Сompensates for axial thermal extension of chimney and is used as a pipe of non-standard length.
It is used exclusively for horizontal sections.
| D, mm | L = 1 m | L = 0,5 m |
| Weight, kg | ||
| 100 | 1,54 | 0,77 |
| 110 | 1,69 | 0,85 |
| 115 | 1,77 | 0,89 |
| 120 | 1,84 | 0,92 |
| 125 | 1,92 | 0,96 |
| 130 | 1,99 | 1 |
| 135 | 2,07 | 1,04 |
| 140 | 2,15 | 1,08 |
| 150 | 2,3 | 1,15 |
| 160 | 2,45 | 1,23 |
| 180 | 2,75 | 1,38 |
| 200 | 3,06 | 1,53 |
| 220 | 3,36 | 1,68 |
| 230 | 3,51 | 1,76 |
| 250 | 3,82 | 1,91 |
| 300 | 4,58 | 2,29 |