API Std 650 - Flanged Roof Nozzles (mm)
| ||||
|---|---|---|---|---|
| Nozzle
(NPS) | Outside
Diameter of Pipe Neck | Diameter of
Hole in Roof Plate or Reinforcing Plate \(D_P\) | Minimum
Height of Nozzle
\(H_R\) | Outside
Diameter of Reinforcing Plate [a]
\(D_R\) |
| 1 1/2 | 48.3 | 50 | 150 | 125 |
| 2 | 60.3 | 65 | 150 | 175 |
| 3 | 88.9 | 92 | 150 | 225 |
| 4 | 114.3 | 120 | 150 | 275 |
| 6 | 168.3 | 170 | 150 | 375 |
| 8 | 219.1 | 225 | 150 | 450 |
| 10 | 273 | 280 | 200 | 550 |
| 12 | 323.8 | 330 | 200 | 600 |
- American Petroleum Institute (API)
- API Std 650 - Standard for Welded Tanks for Oil Storage
