Flanges / Class 1500
Weld Neck Forged Flange
Threaded Forged Flange
Lap Joint Forged Flange
Socket Weld Forged Flange
Blind Forged Flange
Slip On Forged Flange
| Nom. Pipe Size | O | T | R | X | #/Dia of Holesa | Bolt Circle Dia | B | B2b | B3 | H | L | L2 | L3c | r | C | D | Thr |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ½ | 4.75 | 0.88 | 1.38 | 1.5 | 4-0.88 | 3.25 | 0.88 |
|
0.9 | 0.84 | 1.25 | 2.38 | 1.25 | 0.12 | 0.93 | 0.38 | 0.88 |
| ¾ | 5.12 | 1 | 1.69 | 1.75 | 4-0.88 | 3.5 | 1.09 | 1.11 | 1.05 | 1.38 | 2.75 | 1.38 | 0.12 | 1.14 | 0.44 | 1 | |
| 1 | 5.88 | 1.12 | 2 | 2.06 | 4-1.00 | 4 | 1.36 | 1.38 | 1.32 | 1.62 | 2.88 | 1.62 | 0.12 | 1.41 | 0.5 | 1.12 | |
| 1¼ | 6.25 | 1.12 | 2.5 | 2.5 | 4-1.00 | 4.38 | 1.7 | 1.72 | 1.66 | 1.62 | 2.88 | 1.62 | 0.19 | 1.75 | 0.56 | 1.19 | |
| 1½ | 7 | 1.25 | 2.88 | 2.75 | 4-1.12 | 4.88 | 1.95 | 1.97 | 1.9 | 1.75 | 3.25 | 1.75 | 0.25 | 1.99 | 0.62 | 1.25 | |
| 2 | 8.5 | 1.5 | 3.63 | 4.12 | 8-1.00 | 6.5 | 2.44 | 2.46 | 2.38 | 2.25 | 4 | 2.25 | 0.31 | 2.5 | 0.69 | 1.5 | |
| 2½ | 9.62 | 1.62 | 4.13 | 4.88 | 8-1.12 | 7.5 | 2.94 | 2.97 | 2.88 | 2.5 | 4.12 | 2.5 | 0.31 | 3 | 0.75 | 1.88 | |
| 3 | 10.5 | 1.88 | 5 | 5.25 | 8-1.25 | 8 | …. | 3.6 | 3.5 | …. | 4.62 | 2.88 | 0.38 | …. | …. | …. | |
| 4 | 12.25 | 2.12 | 6.19 | 6.38 | 8-1.38 | 9.5 | …. | 4.6 | 4.5 | …. | 4.88 | 3.56 | 0.44 | …. | …. | …. | |
| 5 | 14.75 | 2.88 | 7.31 | 7.75 | 8-1.63 | 11.5 | …. | 5.69 | 5.56 | …. | 6.12 | 4.12 | 0.44 | …. | …. | …. | |
| 6 | 15.5 | 3.25 | 8.5 | 9 | 12-1.50 | 12.5 | …. | 6.75 | 6.63 | …. | 6.75 | 4.69 | 0.5 | …. | …. | …. | |
| 8 | 19 | 3.62 | 10.63 | 11.5 | 12-1.75 | 15.5 | …. | 8.75 | 8.63 | …. | 8.38 | 5.62 | 0.5 | …. | …. | …. | |
| 10 | 23 | 4.25 | 12.75 | 14.5 | 12-2.00 | 19 | …. | 10.92 | 10.75 | …. | 10 | 7 | 0.5 | …. | …. | …. | |
| 12 | 26.5 | 4.88 | 15 | 17.75 | 16-2.12 | 22.5 | …. | 12.92 | 12.75 | …. | 11.12 | 8.62 | 0.5 | …. | …. | …. | |
| 14 | 29.5 | 5.25 | 16.25 | 19.5 | 16-2.38 | 25 | …. | 14.18 | 14 | …. | 11.75 | 9.5 | 0.5 | …. | …. | …. | |
| 16 | 32.5 | 5.75 | 18.5 | 21.75 | 16-2.63 | 27.75 | …. | 16.19 | 16 | …. | 12.25 | 10.25 | 0.5 | …. | …. | …. | |
| 18 | 36 | 6.38 | 21 | 23.5 | 16-2.88 | 30.5 | …. | 18.2 | 18 | …. | 12.88 | 10.88 | 0.5 | …. | …. | …. | |
| 20 | 38.75 | 7 | 23 | 25.25 | 16-3.12 | 32.75 | …. | 20.25 | 20 | …. | 14 | 11.5 | 0.5 | …. | …. | …. | |
| 24 | 46 | 8 | 27.25 | 30 | 16-3.63 | 39 | …. | 24.25 | 24 | …. | 16 | 13 | 0.5 | …. | …. | …. |
Dimensions are in inches.
((a)- Bolt hole diameter 1/8 in. larger than bolt diameter.
(b)- Standard bore dimensions provided. See bore chart for other wall thicknesses.
(c)- This dimension is commonly associated with "true" lap joints. Industry standard is to make to the slip on length through the hub.
Class 1500 Forged Flange PDF (for printing).