Slip-on Flange
Slip-on flanges (SOF) are designed to slip over the outside of pipe, long-tangent elbows, reducers, and swages. The flange has poor resistance to shock and vibration. It is easier to align than a weld neck flange. This flange is ideal for low pressure applications since the strength when under internal pressure is about one third that of a weld neck flange. This flange has a raised face.


This is the size differences between a 150 to 2500, 4″ slip-on flange (SOF).
- 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 – Slip-on, ANSI Class 75, Industry Standard
- Flange – Slip-on, ANSI Class 150, B16.5
- Flange – Slip-on, ANSI Class 150, B16.5 RJF
- Flange – Slip-on, ANSI Class 300, B16.5
- Flange – Slip-on, ANSI Class 300, B16.5 RJF
- Flange – Slip-on, ANSI Class 400, B16.5
- Flange – Slip-on, ANSI Class 400, B16.5 RJF
- Flange – Slip-on, ANSI Class 600, B16.5
- Flange – Slip-on, ANSI Class 600, B16.5 RJF
- Flange – Slip-on, ANSI Class 900, B16.5
- Flange – Slip-on, ANSI Class 900, B16.5 RJF
- Flange – Slip-on, ANSI Class 1500, B16.5
- Flange – Slip-on, ANSI Class 1500, B16.5 RJF
- Flange – Slip-on, ANSI Class 2500, B16.5
- Flange – Slip-on, ANSI Class 2500, B16.5 RJF