45°彎頭為管件、管道連接件。用在主管道及分支管處。用以改變管道方向。
產品參數：
| SIZE | L1 | D | R |
| DN10 | 10.7 | 12.0 | 26.0 |
| DN15 | 14.5 | 18.0 | 35.0 |
| DN20 | 16.5 | 22.0 | 40.0 |
| DN25 | 20.7 | 28.0 | 50.0 |
| DN32 | 22.8 | 34.0 | 55.0 |
| DN40 | 24.8 | 40.0 | 60.0 |
| DN50 | 29.0 | 52.0 | 70.0 |
| DN65 | 33.2 | 70.0 | 80.0 |
| DN80 | 37.3 | 85.0 | 90.0 |
| DN100 | 41.5 | 104.0 | 100.0 |
| DN125 | 77.5 | 129.0 | 187.0 |
| DN150 | 93.2 | 154.0 | 225.0 |