Standard Dimensions
| Size (in.) |
OD Flange (in.) |
BC Bolt Circle1 (in.) |
T Thickness (in.) |
Bolt Hole Dia. (in.) |
Size Ring Gasket3 (in.) |
Size Full-Face3 Gasket (in.) |
|---|---|---|---|---|---|---|
| 4 | 9.00 | 7.50 | 0.94 | 3/4 | 4 × 6 7/8 | 4 × 9 |
| 6 | 11.00 | 9.50 | 1.00 | 7/8 | 6 × 8 3/4 | 6 × 11 |
| 8 | 13.50 | 11.75 | 1.12 | 7/8 | 8 × 11 | 8 × 13 1/2 |
| 10 | 16.00 | 14.25 | 1.19 | 1 | 10 × 13 3/4 | 10 × 16 |
| 12 | 19.00 | 17.00 | 1.25 | 1 | 12 × 16 1/8 | 12 × 19 |
| 14 | 21.00 | 18.75 | 1.38 | 1 1/8 | 14 × 17 3/4 | 14 × 21 |
| 16 | 23.50 | 21.25 | 1.44 | 1 1/8 | 16 × 20 1/2 | 16 × 23 1/2 |
| 18 | 25.00 | 22.75 | 1.56 | 1 1/4 | 18 × 21 5/8 | 18 × 25 |
| 20 | 27.50 | 25.00 | 1.69 | 1 1/4 | 20 × 23 7/8 | 20 × 27 1/2 |
| 24 | 32.00 | 29.50 | 1.88 | 1 3/8 | 24 × 28 1/4 | 24 × 32 |
| 30 | 38.75 | 36.00 | 2.12 | 1 3/8 | 30 × 34 3⁄4 | 30 × 38 3/4 |
| 36 | 46.00 | 42.75 | 2.38 | 1 5/8 | 36 × 41 1/4 | 36 × 46 |
| 42 | 53.00 | 49.50 | 2.62 | 1 5/8 | 42 × 48 | 42 × 53 |
| 48 | 59.50 | 56.00 | 2.75 | 1 5/8 | 48 × 54 1/2 | 48 × 59 1/2 |
| 54 | 66.25 | 62.75 | 3.00 | 2 | 54 × 61 | 54 × 66 1/4 |
| 60 | 73.00 | 69.25 | 3.12 | 2 | 60 × 67 1/2 | 60 × 73 |
| 642 | 80.00 | 76.00 | 3.38 | 2 | 64 × 74 1/4 | 64 × 80 |
1.) Bolt circle and thickness tolerances are per AWWA C115.
2.) The dimensions of 64" flange correspond with applicable dimensions of 66" Class E flange in ANSI/AWWA C207, and 64" ductile iron flanges can be connected to those flanges.
3.) Shown for information purposes only. AMERICAN Toruseal gaskets are recommended. Various ANSI/AWWA standards recommend the use of only Toruseal type gaskets or ring gaskets for 14" and larger flanges. Facing: Flanges are plain-faced without projection and are furnished smooth or with shallow serrations. Back Facing: Flanges may be back-faced or spot-faced for compliance with the flange thickness tolerance. Flanges: The flanges are adequate for water service of 250 psi working pressure or 350 psi in 4”-24” sizes when employing Toruseal gasket seals. The bolt circle and bolt holes match those of ANSI B16.1 Class 125 flanges and ANSI B16.5 Class 150 flanges. The flanges do not match and cannot be jointed with the ANSI B16.1 Class 250 flanges or with other type flanges. Drilling of flanges can be rotated when required; for those sizes with an even number of bolt holes in each quadrant, pipe can be rotated 45° with standard drilling. See Flanged Fittings for dimensions of flanges larger than 64".