Why carbon fibre rather than something like fibreglass? I would think it'd be a fair bit cheaper, and I wouldn't think you'd need that much strength/weight savings in something like a drain pipe. Carbon fibre is pretty cool though. Just kind of curious.
I guess His company deals with serious stuff, including nuclear power plants and other energy plants. I can't answer your question, but I cut and pasted this from his company's website:
"Carbon Fiber Reinforced Polymer
A more recent technology is now available that can increase the life cycle of components and structures, while significantly reducing the economic burden normally associated with repair or replacement options. This technology is known as “Carbon Fiber Reinforced Polymers” or CFRP.
CFRP utilizes carbon fibers and high strength epoxy resins to restore or enhance the structural and or pressure boundary capacity of pipe and structures. This process utilizes the high strength of the carbon fibers to add additional structural capacity to the existing component.
The material condition of the component determines the orientation of the fibers to add strength in the direction of static and or dynamic loading. The repairs to the affected items are performed in-place and completed during relatively short durations. Small crews perform the work and can do internal strengthening with access as small as a manhole. The technology and engineering associated with CFRP repair methods provides an effective mechanism to rehabilitate structural steel, concrete, pressure piping, storm drains, potable water piping, pumps, heat exchangers, water boxes, bridges and numerous other items while minimizing the cost typically associated with direct replacement. CSI utilizes a CFRP repair system known as “C-Wrap” to internally and externally wrap pipes in commercial and industrial environments."