| 摘要 |
First (1) and second (2) pipes and a sleeve (3) are produced with a thermoplastic material. The second pipe can be inserted into the sleeve with its tip end (4) and has ribs with flanges (10) extending in a peripheral direction on the outer surface (5) of the tip end. Between the sleeve and the second pipe's tip end between adjacent ribs there is a welding ring (7) made with thermoplastic material and a device as electric resistance heating with a connecting pipe. An independent claim is also included for a method for producing a permanent load-bearing welded joint impervious to substances so as to provide a joint with longitudinal force in a pipe with a sleeve with thermoplastic material by using a pipe coupling. |
