API Std 650 - Threaded Roof Nozzles (in)
| |||
|---|---|---|---|
| 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 | 1 7/16 | 4 |
| 1 | 1 | 1 23/32 | 4 1/2 |
| 1 1/2 | 1 1/2 | 2 11/32 | 5 |
| 2 | 2 | 3 | 7 |
| 3 | 3 | 4 1/8 | 9 |
| 4 | 4 | 5 11/32 | 11 |
| 6 | 6 | 7 17/32 | 15 |
| 8 | 8 | 9 7/8 | 18 |
| 10 | 10 | 12 | 22 |
| 12 | 12 | 14 1/4 | 24 |
- American Petroleum Institute (API)
- API Std 650 - Standard for Welded Tanks for Oil Storage
