Texas FLANGE Sales Office 800-826-3801 |
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| Weld Neck Forged Flange | Threaded Forged Flange |
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| Lap Joint Forged Flange | Socket Weld Forged Flange |
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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 | 1.50 | 4-0.88 | 3.25 | 0.88 |  |
0.90 | 0.84 | 1.25 | 2.38 | 1.25 | 0.12 | 0.93 | 0.38 | 0.88 |
| ¾ | 5.12 | 1.00 | 1.69 | 1.75 | 4-0.88 | 3.50 | 1.09 | 1.11 | 1.05 | 1.38 | 2.75 | 1.38 | 0.12 | 1.14 | 0.44 | 1.00 | |
| 1 | 5.88 | 1.12 | 2.00 | 2.06 | 4-1.00 | 4.00 | 1.36 | 1.38 | 1.32 | 1.62 | 2.88 | 1.62 | 0.12 | 1.41 | 0.50 | 1.12 | |
| 1¼ | 6.25 | 1.12 | 2.50 | 2.50 | 4-1.00 | 4.38 | 1.70 | 1.72 | 1.66 | 1.62 | 2.88 | 1.62 | 0.19 | 1.75 | 0.56 | 1.19 | |
| 1½ | 7.00 | 1.25 | 2.88 | 2.75 | 4-1.12 | 4.88 | 1.95 | 1.97 | 1.90 | 1.75 | 3.25 | 1.75 | 0.25 | 1.99 | 0.62 | 1.25 | |
| 2 | 8.50 | 1.50 | 3.63 | 4.12 | 8-1.00 | 6.50 | 2.44 | 2.46 | 2.38 | 2.25 | 4.00 | 2.25 | 0.31 | 2.50 | 0.69 | 1.50 | |
| 2½ | 9.62 | 1.62 | 4.13 | 4.88 | 8-1.12 | 7.50 | 2.94 | 2.97 | 2.88 | 2.50 | 4.12 | 2.50 | 0.31 | 3.00 | 0.75 | 1.88 | |
| 3 | 10.50 | 1.88 | 5.00 | 5.25 | 8-1.25 | 8.00 | …. | 3.60 | 3.50 | …. | 4.62 | 2.88 | 0.38 | …. | …. | …. | |
| 4 | 12.25 | 2.12 | 6.19 | 6.38 | 8-1.38 | 9.50 | …. | 4.60 | 4.50 | …. | 4.88 | 3.56 | 0.44 | …. | …. | …. | |
| 5 | 14.75 | 2.88 | 7.31 | 7.75 | 8-1.63 | 11.50 | …. | 5.69 | 5.56 | …. | 6.12 | 4.12 | 0.44 | …. | …. | …. | |
| 6 | 15.50 | 3.25 | 8.50 | 9.00 | 12-1.50 | 12.50 | …. | 6.75 | 6.63 | …. | 6.75 | 4.69 | 0.50 | …. | …. | …. | |
| 8 | 19.00 | 3.62 | 10.63 | 11.50 | 12-1.75 | 15.50 | …. | 8.75 | 8.63 | …. | 8.38 | 5.62 | 0.50 | …. | …. | …. | |
| 10 | 23.00 | 4.25 | 12.75 | 14.50 | 12-2.00 | 19.00 | …. | 10.92 | 10.75 | …. | 10.00 | 7.00 | 0.50 | …. | …. | …. | |
| 12 | 26.50 | 4.88 | 15.00 | 17.75 | 16-2.12 | 22.50 | …. | 12.92 | 12.75 | …. | 11.12 | 8.62 | 0.50 | …. | …. | …. | |
| 14 | 29.50 | 5.25 | 16.25 | 19.50 | 16-2.38 | 25.00 | …. | 14.18 | 14.00 | …. | 11.75 | 9.50 | 0.50 | …. | …. | …. | |
| 16 | 32.50 | 5.75 | 18.50 | 21.75 | 16-2.63 | 27.75 | …. | 16.19 | 16.00 | …. | 12.25 | 10.25 | 0.50 | …. | …. | …. | |
| 18 | 36.00 | 6.38 | 21.00 | 23.50 | 16-2.88 | 30.50 | …. | 18.20 | 18.00 | …. | 12.88 | 10.88 | 0.50 | …. | …. | …. | |
| 20 | 38.75 | 7.00 | 23.00 | 25.25 | 16-3.12 | 32.75 | …. | 20.25 | 20.00 | …. | 14.00 | 11.50 | 0.50 | …. | …. | …. | |
| 24 | 46.00 | 8.00 | 27.25 | 30.00 | 16-3.63 | 39.00 | …. | 24.25 | 24.00 | …. | 16.00 | 13.00 | 0.50 | …. | …. | …. | |
| Dimensions are in inches. | |||||||||||||||||
| (a)- Bolt hole diameter 1/8 in. larger than bolt diameter. | |||||||||||||||||
| (b)- See bore chart for 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. | |||||||||||||||||
ANSI B16.5 Class 1500 Forged Flange PDF (for printing).