Table of Content
Flanges Size
Features
Pressure
Thickness
Finishing
Flange Threads type
Surface Coating
Applications
Disadvantages
Testing Methods
Production process
Connections
Packaging Methods
Type
Certification
Flanges Supplier in India provides a wide range of the most common types
We have established Supplies in Various Countries Like Qatar, Dubai, Oman, Lebanon, Turkey, Malaysia, Belgium, Germany, Netherlands etc
Slip On Flange
Socket Weld Flange
Threaded Flange
Lap Joint Flange
Forged Flange
Plate Flange
Blind Flange
Weld Neck Flange
| Class 150 Forged Flange Dimension | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nom. Pipe Size | O | T | TJ | R | X | #/Dia of Holesa | Bolt Circle Dia | B | B2b | B3 | H | L | L2 | L3c | r | D | Thr |
| ½ | 3.50 | 0.38 | 0.44 | 1.38 | 1.19 | 4-0.62 | 2.38 | 0.88 | 0.62 | 0.90 | 0.84 | 0.56 | 1.81 | 0.62 | 0.12 | 0.38 | 0.62 |
| ¾ | 3.88 | 0.44 | 0.50 | 1.69 | 1.50 | 4-0.62 | 2.75 | 1.09 | 0.82 | 1.11 | 1.05 | 0.56 | 2.00 | 0.62 | 0.12 | 0.44 | 0.62 |
| 1 | 4.25 | 0.50 | 0.56 | 2.00 | 1.94 | 4-0.62 | 3.12 | 1.36 | 1.05 | 1.38 | 1.32 | 0.62 | 2.12 | 0.69 | 0.12 | 0.50 | 0.69 |
| 1¼ | 4.62 | 0.56 | 0.62 | 2.50 | 2.31 | 4-0.62 | 3.50 | 1.70 | 1.38 | 1.72 | 1.66 | 0.75 | 2.19 | 0.81 | 0.19 | 0.56 | 0.81 |
| 1½ | 5.00 | 0.62 | 0.69 | 2.88 | 2.56 | 4-0.62 | 3.88 | 1.95 | 1.61 | 1.97 | 1.90 | 0.81 | 2.38 | 0.88 | 0.25 | 0.62 | 0.88 |
| 2 | 6.00 | 0.69 | 0.75 | 3.62 | 3.06 | 4-0.75 | 4.75 | 2.44 | 2.07 | 2.46 | 2.38 | 0.94 | 2.44 | 1.00 | 0.31 | 0.69 | 1.00 |
| 2½ | 7.00 | 0.81 | 0.88 | 4.12 | 3.56 | 4-0.75 | 5.50 | 2.94 | 2.47 | 2.97 | 2.88 | 1.06 | 2.69 | 1.12 | 0.31 | 0.75 | 1.12 |
| 3 | 7.50 | 0.88 | 0.94 | 5.00 | 4.25 | 4-0.75 | 6.00 | 3.57 | 3.07 | 3.60 | 3.50 | 1.12 | 2.69 | 1.19 | 0.38 | 0.81 | 1.19 |
| 3½ | 8.50 | 0.88 | 0.94 | 5.50 | 4.81 | 8-0.75 | 7.00 | 4.07 | 3.55 | 4.10 | 4.00 | 1.19 | 2.75 | 1.25 | 0.38 | 0.88 | 1.25 |
| 4 | 9.00 | 0.88 | 0.94 | 6.19 | 5.31 | 8-0.75 | 7.50 | 4.57 | 4.03 | 4.60 | 4.50 | 1.25 | 2.94 | 1.31 | 0.44 | 0.94 | 1.31 |
| 5 | 10.00 | 0.88 | 0.94 | 7.31 | 6.44 | 8-0.88 | 8.50 | 5.66 | 5.05 | 5.69 | 5.56 | 1.38 | 3.44 | 1.44 | 0.44 | 0.94 | 1.44 |
| 6 | 11.00 | 0.94 | 1.00 | 8.50 | 7.56 | 8-0.88 | 9.50 | 6.72 | 6.07 | 6.75 | 6.63 | 1.50 | 3.44 | 1.56 | 0.50 | 1.06 | 1.56 |
| 8 | 13.50 | 1.06 | 1.12 | 10.62 | 9.69 | 8-0.88 | 11.75 | 8.72 | 7.98 | 8.75 | 8.63 | 1.69 | 3.94 | 1.75 | 0.50 | 1.25 | 1.75 |
| 10 | 16.00 | 1.12 | 1.19 | 12.75 | 12.00 | 12-1.00 | 14.25 | 10.88 | 10.02 | 10.92 | 10.75 | 1.88 | 3.94 | 1.94 | 0.50 | 1.31 | 1.94 |
| 12 | 19.00 | 1.19 | 1.25 | 15.00 | 14.38 | 12-1.00 | 17.00 | 12.88 | 12.00 | 12.92 | 12.75 | 2.12 | 4.44 | 2.19 | 0.50 | 1.56 | 2.19 |
| 14 | 21.00 | 1.31 | 1.38 | 16.25 | 15.75 | 12-1.12 | 18.75 | 14.14 | 13.25 | 14.18 | 14.00 | 2.19 | 4.94 | 3.12 | 0.50 | 1.63 | 2.25 |
| 16 | 23.50 | 1.38 | 1.44 | 18.50 | 18.00 | 16-1.12 | 21.25 | 16.16 | 15.25 | 16.19 | 16.00 | 2.44 | 4.94 | 3.44 | 0.50 | 1.75 | 2.50 |
| 18 | 25.00 | 1.50 | 1.56 | 21.00 | 19.88 | 16-1.25 | 22.75 | 18.18 | 17.25 | 18.20 | 18.00 | 2.62 | 5.44 | 3.81 | 0.50 | 1.94 | 2.69 |
| 20 | 27.50 | 1.62 | 1.69 | 23.00 | 22.00 | 20-1.25 | 25.00 | 20.20 | 19.25 | 20.25 | 20.00 | 2.81 | 5.62 | 4.06 | 0.50 | 2.13 | 2.88 |
| 22 | 29.50 | 1.75 | 1.81 | 25.25 | 24.25 | 20-1.38 | 27.25 | 22.22 | 21.25 | 22.25 | 22.00 | 3.07 | 5.82 | 4.25 | 0.50 | 2.38 | 3.13 |
| 24 | 32.00 | 1.81 | 1.88 | 27.25 | 26.12 | 20-1.38 | 29.50 | 24.25 | 23.25 | 24.25 | 24.00 | 3.19 | 5.94 | 4.38 | 0.50 | 2.50 | 3.25 |
| Nom. Pipe Size | O | T | TJ | R | X | #/Dia of Holesa | Bolt Circle Dia | B | B2b | B3 | H | L | L2 | L3c | R | C | D | Thr |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ½ | 3.75 | 0.50 | 0.56 | 1.38 | 1.50 | 4-0.63 | 2.62 | 0.88 | 0.62 | 0.90 | 0.84 | 0.81 | 2.00 | 0.88 | 0.12 | 0.93 | 0.38 | 0.62 |
| ¾ | 4.62 | 0.56 | 0.62 | 1.69 | 1.88 | 4-0.75 | 3.25 | 1.09 | 0.82 | 1.11 | 1.05 | 0.94 | 2.19 | 1.00 | 0.12 | 1.14 | 0.44 | 0.62 |
| 1 | 4.88 | 0.62 | 0.69 | 2.00 | 2.12 | 4-0.75 | 3.50 | 1.36 | 1.05 | 1.38 | 1.32 | 1.00 | 2.38 | 1.06 | 0.12 | 1.41 | 0.50 | 0.69 |
| 1¼ | 5.25 | 0.69 | 0.75 | 2.50 | 2.50 | 4-0.75 | 3.88 | 1.70 | 1.38 | 1.72 | 1.66 | 1.00 | 2.50 | 1.06 | 0.19 | 1.75 | 0.56 | 0.81 |
| 1½ | 6.12 | 0.75 | 0.81 | 2.88 | 2.75 | 4-0.88 | 4.50 | 1.95 | 1.61 | 1.97 | 1.90 | 1.13 | 2.63 | 1.19 | 0.25 | 1.98 | 0.62 | 0.88 |
| 2 | 6.50 | 0.81 | 0.88 | 3.62 | 3.31 | 8-0.75 | 5.00 | 2.44 | 2.07 | 2.46 | 2.38 | 1.25 | 2.69 | 1.31 | 0.31 | 2.50 | 0.69 | 1.12 |
| 2½ | 7.50 | 0.94 | 1.00 | 4.12 | 3.94 | 8-0.88 | 5.88 | 2.94 | 2.47 | 2.97 | 2.88 | 1.44 | 2.94 | 1.50 | 0.31 | 3.00 | 0.75 | 1.25 |
| 3 | 8.25 | 1.06 | 1.12 | 5.00 | 4.62 | 8-0.88 | 6.62 | 3.57 | 3.07 | 3.60 | 3.50 | 1.63 | 3.06 | 1.69 | 0.38 | 3.63 | 0.81 | 1.25 |
| 3½ | 9.00 | 1.12 | 1.19 | 5.50 | 5.25 | 8-0.88 | 7.25 | 4.07 | 3.55 | 4.10 | 4.00 | 1.69 | 3.13 | 1.75 | 0.38 | 4.13 | 1.44 | |
| 4 | 10.00 | 1.19 | 1.25 | 6.19 | 5.75 | 8-0.88 | 7.88 | 4.57 | 4.03 | 4.60 | 4.50 | 1.82 | 3.32 | 1.88 | 0.44 | 4.63 | 1.44 | |
| 5 | 11.00 | 1.31 | 1.38 | 7.31 | 7.00 | 8-0.88 | 9.25 | 5.66 | 5.05 | 5.69 | 5.56 | 1.94 | 3.82 | 2.00 | 0.44 | 5.69 | 1.69 | |
| 6 | 12.50 | 1.38 | 1.44 | 8.50 | 8.12 | 12-0.88 | 10.62 | 6.72 | 6.07 | 6.75 | 6.63 | 2.00 | 3.82 | 2.06 | 0.50 | 6.75 | 1.81 | |
| 8 | 15.00 | 1.56 | 1.62 | 10.62 | 10.25 | 12-1.00 | 13.00 | 8.72 | 7.98 | 8.75 | 8.63 | 2.38 | 4.32 | 2.44 | 0.50 | 8.75 | 2.00 | |
| 10 | 17.50 | 1.81 | 1.88 | 12.75 | 12.62 | 16-1.12 | 15.25 | 10.88 | 10.02 | 10.92 | 10.75 | 2.56 | 4.56 | 3.75 | 0.50 | 10.88 | 2.19 | |
| 12 | 20.50 | 1.94 | 2.00 | 15.00 | 14.75 | 16-1.25 | 17.75 | 12.88 | 12.00 | 12.92 | 12.75 | 2.82 | 5.06 | 4.00 | 0.50 | 12.94 | 2.38 | |
| 14 | 23.00 | 2.06 | 2.12 | 16.25 | 16.75 | 20-1.25 | 20.25 | 14.14 | 13.25 | 14.18 | 14.00 | 2.94 | 5.56 | 4.38 | 0.50 | 14.19 | 2.50 | |
| 16 | 25.50 | 2.19 | 2.25 | 18.50 | 19.00 | 20-1.38 | 22.50 | 16.16 | 15.25 | 16.19 | 16.00 | 3.19 | 5.69 | 4.75 | 0.50 | 16.19 | 2.69 | |
| 18 | 28.00 | 2.31 | 2.38 | 21.00 | 21.00 | 24-1.38 | 24.75 | 18.18 | 17.25 | 18.20 | 18.00 | 3.44 | 6.19 | 5.12 | 0.50 | 18.19 | 2.75 | |
| 20 | 30.50 | 2.44 | 2.50 | 23.00 | 23.12 | 24-1.38 | 27.00 | 20.20 | 19.25 | 20.25 | 20.00 | 3.69 | 6.32 | 5.50 | 0.50 | 20.19 | 2.88 | |
| 22 | 33.00 | 2.57 | 2.63 | 25.25 | 25.25 | 24-1.63 | 29.25 | 22.22 | 21.25 | 22.25 | 22.00 | 3.93 | 6.43 | 5.75 | 0.50 | 22.19 | 3.13 | |
| 24 | 36.00 | 2.69 | 2.75 | 27.25 | 27.62 | 24-1.63 | 32.00 | 24.25 | 23.25 | 24.25 | 24.00 | 4.13 | 6.56 | 6.00 | 0.50 | 24.19 | 3.25 |
| Nom. Pipe Size | O | T | R | X | #/Dia of Holesa | Bolt Circle Dia | B | B3 | H | L | L2 | L3c | r | C | D | Thr |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ½ | 3.75 | 0.56 | 1.38 | 1.5 | 4-0.63 | 2.62 | 0.88 | 0.9 | 0.84 | 0.88 | 2.06 | 0.88 | 0.12 | 0.93 | 0.38 | 0.62 |
| ¾ | 4.62 | 0.62 | 1.69 | 1.88 | 4-0.75 | 3.25 | 1.09 | 1.11 | 1.05 | 1 | 2.25 | 1 | 0.12 | 1.14 | 0.44 | 0.62 |
| 1 | 4.88 | 0.69 | 2 | 2.12 | 4-0.75 | 3.5 | 1.36 | 1.38 | 1.32 | 1.06 | 2.44 | 1.06 | 0.12 | 1.41 | 0.5 | 0.69 |
| 1¼ | 5.25 | 0.81 | 2.5 | 2.5 | 4-0.75 | 3.88 | 1.7 | 1.72 | 1.66 | 1.12 | 2.62 | 1.12 | 0.19 | 1.75 | 0.56 | 0.81 |
| 1½ | 6.12 | 0.88 | 2.88 | 2.75 | 4-0.88 | 4.5 | 1.95 | 1.97 | 1.9 | 1.25 | 2.75 | 1.25 | 0.25 | 1.99 | 0.62 | 0.88 |
| 2 | 6.5 | 1 | 3.62 | 3.31 | 8-0.75 | 5 | 2.44 | 2.46 | 2.38 | 1.44 | 2.88 | 1.44 | 0.31 | 2.5 | 0.69 | 1.12 |
| 2½ | 7.5 | 1.12 | 4.12 | 3.94 | 8-0.88 | 5.88 | 2.94 | 2.97 | 2.88 | 1.62 | 3.12 | 1.62 | 0.31 | 3 | 0.75 | 1.25 |
| 3 | 8.25 | 1.25 | 5 | 4.62 | 8-0.88 | 6.62 | 3.57 | 3.6 | 3.5 | 1.81 | 3.25 | 1.81 | 0.38 | 3.63 | 0.81 | 1.38 |
| 3½ | 9 | 1.38 | 5.5 | 5.25 | 8-1.00 | 7.25 | 4.07 | 4.1 | 4 | 1.94 | 3.38 | 1.94 | 0.38 | 4.13 | 1.56 | |
| 4 | 10.75 | 1.5 | 6.19 | 6 | 8-1.00 | 8.5 | 4.57 | 4.6 | 4.5 | 2.12 | 4 | 2.12 | 0.44 | 4.63 | 1.62 | |
| 5 | 13 | 1.75 | 7.31 | 7.44 | 8-1.12 | 10.5 | 5.66 | 5.69 | 5.56 | 2.38 | 4.5 | 2.38 | 0.44 | 5.69 | 1.88 | |
| 6 | 14 | 1.88 | 8.5 | 8.75 | 12-1.12 | 11.5 | 6.72 | 6.75 | 6.63 | 2.62 | 4.62 | 2.62 | 0.5 | 6.75 | 2 | |
| 8 | 16.5 | 2.19 | 10.62 | 10.75 | 12-1.25 | 13.75 | 8.72 | 8.75 | 8.63 | 3 | 5.25 | 3 | 0.5 | 8.75 | 2.25 | |
| 10 | 20 | 2.5 | 12.75 | 13.5 | 16-1.38 | 17 | 10.88 | 10.92 | 10.75 | 3.38 | 6 | 4.38 | 0.5 | 10.88 | 2.56 | |
| 12 | 22 | 2.62 | 15 | 15.75 | 20-1.38 | 19.25 | 12.88 | 12.92 | 12.75 | 3.62 | 6.12 | 4.62 | 0.5 | 12.94 | 2.75 | |
| 14 | 23.75 | 2.75 | 16.25 | 17 | 20-1.50 | 20.75 | 14.14 | 14.18 | 14 | 3.69 | 6.5 | 5 | 0.5 | 14.19 | 2.88 | |
| 16 | 27 | 3 | 18.5 | 19.5 | 20-1.63 | 23.75 | 16.16 | 16.19 | 16 | 4.19 | 7 | 5.5 | 0.5 | 16.19 | 3.06 | |
| 18 | 29.25 | 3.25 | 21 | 21.5 | 20-1.75 | 25.75 | 18.18 | 18.2 | 18 | 4.62 | 7.25 | 6 | 0.5 | 18.19 | 3.12 | |
| 20 | 32 | 3.5 | 23 | 24 | 24-1.75 | 28.5 | 20.2 | 20.25 | 20 | 5 | 7.5 | 6.5 | 0.5 | 20.19 | 3.25 | |
| 22 | 34.25 | 3.75 | 25.25 | 26.25 | 24-1.75 | 30.63 | 22.22 | 22.25 | 22 | 5.25 | 7.75 | 6.88 | 0.5 | -- | ||
| 24 | 37 | 4 | 27.25 | 28.25 | 24-2.00 | 33 | 24.25 | 24.25 | 24 | 5.5 | 8 | 7.25 | 0.5 | 24.19 | 3.62 |
| Nom. Pipe Size | O | T | R | X | #/Dia of Holesa | Bolt Circle Dia | B | B3 | H | L | L2 | L3c | r | C | Thr |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sizes 1/2" through 2 1/2" are identical to class 1500. | |||||||||||||||
| 3 | 9.5 | 1.5 | 5 | 5 | 8-1.00 | 7.5 | 3.57 | 3.6 | 3.5 | 2.12 | 4 | 2.12 | 0.38 | 3.63 | 1.62 |
| 4 | 11.5 | 1.75 | 6.19 | 6.25 | 8-1.25 | 9.25 | 4.57 | 4.6 | 4.5 | 2.75 | 4.5 | 2.75 | 0.44 | 4.63 | 1.88 |
| 5 | 13.75 | 2 | 7.31 | 7.5 | 8-1.38 | 11 | 5.66 | 5.69 | 5.56 | 3.12 | 5 | 3.12 | 0.44 | 5.69 | 2.12 |
| 6 | 15 | 2.19 | 8.5 | 9.25 | 12-1.25 | 12.5 | 6.72 | 6.75 | 6.63 | 3.38 | 5.5 | 3.38 | 0.5 | 6.75 | 2.25 |
| 8 | 18.5 | 2.5 | 10.63 | 11.75 | 12-1.50 | 15.5 | 8.72 | 8.75 | 8.63 | 4 | 6.38 | 4.5 | 0.5 | 8.75 | 2.5 |
| 10 | 21.5 | 2.75 | 12.75 | 14.5 | 16-1.50 | 18.5 | 10.88 | 10.92 | 10.75 | 4.25 | 7.25 | 5 | 0.5 | 10.88 | 2.81 |
| 12 | 24 | 3.12 | 15 | 16.5 | 20-1.50 | 21 | 12.88 | 12.92 | 12.75 | 4.63 | 7.88 | 5.62 | 0.5 | 12.94 | 3 |
| 14 | 25.25 | 3.38 | 16.25 | 17.75 | 20-1.63 | 22 | 14.14 | 14.18 | 14 | 5.12 | 8.38 | 6.12 | 0.5 | 14.19 | 3.25 |
| 16 | 27.75 | 3.5 | 18.5 | 20 | 20-1.75 | 24.25 | 16.16 | 16.19 | 16 | 5.25 | 8.5 | 6.5 | 0.5 | 16.19 | 3.38 |
| 18 | 31 | 4 | 21 | 22.25 | 20-2.00 | 27 | 18.18 | 18.2 | 18 | 6 | 9 | 7.5 | 0.5 | 18.19 | 3.5 |
| 20 | 33.75 | 4.25 | 23 | 24.5 | 20-2.13 | 29.5 | 20.2 | 20.25 | 20 | 6.25 | 9.75 | 8.25 | 0.5 | 20.19 | 3.62 |
| 24 | 41 | 5.5 | 27.25 | 29.5 | 20-2.63 | 35.5 | 24.25 | 24.25 | 24 | 8 | 11.5 | 10.5 | 0.5 | 24.19 | 4 |
| Nom. Pipe Size | O | T | R | X | #/Dia of Holesa | Bolt Circle Dia | B | 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 |
| Nom. Pipe Size | O | T | R | X | #/Dia of Holesa | Bolt Circle Dia | B3 | H | L | L2 | L3 | r | C | Thr |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ½ | 5.25 | 1.19 | 1.38 | 1.69 | 4-0.88 | 3.5 | 0.9 | 0.84 | 1.56 | 2.88 | 1.56 | 0.12 | 0.93 | 1.12 |
| ¾ | 5.5 | 1.25 | 1.69 | 2 | 4-0.88 | 3.75 | 1.11 | 1.05 | 1.69 | 3.12 | 1.69 | 0.12 | 1.14 | 1.25 |
| 1 | 6.25 | 1.38 | 2 | 2.25 | 4-1.00 | 4.25 | 1.38 | 1.32 | 1.88 | 3.5 | 1.88 | 0.12 | 1.41 | 1.38 |
| 1¼ | 7.25 | 1.5 | 2.5 | 2.88 | 4-1.12 | 5.13 | 1.72 | 1.66 | 2.06 | 3.75 | 2.06 | 0.19 | 1.75 | 1.5 |
| 1½ | 8 | 1.75 | 2.88 | 3.12 | 4-1.25 | 5.75 | 1.97 | 1.9 | 2.38 | 4.38 | 2.38 | 0.25 | 1.99 | 1.75 |
| 2 | 9.25 | 2 | 3.63 | 3.75 | 8-1.12 | 6.75 | 2.46 | 2.38 | 2.75 | 5 | 2.75 | 0.31 | 2.5 | 2 |
| 2½ | 10.5 | 2.25 | 4.13 | 4.5 | 8-1.25 | 7.75 | 2.97 | 2.88 | 3.12 | 5.62 | 3.12 | 0.31 | 3 | 2.25 |
| 3 | 12 | 2.62 | 5 | 5.25 | 8-1.38 | 9 | 3.6 | 3.5 | 6.62 | 3.62 | 0.38 | |||
| 4 | 14 | 3 | 6.19 | 6.5 | 8-1.63 | 10.75 | 4.6 | 4.5 | 7.5 | 4.25 | 0.44 | |||
| 5 | 16.5 | 3.62 | 7.31 | 8 | 8-1.88 | 12.75 | 5.69 | 5.56 | 9 | 5.12 | 0.44 | |||
| 6 | 19 | 4.25 | 8.5 | 9.25 | 8-2.12 | 14.5 | 6.75 | 6.63 | 10.75 | 6 | 0.5 | |||
| 8 | 21.75 | 5 | 10.63 | 12 | 12-2.12 | 17.25 | 8.75 | 8.63 | 12.5 | 7 | 0.5 | |||
| 10 | 26.5 | 6.5 | 12.75 | 14.75 | 12-2.63 | 21.25 | 10.92 | 10.75 | 16.5 | 9 | 0.5 | |||
| 12 | 30 | 7.25 | 15 | 17.38 | 12-2.88 | 24.38 | 12.92 | 12.75 | 18.25 | 10 | 0.5 |
| Flange pressure rating in psig for Forged Flange ASME |
|||||||
|---|---|---|---|---|---|---|---|
| Temperature (F°) | 150# | 300# | 400# | 600# | 900# | 1500# | 2500# |
| -20 to 100 | 285 | 740 | 985 | 1480 | 2220 | 3705 | 6170 |
| 200 | 260 | 680 | 905 | 1360 | 2035 | 3395 | 5655 |
| 300 | 230 | 655 | 870 | 1310 | 1965 | 3270 | 5450 |
| 400 | 200 | 635 | 845 | 1265 | 1900 | 3170 | 5280 |
| 500 | 170 | 605 | 805 | 1205 | 1810 | 3015 | 5025 |
| 600 | 140 | 570 | 755 | 1135 | 1705 | 2840 | 4730 |
| 650 | 125 | 550 | 730 | 1100 | 1650 | 2745 | 4575 |
| 700 | 110 | 530 | 710 | 1060 | 1590 | 2655 | 4425 |
| 750 | 95 | 505 | 675 | 1015 | 1520 | 2535 | 4230 |
| 800 | 80 | 410 | 550 | 825 | 1235 | 2055 | 3430 |
| 850 | 65 | 320 | 425 | 640 | 955 | 1595 | 2655 |
| 900 | 50 | 230 | 305 | 460 | 690 | 1150 | 1915 |
| 950 | 35 | 135 | 185 | 275 | 410 | 685 | 1145 |
| 1000 | 20 | 85 | 115 | 170 | 255 | 430 | 715 |
Flanges Manufacturer in India offers flanges with comparable equivalent grades
| Flange Type | International Standard |
|---|---|
| Piping Flanges (up to 24") | ASME/ANSI B16.5 |
| Large Diameter Flanges | ASME/ANSI B16.47 |
| Oil & Gas Industry Flanges | API 6A |
| Welded, Slip-on, Threaded Flanges | DIN Flanges (e.g., DIN 2573) |
| Flange Dimensions and Pressure Ratings | BS 4504 |
| General Flange Standards | ISO 7005 |
| Grade | Mn | Si | C | P | Cr | Mo | S |
|---|---|---|---|---|---|---|---|
| F1 | 0.3-0.6 | 0.5 | 0.15 max | 0.03 | 4-6 | 0.44-0.65 | 0.03 |
| F11 | 0.3-0.6 | 0.5-1.0 | 0.5-0.15 | 0.03 | 1.0-1.5 | 0.44-0.65 | 0.03 |
| F5 | 0.3-0.6 | 0.5-1.0 | 0.15 max | 0.03 | 4-6 | 0.44-0.65 | 0.03 |
| F9 | 0.3-0.6 | 0.5-1.0 | 0.15 max | 0.03 | 8-10 | 0.9-1.1 | 0.03 |
| F12 | 0.3-0.6 | 0.5 | 0.15 max | 0.03 | 4-6 | 0.44-0.65 | 0.03 |
| F22 | 0.3-0.6 | 0.5 | 0.50.15 max | 0.03 | 4-6 | 0.44-0.65 | 0.03 |
| F91 | 0.3-0.6 | 0.5-1.0 | 0.15 max | 0.03 | 8-10 | 0.9-1.1 | 0.03 |
| Property | Carbon Steel (ASTM A105) | Stainless Steel (ASTM A182 F304/F316) | Alloy Steel (ASTM A182 F11/F22) | Duplex Stainless Steel (ASTM A182 F51/F60) | Nickel Alloys (ASTM B564) |
|---|---|---|---|---|---|
| Hardness | 187 - 241 HB (Rockwell B) | 160 - 220 HB (Rockwell B) | 200 - 250 HB (Rockwell B) | 220 - 280 HB (Rockwell B) | 200 - 250 HB (Rockwell B) |
| Density | ~7.85 g/cm³ | ~8.00 g/cm³ | ~7.85 g/cm³ | ~7.80 g/cm³ | ~8.90 g/cm³ |
| Grade | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
|---|---|---|---|
| F9 | 585 | 380 | 20 % |
| F1 | 485 | 275 | 20 % |
| F5 | 485 | 275 | 20 % |
| F11 | 415 | 205 | 20 % |
| F22 | 415 | 205 | 20 % |
| F12 | 485 | 275 | 20 % |
| F91 | 585 | 380 | 20 % |
| Method | Description |
|---|---|
| Weld Neck | Welded at neck, strong connection. |
| Socket Weld | Pipe fits into socket. |
| Slip-On | Slips over pipe, welded on edges. |
| Threaded | Screwed onto pipe. |
| Lap Joint | Flange rotates. |
| Bolted | Bolts and gasket. |
| Clamp | Clamped for quick assembly. |
What is the Difference Between Forged and Cast Flanges?
| Aspect | Forged Flanges | Cast Flanges |
|---|---|---|
| Material Strength | Stronger | Weaker |
| Applications | High-pressure | Lower-pressure |
| Cost | More expensive | More affordable |
| Weight | Lighter | Heavier |
Materials
