Flange - Weld Neck, ANSI Class 900, B16.5 RTJ (in)
- Dimensions to ASME B16.5 - Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
- Bolt circle diameters are 1/8 inch larger than bolt diameter.
Pipe Size
(NPS) | Outside Diameter of Flange
A | Thickness of Flange
C | Diameter of Bore
D | Diameter of Hub at Weld
H | Diameter of Hub at Base
J | Length of Hub
K | Diameter of Raised Face
T | Diameter of Groove
U | Groove Width
W | Groove Depth
X | Number of Bolt Holes
| Diameter of Bolt Holes
| Bolt Circle Diameter
P |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1/2 | 4 3/4 | 7/8 | * | 0.840 | 1 1/2 | 2 3/8 | 2 3/8 | 1 9/16 | 11/32 | 1/4 | 4 | 7/8 | 3 1/4 |
3/4 | 5 1/8 | 1 | * | 1.050 | 1 3/4 | 2 3/4 | 2 5/8 | 1 3/4 | 11/32 | 1/4 | 4 | 7/8 | 3 1/2 |
1 | 5 7/8 | 1 1/8 | * | 1.315 | 2 1/16 | 2 7/8 | 2 13/16 | 2 | 11/32 | 1/4 | 4 | 1 | 4 |
1 1/4 | 6 1/4 | 1 1/8 | * | 1.660 | 2 1/2 | 2 7/8 | 3 3/16 | 2 3/8 | 11/32 | 1/4 | 4 | 1 | 4 3/8 |
1 1/2 | 7 | 1 1/4 | * | 1.900 | 2 3/4 | 3 1/4 | 3 5/8 | 2 11/16 | 11/32 | 1/4 | 4 | 1 1/8 | 4 7/8 |
2 | 8 1/2 | 1 1/2 | * | 2.375 | 4 1/8 | 4 | 4 7/8 | 3 3/4 | 15/32 | 5/16 | 8 | 1 | 6 1/2 |
2 1/2 | 9 5/8 | 1 5/8 | * | 2.875 | 4 7/8 | 4 1/8 | 5 3/8 | 4 1/4 | 15/32 | 5/16 | 8 | 1 1/8 | 7 1/2 |
3 | 9 1/2 | 1 1/2 | * | 3.500 | 5 | 4 | 6 1/8 | 4 7/8 | 15/32 | 5/16 | 8 | 1 | 7 1/2 |
3 1/2 | - | - | - | - | - | - | - | - | - | - | - | - | - |
4 | 11 1/2 | 1 3/4 | * | 4.500 | 6 1/4 | 4 1/2 | 7 1/8 | 5 7/8 | 15/32 | 5/16 | 8 | 1 1/4 | 9 1/4 |
5 | 13 3/4 | 2 | * | 5.563 | 7 1/2 | 5 | 8 1/2 | 7 1/8 | 15/32 | 5/16 | 8 | 1 3/8 | 11 |
6 | 15 | 2 3/16 | * | 6.625 | 9 1/4 | 5 1/2 | 9 1/2 | 8 5/16 | 15/32 | 5/16 | 12 | 1 1/4 | 12 1/2 |
8 | 18 1/2 | 2 1/2 | * | 8.625 | 11 3/4 | 6 3/8 | 12 1/8 | 10 5/8 | 15/32 | 5/16 | 12 | 1 1/2 | 15 1/2 |
10 | 21 1/2 | 2 3/4 | * | 10.750 | 14 1/2 | 7 1/4 | 14 1/4 | 12 3/4 | 15/32 | 5/16 | 16 | 1 1/2 | 18 1/2 |
12 | 24 | 3 1/8 | * | 12.750 | 16 1/2 | 7 7/8 | 16 1/2 | 15 | 15/32 | 5/16 | 20 | 1 1/2 | 21 |
14 | 25 1/4 | 3 3/8 | * | 14.00 | 17 3/4 | 8 3/8 | 18 3/8 | 16 1/2 | 21/32 | 7/16 | 20 | 1 5/8 | 22 |
16 | 27 3/4 | 3 1/2 | * | 16.00 | 20 | 8 1/2 | 20 5/8 | 18 1/2 | 21/32 | 7/16 | 20 | 1 3/4 | 24 1/4 |
18 | 31 | 4 | * | 18.00 | 22 1/4 | 9 | 23 3/8 | 21 | 25/32 | 1/2 | 20 | 2 | 27 |
20 | 33 3/4 | 4 1/4 | * | 20.00 | 24 1/2 | 9 3/4 | 25 1/2 | 23 | 25/32 | 1/2 | 20 | 2 1/8 | 29 1/2 |
22 | - | - | - | - | - | - | - | - | - | - | - | - | - |
24 | 41 | 5 1/2 | * | 24.00 | 29 1/2 | 11 1/2 | 30 3/8 | 27 1/4 | 1 1/16 | 5/8 | 20 | 2 5/8 | 35 1/2 |