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

Pipe lining, an innovative method of renovating sewerage networks, allows damaged pipes to be repaired effectively. This technique involves inserting a resin-impregnated sheath inside a defective pipe. Once in place, this sheath is securely attached to the original wall, creating a new, waterproof and robust inner layer.

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

But what are the different liner approaches available and how can we ensure their effectiveness? What are their specific advantages?

Moreover, how can one specialize in this technique and acquire professional certification in the field? This article aims to guide you through the answers to these questions, thus providing you with the essential elements to master pipe lining. Whether you are a construction industry player, a real estate manager or simply interested in the subject, you will find here all the data necessary to understand and apply pipe lining.

The different techniques for lining pipes

There are several techniques for lining pipes, varying according to the method of inserting the sheath, its type, and the method of hardening the resin used. Let's discover together the four main methods, each with its own specificities.

Inversion liner

This method involves inserting a felt sheath impregnated with resin into the pipe, using air or water pressure. The sheath turns back on itself, taking the exact shape of the pipe.

The resin is then hardened by heating, using steam or hot water. This is an effective solution for large diameter pipes of varying lengths.

The CIPP (Cured-In-Place Pipe) method

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

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

Partial patch liner

This technique aims to repair only the deteriorated segments of the pipeline using a patch of fiberglass or felt sheath impregnated with resin. The patch is placed at the precise location of the repair via a robot or an inflatable packer.

The resin is cured by heating or ultraviolet exposure, making this method quick, 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 which hardens at room temperature.

This approach is perfect for processing pipelines of complex configurations, different diameters and materials.

The specific advantages and applications of each technique

Each pipe lining technique offers unique benefits and is suitable for specific situations, taking into account the parameters of the pipe to be repaired, the available budget, and the expected results. Here we will compare four main techniques to guide you in choosing the most appropriate solution for your case.

Comparison: Inversion Lining vs CIPP

Inversion lining and CIPP use a similar approach, which involves applying a resin-impregnated jacket to the pipe, but differ in the jacket material: felt is used for inversion lining while fiberglass is preferred for CIPP. Your choice will depend on the trade-off between economy and desired performance.

Inversion liner is more affordable, but has more limited mechanical resistance. Conversely, CIPP, although more expensive, provides greater longevity and better resistance to chemical and biological substances.

When to use partial patch liner?

Partial patch lining is ideal for localised repair of pipes, avoiding the need to treat undamaged sections. This method is ideal when point defects, such as cracks or failed joints, are identified.

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

Innovative applications of SIPP technology

SIPP technology represents a significant advance, allowing the treatment of the interior of pipes with complex geometry or variable diameters using a robot spraying a structuring resin. It is distinguished by its adaptability, offering the possibility of treating pipes intended for different uses (drinking water, wastewater, rainwater, gas) and the creation of special coatings resistant to corrosion, abrasion, or preventing incrustations.

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

How to train in pipe lining

Pipe lining is an expertise that requires precise technical know-how and specialized knowledge. To become a professional in this field, it is crucial to follow dedicated training. The latter will equip you with the essential skills and will guarantee your compliance with the quality and safety standards in force.

This section covers how to select the ideal training, the crucial importance of the practical part of the training, the required professional certifications and qualifications, and the best sources of training.

Choosing the right training

The choice of a training course in pipe lining must be based on several essential criteria: the content of the training must encompass both the theoretical and practical aspects of the profession, including knowledge of the various types of resins and materials, specific lining techniques depending on the case, as well as safety and environmental standards. The duration of the training must also be considered for a complete assimilation of knowledge. As for the modality, it can vary between face-to-face, distance or mixed, depending on your needs and personal constraints.

The cost of training should not be overlooked, as it should fit within your budget. Taking into account feedback and opinions from former trainees can also give you perspective on the quality of training and apprentice satisfaction.

The importance of practical training

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

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

Professional certifications and qualifications

Obtaining professional certifications and qualifications constitutes official proof of your skills and knowledge in the field of pipe lining. These certificates are awarded by independent entities based on a rigorous assessment of your theoretical and practical skills.

Certifications are often a prerequisite for customers or meet specific regulatory requirements, ensuring the quality and safety of the work carried out. In France, NF390 certification is a reference standard, issued by the CSTB (Scientific and Technical Center for Building), attesting to the compliance of pipeline renovation work with current standards.

To acquire it, it is essential to follow adequate training and pass theoretical and practical exams.

Where to find quality training?

To find quality training in pipe lining, the first step is to turn to training organizations recognized in this field. The latter have qualified instructors, appropriate equipment, and complete study programs.

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

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

Conclusion

This article has guided you through the essential concepts of pipe lining. You have explored the various techniques available, their benefits, and their specific uses. In addition, you have learned how to specialize in pipe lining, a cost-effective, environmentally friendly, and quick technique for repairing sewer systems without the need for replacement or digging.

Pipe lining, requiring advanced technical knowledge and skills, has proven to be a professional field requiring dedicated training and the possession of recognized certifications. If you are interested in the field of pipe lining or if you wish 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 pipe lining sector!