Spray Remediation: The Trenchless Protective Coating

Spray rehabilitation, also known as spray lining, is an advanced no-dig technology that involves applying a high-strength polymer coating to the inside of an existing pipe. Unlike structural relining, this method creates a seamless, waterproof protective film that seals leaks and protects the host pipe from corrosion, all without trenching and with minimal reduction in the internal diameter.

Franchini Servizi Ecologici uses this versatile technology to restore the integrity of pipelines with complex geometries, where other solutions would be impractical.

The Key Advantages of Spray Coating

This technology offers a series of unique benefits, ideal for specific problems:

• Nearly Total Diameter Maintenance: The applied resin layer is just a few millimeters thick, making the reduction in the internal cross-section negligible and preserving the original hydraulic capacity.
• Perfect for Complex Geometry: Unlike pre-formed sheaths, spray resin uniformly coats even the most complex pipes, including 90° bends, T-pieces, branches, and diameter changes.
• Maximum Adhesion and Sealing: The coating creates a monolithic, seamless ""film"" that adheres perfectly to the internal wall of the pipe, sealing micro-cracks, porosity, and defective joints.
• Active Corrosion Protection: It is the ideal solution for protecting pipes metal surfaces (e.g., cast iron) from chemical attack and corrosion, significantly extending their service life.
• Rapid Intervention: The application and curing of the resin are very fast processes that minimize plant downtime.

The Application Process: Precision and Control

An optimal result depends on meticulous surface preparation.

• Mechanical Cleaning and Drying: The preliminary phase is the most critical. The pipe is thoroughly cleaned with rotating mechanical brushes or other abrasive systems to remove all traces of sediment or corrosion, and then completely dried.
• Video Inspection: A camera verifies that the surface is perfectly clean and ready for treatment.
• Spray Application: A special rotating spray head is inserted and advanced into the pipe at a controlled speed. The head atomizes the polymer resin in uniform layers, ensuring complete coverage.
• Curing and Testing: The resin cures rapidly, often with only forced ventilation. A final video inspection certifies the quality and uniformity of the coating.

When to Choose Spray Restoration?

This technology is the winning choice for:

• Rehabilitating vertical drainpipes in residential and industrial buildings, with numerous connections and bends.
• Waterproofing pipes with widespread leaks but without structural failure.
• Protecting metal pipes from internal corrosion.
• Working on non-linear pipes where inserting a sleeve would be impossible.
• Sealing joints and connections in a non-invasive way.

The Flexible Solution to Protect and Seal Your Pipes.

If your pipes have leaks or corrosion problems in complex and inaccessible areas, spray rehabilitation may be the right technology. Contact us for a technical analysis.