Our Expanda system can be used to rehabilitate pipes ranging from Dia. 300mm to Dia. 600mm. The advantage of this system is that the lining can still be carried out even with high sewerage flow.

The profile is fed from the spool into the Expanda Pipe Winding machine. The Expanda Pipe Winding machine drives the profile into the attached winding head where the profile is wound to form a pipe with an outside diameter smaller than
the inside diameter of the host pipe. After the profile has been fed into the Rib Loc winding machine, it is lowered to the base of the access chamber. Winding is stopped when the wound pipe reaches the upstream access chamber. The end of the Expanda Pipe is then torsionally restrained by drilling two
holes through the end of the liner and inserting a bar through the holes.

Expansion of the liner commences with the pulling of the cutting wire, severing the secondary (sacrificial) lock. As the cutting wire is progressively removed, more profile is wound into the line. The lubricating sealant in the primary lock
allows adjacent profile wraps to slide relative to each other.
In response to the additional profile, the liner expands in
diameter to fit tightly against the inside wall of the
deteriorated pipe.

The process continues until the liner has been expanded for the full length of the deteriorated pipeline between manholes. Just prior to the full expansion an end seal is placed around the liner, so that when expansion is complete, an end seal is
in place. The entire lining process is then considered complete.