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Engineering ToolBox > Steel Pipe Flanges for Waterworks Services
The standard ANSI/AWWA C207-01 Steel Pipe Flanges for Waterworks Services - covers slip-on flanges.
| Steel Pipe Flanges for Waterworks Services AWWA C207-94 Class B | ||||||
| Pipe Size (inches) | Outside Diameter (inches) | Inside Diameter (Slip on Bore) (inches) | Number of Bolt Holes | Bolt Hole Diameter (inches) | Bolt Circle (inches) | Thickness (inches) |
| 4 | 9 | 4.57 | 8 | 3/4 | 7-1/2 | 5/8 |
| 5 | 10 | 5.66 | 8 | 7/8 | 8-1/2 | 5/8 |
| 6 | 11 | 6.72 | 8 | 7/8 | 9-1/2 | 11/16 |
| 8 | 13-1/2 | 8.72 | 8 | 7/8 | 11-3/4 | 11/16 |
| 10 | 16 | 10.88 | 12 | 1 | 14-1/4 | 11/16 |
| 12 | 19 | 12.88 | 12 | 1 | 17 | 11/16 |
| 14 | 21 | 14.19 | 12 | 1-1/8 | 18-3/4 | 11/16 |
| 16 | 23-1/2 | 16.19 | 16 | 1-1/8 | 21-1/4 | 11/16 |
| 18 | 25 | 18.19 | 16 | 1-1/4 | 22-3/4 | 11/16 |
| 20 | 27-1/2 | 20.19 | 20 | 1-1/4 | 25 | 11/16 |
| 22 | 29-1/2 | 22.19 | 20 | 1-3/8 | 27-1/4 | 3/4 |
| 24 | 32 | 24.19 | 20 | 1-3/8 | 29-1/2 | 3/4 |
| 26 | 34-1/4 | - | 24 | 1-3/8 | 31-3/4 | 13/16 |
| 28 | 36-1/2 | - | 28 | 1-3/8 | 34 | 7/8 |
| 30 | 38-3/4 | - | 28 | 1-3/8 | 36 | 7/8 |
| 32 | 41-3/4 | - | 28 | 1-5/8 | 38-1/2 | 15/16 |
| 34 | 43-3/4 | - | 32 | 1-5/8 | 40-1/2 | 15/16 |
| 36 | 46 | - | 32 | 1-5/8 | 42-3/4 | 1 |
| 38 | 48-3/4 | - | 32 | 1-5/8 | 45-1/4 | 1 |
| 40 | 50-3/4 | - | 36 | 1-5/8 | 47-1/4 | 1 |
| 42 | 53 | - | 36 | 1-5/8 | 49-1/2 | 1-1/8 |
| 44 | 55-1/4 | - | 40 | 1-5/8 | 51-3/4 | 1-1/8 |
| 46 | 57-1/4 | - | 40 | 1-5/8 | 53-3/4 | 1-1/8 |
| 48 | 59-1/2 | - | 44 | 1-5/8 | 56 | 1-1/4 |
| 50 | 61-3/4 | - | 44 | 1-7/8 | 58-1/4 | 1-1/4 |
| 52 | 64 | - | 44 | 1-7/8 | 60-1/2 | 1-1/4 |
| 54 | 66-1/4 | - | 44 | 1-7/8 | 62-3/4 | 1-3/8 |
| 60 | 73 | - | 52 | 1-7/8 | 69-1/4 | 1-1/2 |
| 66 | 80 | - | 52 | 1-7/8 | 76 | 1-5/8 |
| 72 | 86-1/2 | - | 60 | 1-7/8 | 82-1/2 | 1-3/4 |
| 78 | 93 | - | 64 | 2-1/8 | 89 | 2 |
| 84 | 99-3/4 | - | 64 | 2-1/8 | 95-1/2 | 2 |
| 90 | 106-1/2 | - | 68 | 2-3/8 | 102 | 2-1/4 |
| 96 | 113-1/4 | - | 68 | 2-3/8 | 108-1/2 | 2-1/4 |
| 102 | 120 | - | 72 | 2-5/8 | 114-1/2 | 2-1/2 |
| 108 | 126-3/4 | - | 72 | 2-5/8 | 120-3/4 | 2-1/2 |
| 114 | 133-1/2 | - | 76 | 2-7/8 | 126-3/4 | 2-3/4 |
| 120 | 140-1/4 | - | 76 | 2-7/8 | 132-3/4 | 2-3/4 |
| 126 | 147 | - | 80 | 3-1/8 | 139-1/4 | 3 |
| 132 | 153-3/4 | - | 80 | 3-1/8 | 145-3/4 | 3 |
| 138 | 160-1/2 | - | 84 | 3-3/8 | 152 | 3-1/4 |
| 144 | 167-1/4 | - | 84 | 3-3/8 | 158-1/4 | 3-1/4 |
| Steel Pipe Flanges for Waterworks Services AWWA C207-94 Class D | ||||||
| Pipe Size (inches) | Outside Diameter (inches) | Inside Diameter (Slip on Bore) (inches) | Number of Bolt Holes | Bolt Hole Diameter (inches) | Bolt Circle (inches) | Thickness (inches) |
| 4 | 9 | 4.57 | 8 | 3/4 | 7-1/2 | 5/8 |
| 5 | 10 | 5.66 | 8 | 7/8 | 8-1/2 | 5/8 |
| 6 | 11 | 6.72 | 8 | 7/8 | 9-1/2 | 11/16 |
| 8 | 13-1/2 | 8.72 | 8 | 7/8 | 11-3/4 | 11/16 |
| 10 | 16 | 10.88 | 12 | 1 | 14-1/4 | 11/16 |
| 12 | 19 | 12.88 | 12 | 1 | 17 | 13/16 |
| 14 | 21 | 14.19 | 12 | 1-1/8 | 18-3/4 | 15/16 |
| 16 | 23-1/2 | 16.19 | 16 | 1-1/8 | 21-1/4 | 1 |
| 18 | 25 | 18.19 | 16 | 1-1/4 | 22-3/4 | 1-1/16 |
| 20 | 27-1/2 | 20.19 | 20 | 1-1/4 | 25 | 1-1/8 |
| 22 | 29-1/2 | 22.19 | 20 | 1-3/8 | 27-1/4 | 1-3/16 |
| 24 | 32 | 24.19 | 20 | 1-3/8 | 29-1/2 | 1-1/4 |
| 26 | 34-1/4 | - | 24 | 1-3/8 | 31-3/4 | 1-5/16 |
| 28 | 36-1/2 | - | 28 | 1-3/8 | 34 | 1-5/16 |
| 30 | 38-3/4 | - | 28 | 1-3/8 | 36 | 1-3/8 |
| 32 | 41-3/4 | - | 28 | 1-5/8 | 38-1/2 | 1-1/2 |
| 34 | 43-3/4 | - | 32 | 1-5/8 | 40-1/2 | 1-1/2 |
| 36 | 46 | - | 32 | 1-5/8 | 42-3/4 | 1-5/8 |
| 38 | 48-3/4 | - | 32 | 1-5/8 | 45-1/4 | 1-5/8 |
| 40 | 50-3/4 | - | 36 | 1-5/8 | 47-1/4 | 1-5/8 |
| 42 | 53 | - | 36 | 1-5/8 | 49-1/2 | 1-3/4 |
| 44 | 55-1/4 | - | 40 | 1-5/8 | 51-3/4 | 1-3/4 |
| 46 | 57-1/4 | - | 40 | 1-5/8 | 53-3/4 | 1-3/4 |
| 48 | 59-1/2 | - | 44 | 1-5/8 | 56 | 1-7/8 |
| 50 | 61-3/4 | - | 44 | 1-7/8 | 58-1/4 | 2 |
| 52 | 64 | - | 44 | 1-7/8 | 60-1/2 | 2 |
| 54 | 66-1/4 | - | 44 | 1-7/8 | 62-3/4 | 2-1/8 |
| 60 | 73 | - | 52 | 1-7/8 | 69-1/4 | 2-1/4 |
| 66 | 80 | - | 52 | 1-7/8 | 76 | 2-1/2 |
| 72 | 86-1/2 | - | 60 | 1-7/8 | 82-1/2 | 2-5/8 |
| 78 | 93 | - | 64 | 2-1/8 | 89 | 2-3/4 |
| 84 | 99-3/4 | - | 64 | 2-1/8 | 95-1/2 | 2-7/8 |
| 90 | 106-1/2 | - | 68 | 2-3/8 | 102 | 3 |
| 96 | 113-1/4 | - | 68 | 2-3/8 | 108-1/2 | 3-1/4 |
| 102 | 120 | - | 72 | 2-5/8 | 114-1/2 | 3-1/4 |
| 108 | 126-3/4 | - | 72 | 2-5/8 | 120-3/4 | 3-3/8 |
| 114 | 133-1/2 | - | 76 | 2-7/8 | 126-3/4 | 3-1/2 |
| 120 | 140-1/4 | - | 76 | 2-7/8 | 132-3/4 | 3-1/2 |
| 126 | 147 | - | 80 | 3-1/8 | 139-1/4 | 3-3/4 |
| 132 | 153-3/4 | - | 80 | 3-1/8 | 145-3/4 | 3-7/8 |
| 138 | 160-1/2 | - | 84 | 3-3/8 | 152 | 4 |
| 144 | 167-1/4 | - | 84 | 3-3/8 | 158-1/4 | 4-1/8 |
| Steel Pipe Flanges for Waterworks Services AWWA C207-94 Class E | ||||||
| Pipe Size (inches) | Outside Diameter (inches) | Inside Diameter (Slip on Bore) (inches) | Number of Bolt Holes | Bolt Hole Diameter (inches) | Bolt Circle (inches) | Thickness (inches) |
| 4 | 9 | 4.57 | 8 | 3/4 | 7-1/2 | 1-1/8 |
| 5 | 10 | 5.66 | 8 | 7/8 | 8-1/2 | 1-3/16 |
| 6 | 11 | 6.72 | 8 | 7/8 | 9-1/2 | 1-5/16 |
| 8 | 13-1/2 | 8.72 | 8 | 7/8 | 11-3/4 | 1-1/2 |
| 10 | 16 | 10.88 | 12 | 1 | 14-1/4 | 1-9/16 |
| 12 | 19 | 12.88 | 12 | 1 | 17 | 1-3/4 |
| 14 | 21 | 14.19 | 12 | 1-1/8 | 18-3/4 | 1-7/8 |
| 16 | 23-1/2 | 16.19 | 16 | 1-1/8 | 21-1/4 | 2 |
| 18 | 25 | 18.19 | 16 | 1-1/4 | 22-3/4 | 2-1/8 |
| 20 | 27-1/2 | 20.19 | 20 | 1-1/4 | 25 | 2-3/8 |
| 22 | 29-1/2 | 22.19 | 20 | 1-3/8 | 27-1/4 | 2-1/2 |
| 24 | 32 | 24.19 | 20 | 1-3/8 | 29-1/2 | 2-5/8 |
| 26 | 34-1/4 | - | 24 | 1-3/8 | 31-3/4 | 2-3/4 |
| 28 | 36-1/2 | - | 28 | 1-3/8 | 34 | 2-3/4 |
| 30 | 38-3/4 | - | 28 | 1-3/8 | 36 | 2-7/8 |
| 32 | 41-3/4 | - | 28 | 1-5/8 | 38-1/2 | 3 |
| 34 | 43-3/4 | - | 32 | 1-5/8 | 40-1/2 | 3 |
| 36 | 46 | - | 32 | 1-5/8 | 42-3/4 | 3-1/8 |
| 38 | 48-3/4 | - | 32 | 1-5/8 | 45-1/4 | 3-1/8 |
| 40 | 50-3/4 | - | 36 | 1-5/8 | 47-1/4 | 3-1/4 |
| 42 | 53 | - | 36 | 1-5/8 | 49-1/2 | 3-3/8 |
| 44 | 55-1/4 | - | 40 | 1-5/8 | 51-3/4 | 3-3/8 |
| 46 | 57-1/4 | - | 40 | 1-5/8 | 53-3/4 | 3-7/16 |
| 48 | 59-1/2 | - | 44 | 1-5/8 | 56 | 3-1/2 |
| 50 | 61-3/4 | - | 44 | 1-7/8 | 58-1/4 | 3-1/2 |
| 52 | 64 | - | 44 | 1-7/8 | 60-1/2 | 3-5/8 |
| 54 | 66-1/4 | - | 44 | 1-7/8 | 62-3/4 | 3-3/4 |
| 60 | 73 | - | 52 | 1-7/8 | 69-1/4 | 3-7/8 |
| 66 | 80 | - | 52 | 1-7/8 | 76 | 4-1/4 |
| 72 | 86-1/2 | - | 60 | 1-7/8 | 82-1/2 | 4-3/8 |
| 78 | 93 | - | 64 | 2-1/8 | 89 | 4-3/4 |
| 84 | 99-3/4 | - | 64 | 2-1/8 | 95-1/2 | 4-3/4 |
| 90 | 106-1/2 | - | 68 | 2-3/8 | 102 | 5-1/8 |
| 96 | 113-1/4 | - | 68 | 2-3/8 | 108-1/2 | 5-1/8 |
| 102 | 120 | - | 72 | 2-5/8 | 114-1/2 | 5-1/2 |
| 108 | 126-3/4 | - | 72 | 2-5/8 | 120-3/4 | 5-1/2 |
| 114 | 133-1/2 | - | 76 | 2-7/8 | 126-3/4 | 5-7/8 |
| 120 | 140-1/4 | - | 76 | 2-7/8 | 132-3/4 | 5-7/8 |
| 126 | 147 | - | 80 | 3-1/8 | 139-1/4 | 6-1/4 |
| 132 | 153-3/4 | - | 80 | 3-1/8 | 145-3/4 | 6-1/4 |
| 138 | 160-1/2 | - | 84 | 3-3/8 | 152 | 6-3/4 |
| 144 | 167-1/4 | - | 84 | 3-3/8 | 158-1/4 | 6-3/4 |
| Steel Pipe Flanges for Waterworks Services AWWA C207-94 Class F | ||||||
| Pipe Size (inches) | Outside Diameter (inches) | Inside Diameter (Slip on Bore) (inches) | Number of Bolt Holes | Bolt Hole Diameter (inches) | Bolt Circle (inches) | Thickness (inches) |
| 4 | 10 | 4.57 | 8 | 7/8 | 7-7/8 | 1.13 |
| 5 | 11 | 5.66 | 8 | 7/8 | 9-1/4 | 1.21 |
| 6 | 12-1/2 | 6.72 | 12 | 7/8 | 10-5/8 | 1.31 |
| 8 | 15 | 8.72 | 12 | 1 | 13 | 1.31 |
| 10 | 17-1/2 | 10.88 | 16 | 1-1/8 | 15-1/4 | 1.50 |
| 12 | 20-1/2 | 12.88 | 16 | 1-1/4 | 17-3/4 | 1.63 |
| 14 | 23 | 14.19 | 20 | 1-1/4 | 20-1/4 | 1.94 |
| 16 | 25-1/2 | 16.19 | 20 | 1-3/8 | 22-1/2 | 2.14 |
| 18 | 28 | 18.19 | 24 | 1-3/8 | 24-3/4 | 2.25 |
| 20 | 30-1/2 | 20.19 | 24 | 1-3/8 | 27 | 2.33 |
| 22 | 33 | 22.19 | 24 | 1-3/8 | 29-1/4 | 2.50 |
| 24 | 36 | 24.19 | 24 | 1-5/8 | 32 | 2.69 |
| 26 | 38-1/4 | 26.25 | 28 | 1-7/8 | 34-1/2 | 3.00 |
| 28 | 40-3/4 | 28.25 | 28 | 1-7/8 | 37 | 3.13 |
| 30 | 43 | 30.25 | 28 | 1-7/8 | 39-1/4 | 3.15 |
| 32 | 45-1/4 | 32.25 | 28 | 1-7/8 | 41-1/2 | 3.25 |
| 34 | 47-1/2 | 34.25 | 28 | 1-7/8 | 43-1/2 | 3.38 |
| 36 | 50 | 36.25 | 32 | 2-1/8 | 46 | 3.46 |
| 38 | 52-1/4 | 38.25 | 32 | 2-1/8 | 48 | 3.50 |
| 40 | 54-1/4 | 54.25 | 36 | 2-1/8 | 50-1/4 | 3.63 |
| 42 | 57 | 42.25 | 36 | 2-1/8 | 52-3/4 | 3.81 |
| 44 | 59-1/4 | 44.25 | 36 | 2-1/8 | 55 | 4.00 |
| 46 | 61-1/2 | 46.25 | 40 | 2-1/8 | 57-1/4 | 4.13 |
| 48 | 65 | 48.25 | 40 | 2-1/8 | 60-3/4 | 4.50 |