This datasheet is for flanges that have a ring type joint (RTJ) end connection. Additional in depth information about these kinds of flanges can be found on the Ring Type Joint page.- Dimensions and tolerances in accordance with ANSI/ASME B16.5 for sizes 1/2" to 24".
- ASME B1.20.1 - Pipe Threads, General Purpose, Inch
- When using carbon steel, forgings to be in accordance with ASTM A105.
- Flanges are tapped with American National Standard taper pipe threads.
- Bolt circle diameters are 1/8 inch larger than bolt diameter.
Flange - Threaded, ANSI Class 150, B16.5 RTJ (in) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size
(NPS) | Outside Diameter of Flange
A | Thickness of Flange
C | Diameter of Bore
E | Diameter of Hub at Base
J | Length of Hub
L | 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 | - | - | - | - | - | - | - | - | - | - | - | - |
| 3/4 | - | - | - | - | - | - | - | - | - | - | - | - |
| 1 | 4 1/4 | 1/2 | 1 15/16 | 11/16 | 11/16 | 2 1/2 | 1 7/8 | 11/32 | 1/4 | 4 | 5/8 | 3 1/8 |
| 1 1/4 | 4 5/8 | 9/16 | 2 5/16 | 13/16 | 13/16 | 2 7/8 | 2 1/4 | 11/32 | 1/4 | 4 | 5/8 | 3 1/2 |
| 1 1/2 | 5 | 5/8 | 2 9/16 | 7/8 | 7/8 | 3 1/4 | 2 9/16 | 11/32 | 1/4 | 4 | 5/8 | 3 7/8 |
| 2 | 6 | 11/16 | 3 1/16 | 1 | 1 | 4 | 3 1/4 | 11/32 | 1/4 | 4 | 3/4 | 4 3/4 |
| 2 1/2 | 7 | 13/16 | 3 9/16 | 1 1/8 | 1 1/8 | 4 3/4 | 4 | 11/32 | 1/4 | 4 | 3/4 | 5 1/2 |
| 3 | 7 1/2 | 7/8 | 4 1/4 | 1 3/16 | 1 3/16 | 5 1/4 | 4 1/2 | 11/32 | 1/4 | 4 | 3/4 | 6 |
| 3 1/2 | 8 1/2 | 7/8 | 4 13/16 | 1 1/4 | 1 1/4 | 6 1/16 | 5 3/16 | 11/32 | 1/4 | 8 | 3/4 | 7 |
| 4 | 9 | 7/8 | 5 5/16 | 1 5/16 | 1 5/16 | 6 3/4 | 5 7/8 | 11/32 | 1/4 | 8 | 3/4 | 7 1/2 |
| 5 | 10 | 7/8 | 6 7/16 | 1 7/16 | 1 7/16 | 7 5/8 | 6 3/4 | 11/32 | 1/4 | 8 | 7/8 | 8 1/2 |
| 6 | 11 | 15/16 | 7 9/16 | 1 9/16 | 1 9/16 | 8 5/8 | 7 5/8 | 11/32 | 1/4 | 8 | 7/8 | 9 1/2 |
| 8 | 13 1/2 | 1 1/16 | 9 11/16 | 1 3/4 | 1 3/4 | 10 3/4 | 9 3/4 | 11/32 | 1/4 | 8 | 7/8 | 11 3/4 |
| 10 | 16 | 1 1/8 | 12 | 1 15/16 | 1 15/16 | 13 | 12 | 11/32 | 1/4 | 12 | 1 | 14 1/4 |
| 12 | 19 | 1 3/16 | 14 3/8 | 2 3/16 | 2 3/16 | 16 | 15 | 11/32 | 1/4 | 12 | 1 | 17 |
| 14 | 21 | 1 5/16 | 15 3/4 | 2 1/4 | 2 1/4 | 16 3/4 | 15 5/8 | 11/32 | 1/4 | 12 | 1 1/8 | 18 3/4 |
| 16 | 23 1/2 | 1 3/8 | 18 | 2 1/2 | 2 1/2 | 19 | 17 7/8 | 11/32 | 1/4 | 16 | 1 1/8 | 21 1/4 |
| 18 | 25 | 1 1/2 | 19 7/8 | 2 11/16 | 2 11/16 | 21 1/2 | 20 3/8 | 11/32 | 1/4 | 16 | 1 1/4 | 22 3/4 |
| 20 | 27 1/2 | 1 5/8 | 22 | 2 7/8 | 2 7/8 | 23 1/2 | 22 | 11/32 | 1/4 | 20 | 1 1/4 | 25 |
| 22 | 29 1/2 | 1 3/4 | 24 | 3 1/8 | 3 1/8 | 25 1/2 | 24 1/4 | 11/32 | 1/4 | 20 | 1 3/8 | 27 1/4 |
| 24 | 32 | 1 13/16 | 26 1/8 | 3 1/4 | 3 1/4 | 28 | 26 1/2 | 11/32 | 1/4 | 20 | 1 3/8 | 29 1/2 |
