Threaded Flange
The threaded flange (THDF) is similar to a slip-on flange, but has internal threads. It is normally used for low pressure and not used where temperature or stress is very high. This flange has a raised face.


This is the size differences between a 150 to 2500, 4″ threaded flange (THDF).
- ASME B16.5 are flanges for sizes 1/2″ to 24″.
- ANSI/ASME B16.36 are orifice flanges for sizes 1/2″ to 24″.
- Flange – Threaded, ANSI Class 150, B16.5
- Flange – Threaded, ANSI Class 150, B16.5 RJF
- Flange – Threaded, ANSI Class 300, B16.5
- Flange – Threaded, ANSI Class 300, B16.5 RJF
- Flange – Threaded, ANSI Class 400, B16.5
- Flange – Threaded, ANSI Class 400, B16.5 RJF
- Flange – Threaded, ANSI Class 600, B16.5
- Flange – Threaded, ANSI Class 600, B16.5 RJF
- Flange – Threaded, ANSI Class 900, B16.5
- Flange – Threaded, ANSI Class 900, B16.5 RJF
- Flange – Threaded, ANSI Class 1500, B16.5
- Flange – Threaded, ANSI Class 1500, B16.5 RJF
- Flange – Threaded, ANSI Class 2500, B16.5
- Flange – Threaded, ANSI Class 2500, B16.5 RJF