What are the different pipe lining techniques? How to train in pipe lining? The Doc tells you everything

Pipeline lining, an innovative method for renovating sanitation networks, allows for effective repair of damaged pipelines. This technique consists of inserting a resin-impregnated liner inside a defective pipeline. Once in place, this liner firmly adheres to the original wall, thus creating a new, watertight, and robust inner layer.

This solution offers a way to rehabilitate pipelines affected by leaks, cracks, deformations, infiltrations, or even roots, without the need to replace them or carry out excavation work. Thanks to its economical, ecological nature and quick implementation, lining is suitable for various types of pipelines, including those made of PVC, cast iron, clay, or concrete.

But what are the different available lining approaches and how can their effectiveness be ensured? What are their specific advantages?

Furthermore, how can one specialize in this technique and obtain professional certification in the field? This article aims to guide you through the answers to these questions, providing you with the essential elements to master pipeline lining. Whether you are a construction professional, a property manager, or simply interested in the subject, you will find here all the necessary information to understand and apply pipeline lining.

The different pipe lining techniques

Several techniques allow for pipeline lining, varying according to the insertion method of the liner, its type, and the resin curing method used. Let's explore together the four main methods, each with its own specifics.

Inversion lining

This method involves inserting a felt liner impregnated with resin into the pipeline, using air or water pressure. The liner turns inside out, taking the exact shape of the pipeline.

The resin curing is then carried out by heating, using steam or hot water. This is an effective solution for large-diameter pipes and varying lengths.

The CIPP (Cured-In-Place Pipe) method

Similar to inversion lining, the CIPP method uses a fiberglass liner instead of felt, also impregnated with resin and introduced by inversion.

The curing process is done either by heating (steam, hot water) or ultraviolet radiation, thus offering better mechanical resistance and increased durability.

Partial patch lining

This technique aims to repair only the deteriorated segments of the pipe using a patch of fiberglass or felt liner impregnated with resin. The patch placement is done precisely at the repair location via a robot or inflatable packer.

The resin is cured by heating or ultraviolet exposure, making this method fast, economical, and ideal for small-diameter pipes.

SIPP (Sprayed-In-Place Pipe) technology

Innovative, SIPP technology consists of spraying a structuring resin onto the internal walls of the pipe using a robot, thus forming a uniform layer that hardens at room temperature.

This approach is perfect for treating pipes with complex configurations, different diameters, and materials.

The specific advantages and applications of each technique

Each pipe lining technique offers unique advantages and suits specific situations, considering the parameters of the pipe to be repaired, the available budget, and the expected results. We will compare four main techniques here to guide you in choosing the most appropriate solution for your case.

Comparison: inversion lining vs CIPP

Inversion lining and the CIPP method use a similar approach, involving the application of a resin-impregnated liner inside the pipe, but differ in the liner material: felt is used for inversion lining while fiberglass is preferred for CIPP. Your choice will depend on the trade-off between cost savings and desired performance.

Inversion lining is more financially accessible but has more limited mechanical resistance. Conversely, CIPP, although more expensive, ensures superior longevity and better resistance to chemical and biological substances.

When to use partial patch lining?

Partial patch lining is ideal for localized pipe repairs, thus avoiding treating undamaged sections. This method is perfectly suited when pinpoint defects, such as cracks or faulty joints, are identified.

Efficient, economical, and perfectly suited for small diameters, patch lining restores the functionality of the pipeline without altering its diameter or flow. This technique is applicable on various materials, such as PVC, cast iron, clay, or concrete.

Innovative applications of SIPP technology

SIPP technology represents a significant advancement, allowing treatment of the interior of pipelines with complex geometry or variable diameters thanks to a robot projecting a structuring resin. It is characterized by its adaptability, offering the possibility to treat pipelines intended for different uses (drinking water, wastewater, stormwater, gas) and the creation of special coatings resistant to corrosion, abrasion, or preventing encrustations.

This method stands out for its flexibility, effectively meeting a wide range of needs and constraints.

How to train in pipeline lining

Pipeline lining is an expertise requiring precise technical know-how and specialized knowledge. To become a professional in this field, it is crucial to follow dedicated training. This will equip you with the essential skills and ensure your compliance with current quality and safety standards.

This section addresses how to select the ideal training, the crucial importance of the practical part of the training, the required certifications and professional qualifications, as well as sources of top-quality training.

Choosing the right training

The choice of pipeline lining training should be based on several essential criteria: the training content must cover both theoretical and practical aspects of the profession, including knowledge of various types of resins and materials, specific lining techniques depending on the cases, as well as safety and environmental standards. The duration of the training should also be considered for a complete assimilation of knowledge. As for the modality, it can vary between in-person, remote, or blended, according to your personal needs and constraints.

The cost of training should not be overlooked, as it must fit your budget. Considering feedback and reviews from former trainees can also provide you with insight into the quality of the training and the satisfaction of the learners.

The importance of practical training

The practical component of the training is crucial: it introduces you to the use of equipment, handling of various resins and materials, performing lining on real or simulated models, and quality control of interventions. It represents an invaluable opportunity to apply your theoretical knowledge, improve your technical skills, and gain confidence and autonomy.

It must be supervised by experienced and competent trainers, ready to guide and advise you at every stage of your learning.

Certifications and professional qualifications

Obtaining certifications and professional qualifications constitutes official proof of your skills and knowledge in the field of pipeline lining. These attestations are granted by independent entities based on a rigorous evaluation of your theoretical and practical abilities.

Certifications are often a prerequisite for clients or meet specific regulatory requirements, ensuring the quality and safety of the work performed. In France, NF390 certification is a reference standard, issued by CSTB (Scientific and Technical Center for Building), certifying that pipeline renovation work complies with current standards.

To acquire it, following adequate training and passing theoretical and practical exams is essential.

Where to find quality training?

To find quality training in pipeline lining, the first reflex is to turn to recognized training organizations in this field. They have qualified instructors, appropriate equipment, and comprehensive study programs.

Customized training can be offered based on your specific professional goals. Among the reference organizations, KIT CANALISATIONS stands out for its comprehensive lining training programs, including the possibility of obtaining NF390 certification.

The Docteur Canalisation website is also a valuable resource, offering advice and information on pipeline lining and available training options.

Conclusion

This article has guided you through the essential concepts of pipeline lining. You have explored the various available techniques, their advantages, and their specific uses. Additionally, you have learned how one can specialize in pipeline lining, a technique that is economical, environmentally friendly, and quick for repairing sanitation networks without the need to replace or dig them up.

Pipeline lining, requiring advanced technical knowledge and skills, has proven to be a professional field that demands dedicated training and recognized certifications. If you are interested in pipeline lining or want to deepen your knowledge, we have directed you to specialized training centers to consult.

Don't miss out on the great opportunities offered by the pipeline lining sector!