150# Butterfly Flange - Threaded
Threaded flanges are joined to pipes by screwing the pipe (which has a male NPT thread) onto the flange, without seam welds. In certain cases small welds may be applied to increase the strength of the connection.
| Nominal Pipe Size | Flange O.D. | Diameter of Bolt Circle | Number of Bolts |
|---|---|---|---|
| 3" | 7-1/2" | 6" | 4 |
| 4" | 9" | 7-1/2" | 8 |
| 6" | 11" | 9-1/2" | 8 |
| 8" | 13-1/2" | 11-3/4" | 8 |
