Industry Standard Flanges have no national standard code or are they covered by any governing body.- Bolt circle diameters are 1/8 inch larger than bolt diameter.
Flange - Slip-on, ANSI Class 75, Industry Standard (in) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe
Size (NPS) | Outside
Diameter of Flange A | Diameter
of Raised Face B | Thickness
of Flange
| Diameter
of Bore
| Diameter
of Hub at Base
| Length
of Hub
| Number
of Bolt Holes | Diameter
of Bolt Holes | Bolt
Circle Diameter
| Approx.
Weight |
| 26 | 33 | 30 | 1 1/4 | 26 1/4 | 28 1/2 | 2 1/4 | 32 | 1 | 31 | 120 |
| 28 | 35 | 32 | 1 3/8 | 28 1/4 | 30 1/2 | 2 1/4 | 36 | 1 | 33 | 140 |
| 30 | 37 | 34 | 1 3/8 | 30 1/4 | 32 1/2 | 2 1/4 | 36 | 1 | 35 | 150 |
| 32 | 39 1/2 | 36 1/4 | 1 1/2 | 32 1/4 | 34 5/8 | 2 1/2 | 40 | 1 1/8 | 37 3/8 | 170 |
| 34 | 41 1/2 | 38 1/4 | 1 5/8 | 34 1/4 | 36 5/8 | 2 1/2 | 40 | 1 1/8 | 39 3/8 | 180 |
| 36 | 43 1/2 | 40 1/4 | 1 5/8 | 36 1/4 | 38 5/8 | 2 1/2 | 44 | 1 1/8 | 41 3/8 | 190 |
| 42 | 50 | 46 1/2 | 1 7/8 | 42 1/4 | 44 3/4 | 2 3/4 | 48 | 1 1/4 | 47 3/4 | 235 |
| 48 | 56 | 52 1/2 | 2 1/8 | 48 1/4 | 50 3/4 | 2 7/8 | 56 | 1 1/4 | 53 3/4 | 270 |
| 54 | 62 1/2 | 59 | 2 3/8 | 54 1/4 | 57 1/4 | 3 1/8 | 68 | 1 1/4 | 60 1/4 | 335 |
| 60 | 68 1/2 | 65 | 2 5/8 | 60 1/4 | 63 1/4 | 3 5/8 | 72 | 1 1/4 | 66 1/4 | 450 |
| 66 | 75 1/2 | 71 5/8 | 2 7/8 | 66 1/4 | 69 1/2 | 4 | 72 | 1 3/8 | 73 | 590 |
| 72 | 81 1/2 | 77 5/8 | 3 1/8 | 72 1/4 | 75 1/2 | 4 1/2 | 80 | 1 3/8 | 79 | 730 |
