| 摘要 |
A pipe 10 for conveying fluids, the pipe comprising a tubular member 16 formed of a plastics material and a plurality of electrically conductive materials dispersed in the plastics material for increasing the electrical conductivity of the tubular layer. Preferably an electrical power source 22 is connected to the ends of the tubular member via an electrical conductor 24, so that when electrical power is supplied from the source the current flows through the conductive materials to heat the pipe. The conducting materials may be carbon nanotubes having a length to diameter ratio greater than 800. The nanotubes may be single walled or have multiple walls. The tubular layer may surround or be surrounded by a tubular plastics layer, and/or a tubular armour layer. The tubular layer preferably surrounds a tubular carcass layer 12. Also claimed is a method of manufacturing such a pipe. |
