Definition - What does Structural Renovation mean?
Structural renovation, as it pertains to piping, is a trenchless technique in which the host pipe is rehabilitated in such a way that the wall of the pipe is no longer required for the integrity of the utility. In other words, properties of the wall of the host pipe such as ring stiffness, flexural strength, ductility etc. are now replaced by the material installed in the chosen pipe renovation technique.
Trenchlesspedia explains Structural Renovation
Structural renovations allow pipes to be repaired from end to end without having to remove or demolish the existing host pipe. The host pipe is simply replaced by another pipe which is installed within its inner walls.
Pipe linings, such as cured-in-place pipe (CIPP) linings, are examples of structural renovations. During CIPP, a flexible resin-saturated liner is inserted into the host pipe and pressed tightly against the pipe’s inner walls using water, steam pressure or pressurized air. Water or steam is used to quickly polymerize the resin which forms a new pipe within the host pipe. The structural properties of the host pipe are now no longer considered to be necessary for the integrity of the system.