MultiLiner^® Installation Procedure

• Prior to the relining process the pipe has to be cleaned, and any protruding elements must be removed. Furthermore all protruding lateral connections have to be grinded and measured. 

• The liner is taken out of the transportation container, and length and wall thickness are checked.

• The MultiLiner^® manifold is mounted in the end of the liner that is being pulled into the pipe.  

DN 18"/450 mm MultiLiner^® is prepared for installation.

• A pulling guard is mounted, and a device that ensures removal of condensation water is put in place.  

• If a pre-liner or sliding foil is used it is installed in the pipe at this time, and it is attached with a plug in the manhole from which the liner is installed.  

• The invert roller for the winch is mounted. This device protects the steel cable when the liner is pulled in, and it makes sure that the liner can be pulled far enough into the manhole where you are pulling from.  

• The winch is attached to the pulling guard on the MultiLiner manifold.
   
• The liner is folded to half of its width, before it is fed into the manhole.
   
• 3 persons are normally required when the MultiLiner^® is pulled in. 2 persons to feed the MultiLiner^® into the manhole, and one person inside the manhole to guide it in. It normally takes approx. 20 - 25 minutes to pull 330 ft. (100 meters) of DN 6" - 18" (DN 150mm - 450mm)  MultiLiner^® into place. 
   

A DN16"/400mm MultiLiner^® is folded and pulled in.

• The liner is pulled through the pipe, until the pulling end of the MultiLiner^® reaches the middle of the manhole.

The MultiLiner^® is pulled through

• The MultiLiner^® is cut off in the exact length, the safety covering is mounted and the remaining manifold is mounted.  

• The inner and outer temperature sensors are mounted in both manholes as well as a pressure sensor hose is mounted in the upstream manhole. 

• The special inlet steam hose is mounted to the MultiLiner^® manifold in the upstream manhole and connected to the MultiLiner^® installation unit. The special outlet steam hose is mounted to the MultiLiner^® manifold in the downstream manhole and connected to the gauge station above the manhole.  

The MultiLiner^® is inflated using the combined steam/air hoze.
Note the pressure sensor hose and temperature sensor wires.

The combined steam/air hose is connected to the outlet gauge station. 

• Prior to starting the installation procedure all temperature sensors and hoses are checked in the installation unit, i.e. whether they are functioning as well as whether they are placed correctly in the manholes.  

• The liner is inflated with air only up to a certain inner pressure.