90°弯头为管件、管道连接件。用在主管道及分支管处。用以改变管道方向。
产品参数：
| SIZE | L1 | D | R |
| DN10 | 26.0 | 12.0 | 26.0 |
| DN15 | 35.0 | 18.0 | 35.0 |
| DN20 | 40.0 | 22.0 | 40.0 |
| DN25 | 50.0 | 28.0 | 50.0 |
| DN32 | 55.0 | 34.0 | 55.0 |
| DN40 | 60.0 | 40.0 | 60.0 |
| DN50 | 70.0 | 52.0 | 70.0 |
| DN65 | 80.0 | 70.0 | 80.0 |
| DN80 | 90.0 | 85.0 | 90.0 |
| DN100 | 100.0 | 104.0 | 100.0 |
| DN125 | 187.5 | 129.0 | 187.0 |
| DN150 | 225.0 | 154.0 | 225.0 |
| DN200 | 300.0 | 204.0 | 300.0 |
| DN250 | 375.0 | 254.0 | 375.0 |
| DN300 | 450.0 | 306.0 | 450.0 |