API Std 650 - Threaded Roof Nozzles (mm)
| |||
|---|---|---|---|
| Nozzle
(NPS) | Coupling
(NPS) | Diameter of
Hole in Roof Plate or Reinforcing Plate \(D_P\) | Outside
Diameter of Reinforcing Plate [a]
\(D_R\) |
| 3/4 | 3/4 | 36 | 100 |
| 1 | 1 | 44 | 110 |
| 1 1/2 | 1 1/2 | 60 | 125 |
| 2 | 2 | 76 | 175 |
| 3 | 3 | 105 | 225 |
| 4 | 4 | 135 | 275 |
| 6 | 6 | 192 | 375 |
| 8 | 8 | 250 | 450 |
| 10 | 10 | 305 | 550 |
| 12 | 12 | 360 | 600 |
- American Petroleum Institute (API)
- API Std 650 - Standard for Welded Tanks for Oil Storage
