Pipeline repair by lining: complete guide

Pipeline renovation is a major concern for water owners and managers. Pipeline lining is an innovative technique. It offers a sustainable alternative to conventional replacement methods. This article explains the pipeline lining process. This method is recognized in France and elsewhere.

We will cover what pipeline lining is, the steps of the process, its advantages, and the elements to consider before starting this work. This article is intended for professionals in the field and those interested in this technology. It aims to provide a clear understanding of pipeline lining.

What is pipeline lining?

Pipeline lining is a renovation process that avoids the complete replacement of pipelines. It involves inserting a liner, often made of fiberglass or felt, impregnated with epoxy or polyester resin, into the damaged pipeline. Once in place, this resin hardens, forming a new resistant and waterproof inner layer.

This method is suitable for pipelines that are difficult to access or under infrastructures, where replacing pipes would be too disruptive and costly. It allows for pipeline renovation without disturbing the environment or the daily lives of affected people and businesses.

In France, this solution is favored for its speed and efficiency. Specialized companies use advanced technologies to inspect, clean, and restore pipelines with minimal disruption.

The principle of lining

Lining creates a new pipeline inside the old one without the need to dig. The chosen liner adapts to the size and shape of the existing pipeline. The applied resin hardens and adheres to the pipeline, repairing leaks and cracks.

This process restores the strength of the pipeline and improves fluid flow. It is also resistant to chemicals and corrosion, increasing the lifespan of the infrastructure.

The process takes place in several phases: camera inspection, high-pressure cleaning, insertion of the impregnated liner, and finally, resin curing, often by steam or UV light.

Advantages: ecological and economic

Lining offers ecological and economic benefits. By avoiding excavations, it limits the environmental impact of repairs, without generating waste or altering the landscape.

Economically, this method costs less than complete pipeline replacement. It also reduces indirect costs and minimizes inconvenience for users due to its speed.

Network owners and managers thus benefit from savings while ensuring the reliability and safety of repaired pipelines.

Types of pipelines concerned

Lining applies to various types of pipelines, including those for sanitation, drinking water, stormwater, or industrial effluents. Compatible with several materials, it adapts well to non-accessible pipelines as well as long lengths or sections with bends.

In conclusion, lining is a versatile option for the repair and renovation of pipeline networks, contributing to their sustainable management.

The lining process: step by step

Preliminary evaluation and diagnosis

An initial video inspection is crucial to assess the condition of the pipeline. It helps identify damage and obstructions. This step determines if lining is feasible and helps organize subsequent operations.

Technicians then analyze the severity of the damage and choose an appropriate lining method. They consider various factors such as the diameter and material of the pipeline. This analysis allows estimating costs and duration of the work.

An action plan is developed, selecting appropriate lining materials and techniques. The results of this phase are recorded in a report, which guides the project.

Cleaning and preparation of the pipeline

Cleaning the pipeline is essential before applying the lining. This cleaning, often by high pressure, removes debris and obstructions, ensuring resin adhesion.

The pipeline is then dried to optimize adhesion. Techniques such as using steam or hot air facilitate this drying.

This phase also includes checking the alignment and integrity of the pipeline. Anomalies are corrected before moving on to the next step.

Lining application and drying time

The preparation of the epoxy resin precedes the insertion of a resin-impregnated liner into the pipeline. The liner is introduced by inversion or pulling, depending on the case.

After placement, the resin must cure, a process that can be accelerated by heat. Drying depends on various factors such as temperature and humidity.

Respecting the drying time is vital for the durability and tightness of the lining.

Final inspection and work validation

A final camera inspection verifies the quality of the lining. It confirms the absence of defects and the tightness of the pipeline.

Tests guarantee that the lining meets requirements. This may include pressure tests.

A completion report documents and confirms the quality of the intervention, ensuring traceability.

Important advantages and considerations

Advantages of lining for pipeline repair

Pipeline lining offers several advantages. It is less invasive than traditional methods, avoiding excavation and its nuisances. This technique repairs without damaging the surrounding environment, useful in dense urban areas or near historical sites with limited digging.

This method is also economical. It reduces labor and material costs by avoiding pipeline replacement. The work is quick, reducing indirect costs due to daily disruptions for residents and businesses.

Moreover, lining improves the pipeline. It reinforces pipelines with resin liners, increases their durability, and reduces the risk of future problems such as leaks.

Longevity and durability of lining

Longevity and durability are essential to lining. Materials like epoxy resins resist chemicals and corrosion, extending the life of pipelines. These resins ensure mechanical strength and maintain flow capacity over the long term.

Lining withstands temperature variations and pressures, adapting to different contexts and fluids. Its durability minimizes future repairs, saving costs in the long term.

It adapts to various sizes and shapes of pipelines, making it versatile for many sanitation projects.

When to consider lining? Situations and diagnostics

Lining is suitable for pipelines with cracks, intrusive roots, or defective joints. It is preferable when usual methods are ineffective or costly.

A video inspection is crucial before choosing lining. It identifies damage and assesses the condition of the pipelines.

Lining is also preventive, extending the life of pipelines, especially under difficult conditions or intensive use.

Conclusion

Pipeline lining is a significant innovation in infrastructure management. It is economical, environmentally friendly, and offers a sustainable solution, reducing interruptions. In the context of current sanitation needs, lining represents an essential response. It is time to choose this method to keep your pipelines in good condition. Lining ensures the performance and durability of networks in the face of contemporary challenges.