Fluid Jet Cut

See Jet Cutting.

Fluid-Assisted Boring/Drilling

A type of guided boring technique using a combination of mechanical drilling and pressurized fluid jets to provide the soil cutting action.

Fluorescein Dye

A potent Kelly-green fluorescent water dye used to “color” waste streams and identify their flow paths (flow path verification).

Fold and Form Lining

Method of pipeline rehabilitation in which a liner is folded to reduce its size before insertion and reversion to its original shape by the application of pressure and/or heat. See also Lining with Close-Fit PipesMethod of lining with a continuous pipe for which the cross section is reduced to facilitate installation, and reverted after installation to provide a close fit to the existing pipe..

Fold and Form Pipe

A pipe rehabilitation method where a plastic pipe manufactured in a folded shape of reduced cross-sectional area is pulled into an existing conduit and subsequently expanded will. pressure and heat. The reformed plastic pipe fits snugly to and takes the shape of the ID of the host pipe.