Tube installation

Sukk_290911_whiteTube installation is known as the CIPP method – cured in place pipe. This is a pipe renovation method where a felt tube saturated with a special resin mix is inserted in the existing pipe with pressurized air or water pressure. When the base material has been inserted in the existing pipe, heating with steam, water or air begins. During the heating, the base (tube) hardens against the wall of the old pipe and forms a new durable pipe within the old pipe.

This method also enables to renovate vertical pipes.

Different base materials enable to renovate the following pipe systems: main lines, house connections, vertical pipes within the house and local fixes.

Pros (+) Cons (-)
Does not require trenches Performing the works is difficult below -5°C
Large length of installation  Overpumping required
Minimal disturbance of traffic and residents
Environmentally friendly materials
Stops roots from growing into pipes
Optimal cost
No need to dig in locations of joints

Tube installation of the main pipeline

Enables to renovate longer sections of pipes (up to 300 m) – length of installation depends on the specific object. The section of main pipeline to be renovated is closed and overpumping is done if necessary. The felt tube is saturated with resin mix either directly at the object or in the factory. After the saturation process, the tube is inserted in the old pipe via a special drum with pressurized air or water pressure.

In the next stage, the tube is heated (with hot air or water). With the increase of the temperature, a reaction takes place in the resin and it begins to harden. Depending on the diameter and length of the tube and the heating technology, hardening takes at least 2 hours. After hardening, the tube is cooled down and only then are the ends of the tube opened and the tube is cut loose from intermediate wells. In the case of blind connections, they are milled open with a special milling robot. Post-installation camera observation is performed and the renovated pipeline is opened for use.

Tube installation for house connection pipes

Tube installation for house connection pipe differs from tube installation of the main utility line only in materials and only air is used for heating. The materials also enable to renovate pipe systems with so-called elbows and minor changes in the diameter of the pipe.

Analogously with tube installation for a main utility line, digging is generally not necessary – only one location for inserting the tube is needed. It is also possible to renovate so-called blind house connections without digging. In this case, the tube must be inserted from the well on the side of the house or the basement.

Sukk - kohtparandusLocal repairs

Local repairs are used for locations where a part of the piping system has been damaged – a corrosion-proof glass fiber fabric saturated with a silicate and resin mix is placed on part of the pipe. Placing occurs with a special container used to move to the damaged spot. Pressurized air is used to push saturated fabric against the damaged pipe section in the entire perimeter and the saturated fabric hardens against the wall of the pipe.

The entire procedure is checked via a video camera. Diggings are not needed for installation if the size of wells enables to insert the container

Pimeühenduste renoveerimineRenovating blind connections (TopHats)

After the installation of a main utility line tube, it is always reasonable to also renovate the so-called blind connections. If that is not done, then one of the most important goals of renovating the main utility line is not ensured – removal of infiltration into the pipe. The TopHats method enables to renovate blind connections without digging. For that, a “hat” is installed on the connection from the utility line end (reaches into the house connection pipe system by 30 cm) which makes the connection watertight and ensures the necessary strength of the part of pipe system.