Internal Pipe Cleaning and Preparation — The Foundation for Long-Lasting Rehabilitation

Prepare today to protect tomorrow

Before applying the internal epoxy coating, it is essential to ensure that the pipe walls are completely clean, dry, and uniform.
At REVIPOX, we perform mechanical cleaning and internal preparation of pipelines using specialized technology that ensures perfect adhesion and maximum durability of the epoxy lining.

In Portugal, most sewer networks are made of stoneware or plastic pipes (PVC and PP), especially in newer urban areas. In the older parts of cities like Lisbon, Porto, or Coimbra, we still find many vitrified clay pipes, with aged joints that have weakened over time. Each material requires a different approach during internal cleaning and preparation. Plastic pipes, for example, cannot withstand the same pressure as stoneware and must be cleaned with equipment that allows precise control of force and temperature to avoid deformation. Stoneware, on the other hand, is mechanically strong but fragile at the joints and can crack if hit directly. That’s why we use adjustable tools, brushes suited to each diameter, and controlled pressure — ensuring a thorough cleaning without compromising the pipe’s integrity.

This preparation stage is what separates a simple repair from a professional and long-lasting rehabilitation.
Every step is carried out by experienced technicians using rotary brushes, controlled jetting, and forced drying, restoring the internal condition of the pipeline to guarantee optimal bonding of the epoxy layer.

How the cleaning process works

1. Initial video inspection: before starting the cleaning, we assess the pipe’s interior to locate corrosion, debris, and critical sections.

2. Rotary mechanical brushing: we use calibrated brushes that remove rust, scale, grease, and deposits without damaging the pipe walls.

3. Jet cleaning and internal polishing: when necessary, we perform controlled jetting with fine abrasives to create a smooth, uniform surface.

4. Drying and final verification: after cleaning, the pipe is dried with compressed air and re-inspected to ensure a clean, adhesive-ready surface.

Benefits of REVIPOX internal cleaning and preparation

• Superior adhesion for the epoxy coating

• Extended durability and corrosion resistance

• Complete removal of old deposits and residues

• Reduced risk of future leaks or ruptures

• Fast, clean, and non-invasive process

When this service is needed

A slight abrasion of the internal pipe walls is an essential step before continuous epoxy application. This process removes scale, old grease, and small loose layers of limestone or rust that would prevent the resin from fully bonding. It also creates a slightly rough surface, ideal for mechanical adhesion of the new coating. Without this preparation, the resin could form a thin film over debris, reducing the system’s durability and watertightness. The goal isn’t to wear down the pipe but to ensure the epoxy bonds evenly and permanently, making the new inner wall an integral part of the original structure.

Internal cleaning and preparation is recommended before any epoxy internal coating or pipeline rehabilitation, especially in:

• Aged galvanized, copper, or PVC pipes

• Vertical risers in residential and commercial buildings

• Buried pipes with accumulated residue

• Industrial or commercial conduits exposed to chemicals or temperature changes

Preparation means intelligent rehabilitation

At REVIPOX, we believe that the longevity of a rehabilitated pipeline depends on the quality of its preparation.
That’s why every project is executed with precision tools and technical rigor, ensuring that the epoxy coating bonds perfectly and remains effective for decades.

REVIPOX — Prepare today to protect tomorrow.