| 摘要 |
PURPOSE:To prevent the generation of electrolcorrosion in a metal joint when pipes are connected by the metal joint by forming an electric insulating layer composed of a thermoplastic resin to the inner surface and/or outer surface of the pipe. CONSTITUTION:A conductive prepreg containing a thermoplastic resin as a Matrix and an electric insulating prepreg composed of a thermoplastic resin are interposed between a thermally expansible core 3 and the cylindrical outer mold 1 arranged outside the core 3. The core 3 is thermally expanded to obtain a fiber reinforced thermoplastic resin pipe. As mentioned above, since an electric insulating layer composed of a thermoplastic resin is formed to the inner surface and/or outer surface of the pipe, a metal joint becomes the state coming into contact with the electric insulating layer when the metal joint is arranged to the end parts of the pipes to connect the pipes and, therefore, the metal joint can be prevented from being deteriorated by the generation of electrocorrosion. |
