| 摘要 |
In concrete pipes 2, having a corrosion-resistant inner lining, said lining is a plastic pipe 9 which is resistant to acidic sewage and whose one end part is constructed as a pipe tip end part 3, the other end being constructed as a pipe sleeve end part 4 for holding the tip end part 3, the plastic pipe projecting on its inner side in each case over the concrete pipe or the concrete surround 2, with an overhang 5, as an adjustment and connection aid for the perfect joining of the individual pipes to one another, it being possible to support their ends 9 on a circumferential step 8 on the inner wall 6 of the respectively following plastic pipe. Arranged between the plastic pipe sleeve end 12 and the step 8, in the inner wall 6, is a circumferential groove in which an annular seal 14, consisting for example of latex and the like, is mounted. Furthermore, annular seals 15 are also provided to ensure perfect sealing, in each case between the outer concrete walls 23 and the inner concrete walls 24. <IMAGE> |
