Hydroelectric Facility Penstock Rehabilitation

Aging steel penstocks built nearly a century ago face severe operational threats, including saddle support cracking, thermal buckling, and severe wall thinning due to internal cavitation and corrosion. Traditional full-pipeline replacements require extensive excavation, prolonged facility shutdowns, and massive capital expenditures.

By utilizing engineered Fiber-Reinforced Polymer (FRP) structural liner systems, hydroelectric facility operators can fully restore structural integrity without total replacement. Tailored Class IV stand-alone liners operate independently of the host pipe, bearing internal hydrostatic pressure and external earth loads without relying on deteriorated steel substrates. To prepare legacy riveted pipelines for composite application, thickened epoxy smooths irregular topographies and rivet heads, while specialized dielectric barrier layers prevent galvanic corrosion between carbon fiber and steel. Review the full case study to see how trenchless composite lining techniques successfully return aging power generation infrastructure to full capacity.