by corrosion or wear.

The procedure begins with a precise assessment of the conduit using an endoscopic camera. This diagnosis is followed by intensive high-pressure cleaning, preparing the surface for the insertion of the resin liner. The liner is positioned either by pulling or inversion before being cured to form the new internal wall.

Advantages of the lining method

Pipeline lining offers several notable advantages over traditional methods. First, it is more economical, avoiding the costs and disruptions related to excavation and pipeline replacement. This method also stands out for its speed of execution and low disturbance to residents.

In the long term, a sanitation network restored by lining can achieve a lifespan of 50 years, thus offering a durable solution. Its low environmental impact, due to the absence of waste generated by excavation operations, is another positive aspect.

Furthermore, lining helps improve water quality. It prevents contamination through infiltration and limits the formation of scale and other blockages, optimizing the overall performance of the sanitation network.

Different techniques and materials used

The field of pipeline lining uses a variety of techniques and materials, each suited to specific contexts. Epoxy, polyester, and vinylester resins are favored for their optimal adhesion and resistance once cured.

Depending on the type of pipeline and the nature of the problem, lining methods differ. Continuous fiberglass lining with polyester resin stands out for its ability to form a resistant, wrinkle-free coating. Meanwhile, felt impregnated with epoxy resin remains ideal for more complex configurations.

Polymerization, essential for resin solidification, varies depending on the material: this process can be done dry, or with the addition of steam, hot water, or UV rays. This step is critical to ensure the strength and waterproofing of the new internal structure.

Equipment needed for pipeline lining

Main tools and machines

Pipeline lining is a procedure requiring a range of specialized equipment. Milling robots are essential to remove obstructions and smooth internal surfaces. Inspection cameras are equally crucial, providing a precise view of the pipeline condition to accurately guide the lining.

Resin projection devices, such as the CuraFlow® system, guarantee a homogeneous application of the resin. In the context of lining by sleeving, the use of polyester or fiberglass sleeves, impregnated with resin on site, is a common practice.

Regarding polymerization, a crucial stage that ensures the hardening of the resin, various equipment is used. These vary according to the technique employed: heating systems, use of steam, hot water, or UV lamps are all solutions to activate and harden the resin.

Choosing the right equipment for different types of pipes

The choice of materials for lining varies depending on the type of pipe and its condition. PVC pipes benefit from resins specially designed for optimal adhesion. As for metal pipes, they often require epoxy resins, known for their corrosion resistance.

The diameter and configuration of the pipes also influence the selection of materials. Flexible fiberglass liners are perfectly suited for winding routes, while stiffer versions are adapted to straight sections.

Calling on specialists is crucial for an informed choice of equipment. They provide personalized recommendations based on the site's specifics and the characteristics of the pipes.

Initial investments and maintenance management

Although the initial acquisition of lining equipment represents a significant investment, it proves cost-effective in the long term by preventing expensive pipe replacements. The main investments concern milling robots, resin projection systems, and polymerization equipment.

Methodical maintenance is essential to extend durability and guarantee equipment efficiency. Regular checks as well as technological updates are indispensable to keep equipment operational.

Investment in staff training is also a priority. It is essential that operators are skilled in modern lining techniques and the proper use of equipment, thereby ensuring excellence and safety during interventions.

Setting up a lining operation

Preparatory steps: Inspection and cleaning

To ensure the success of any lining operation, a thorough inspection of the pipes is essential. Using a dedicated camera, this initial analysis allows for the detection of cracks, blockages, and various damages. Thus, the condition of the pipelines is clearly defined, facilitating precise planning of the intervention.

The cleaning step is crucial. It aims to meticulously prepare the internal surface for better resin adhesion. To this end, high-pressure cleaning is often used to remove debris and various accumulations. This is followed by complete drying, ensuring perfect resin adhesion.

The use of personal protective equipment is mandatory to secure the technicians. This notably includes thick gloves, masks, protective goggles, and special suits.

The lining process: From preparation to polymerization

The process begins with the careful preparation of the epoxy resin, tailored to the specific needs of the project. The liner, saturated with this resin, is inserted into the pipeline. The insertion method, by inversion or pulling, depends on the project's specifics.

The polymerization phase follows, where the resin is cured, creating a robust internal layer. This curing can be accelerated by various means, such as steam, hot water, or UV, depending on the nature of the resin.

Once cured, the resin establishes a new solid internal barrier. This significantly reinforces the pipeline, making it both resistant and watertight. It thus increases the structure's longevity and effectively prevents leaks.

Control and validation of the intervention

A thorough examination is carried out post-intervention to ensure the quality of the work provided. This step includes a video inspection to confirm the perfect impregnation of the resin and the tightness of the rehabilitation.

Functional tests are then conducted. They verify that the rehabilitated system operates as expected. These checks focus on flow rate and pressure, ensuring the proper functioning of the pipeline.

In conclusion, a detailed report is produced. It summarizes the work carried out and the final condition of the pipelines. This document is crucial for traceability and serves as a valuable reference for any future intervention.

Conclusion

Pipeline lining is now an essential method in the renovation of wastewater networks. This technique stands out for its durability, affordable cost, and less invasive approach compared to traditional methods.

Choosing the right equipment, while strictly following the steps from initial inspection to final evaluation, guarantees a significant improvement in the durability of your equipment. This is the perfect time to integrate lining into your future renovation projects.

Embrace this evolution in pipeline maintenance and see for yourself its undeniable advantages.