Dimensions to ASME B16.36 - Orifice Flanges- Bolt circle diameters are 1/8 inch larger than bolt diameter.
- All dimensions except "Thickness of Flange C sizes 1" are the same as a Weld Neck.
- Approximate weight is based on a orifice flange union which is a set of flanges, plate not included.
- * To be specified by purchaser.
Flange - Orifice, Weld Neck, ANSI Class 2500, B16.36 (in) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe
Size (NPS) | Outside
Diameterof Flange A | Diameter
ofRaised Face B | Thickness
of Flange
| Diameter
of Bore
| Diameter
of Hubat Weld H | Diameter
of Hubat Base J | Length
of Hub
| Number
of Bolt Holes NBH | Diameter
of Bolt Holes DBH | Bolt
Circle Diameter P | Approx.
Weight per Union (lb) AW |
| 1/2 | - | - | - | - | - | - | - | - | - | - | - |
| 3/4 | - | - | - | - | - | - | - | - | - | - | - |
| 1 | 6 1/4 | 2 | 1 1/2 | * | 1.315 | 2 1/4 | 3 1/2 | 4 | 1 | 4 1/4 | - |
| 1 1/4 | 7 1/4 | 2 1/2 | 1 1/2 | * | 1.660 | 2 7/8 | 3 3/4 | 4 | 1 1/8 | 5 1/8 | - |
| 1 1/2 | 8 | 2 7/8 | 1 3/4 | * | 1.900 | 3 1/8 | 4 3/8 | 4 | 1 1/4 | 5 3/4 | - |
| 2 | 9 1/4 | 3 5/8 | 2 | * | 2.375 | 3 3/4 | 5 | 8 | 1 1/8 | 6 3/4 | - |
| 2 1/2 | 10 1/2 | 4 1/8 | 2 1/4 | * | 2.875 | 4 1/2 | 5 5/8 | 8 | 1 1/4 | 7 3/4 | - |
| 3 | 12 | 5 | 2 5/8 | * | 3.500 | 5 1/4 | 6 5/8 | 8 | 1 3/8 | 9 | - |
| 3 1/2 | - | - | - | - | - | - | - | - | - | - | - |
| 4 | 14 | 6 3/16 | 3 | * | 4.500 | 6 1/2 | 7 1/2 | 8 | 1 5/8 | 10 3/4 | - |
| 5 | 16 1/2 | 7 5/16 | 3 5/8 | * | 5.563 | 8 | 9 | 8 | 1 7/8 | 12 3/4 | - |
| 6 | 19 | 8 1/2 | 4 1/4 | * | 6.625 | 9 1/4 | 10 3/4 | 8 | 2 1/8 | 14 1/2 | - |
| 8 | 21 3/4 | 10 5/8 | 5 | * | 8.625 | 12 | 12 1/2 | 12 | 2 1/8 | 17 1/4 | - |
| 10 | 26 1/2 | 12 3/4 | 6 1/2 | * | 10.750 | 14 3/4 | 16 1/2 | 12 | 2 5/8 | 21 1/4 | - |
| 12 | 30 | 15 | 7 1/4 | * | 12.750 | 17 3/8 | 18 1/4 | 12 | 2 7/8 | 24 3/8 | - |
