| 摘要 |
Polyethylene pipe with integrated electric resistance thermowelding system, including a substantially cylindrical socket (3) at one of its ends and a wire coil resistor (4) housed therein, the axial length of which does not exceed that of said socket (3), and whose outside diameter practically coincides with the inside one of said socket; the inside diameter of the resistor (4) equals, but for a small clearance, the outside diameter of the pipe (2), so that the two pipe ends (1 and 2) are complementary. Pipe can be joined by thermowelding to an equal, adjacent pipe section or to a fitting having at least one complementary end, by simply inserting the plain end into the bell-shaped end containing the resistor, and by supplying electric power to said resistor, so as to obtain a heat-fused joint. |
