Flange Chart
Flange Table
There are many different standards relating to the sizing and specification of flange & bolt sets world-wide. Please note that the following Flange tables are provided as a guide only.
The flanges listed are available in Stainless Steel and Mild Steel and Special flanges are available upon request.
EN1092-1 PN10
| NB (mm) | Flange dia. (mm) | Thickness (mm) | L & dia. Of bolts (mm) | No. of holes | P.C.D. (mm) |
| 15 | 95 | 14 | M12x45 | 4 | 65 |
| 20 | 105 | 16 | M12x50 | 4 | 75 |
| 25 | 115 | 16 | M12x50 | 4 | 85 |
| 32 | 140 | 18 | M16x60 | 4 | 100 |
| 40 | 150 | 18 | M16x60 | 4 | 110 |
| 50 | 165 | 20 | M16x60 | 4 | 125 |
| 65 | 185 | 20 | M16x60 | 4 | 145 |
| 80 | 200 | 20 | M16x65 | 8 | 160 |
| 100 | 220 | 22 | M16x70 | 8 | 180 |
| 125 | 250 | 22 | M20x70 | 8 | 210 |
| 150 | 285 | 24 | M20x70 | 8 | 240 |
| 200 | 340 | 24 | M20x80 | 8 | 295 |
| 250 | 395 | 26 | M20x80 | 12 | 350 |
| 300 | 445 | 26 | M20x80 | 12 | 400 |
EN1092-1 PN25
| NB (mm) | Flange dia. (mm) | Thickness (mm) | L & dia. Of bolts (mm) | No. of holes | P.C.D. (mm) |
| 15 | 95 | 14 | M12x50 | 4 | 65 |
| 20 | 105 | 16 | M12x55 | 4 | 75 |
| 25 | 115 | 16 | M12x55 | 4 | 85 |
| 32 | 140 | 18 | M16x60 | 4 | 100 |
| 40 | 150 | 18 | M16x60 | 4 | 110 |
| 50 | 165 | 20 | M16x65 | 4 | 125 |
| 65 | 185 | 22 | M16x70 | 8 | 145 |
| 80 | 200 | 24 | M16x70 | 8 | 160 |
| 100 | 235 | 26 | M20x80 | 8 | 190 |
| 125 | 270 | 28 | M24x85 | 8 | 220 |
| 150 | 300 | 30 | M24x100 | 8 | 250 |
| 200 | 360 | 32 | M24x100 | 12 | 310 |
| 250 | 425 | 35 | M27x100 | 12 | 370 |
| 300 | 485 | 38 | M27x110 | 16 | 430 |
EN1092-1 PN16
| NB (mm) | Flange dia. (mm) | Thickness (mm) | L & dia. Of bolts (mm) | No. of holes | P.C.D. (mm) |
| 15 | 95 | 14 | M12x45 | 4 | 65 |
| 20 | 105 | 16 | M12x50 | 4 | 75 |
| 25 | 115 | 16 | M12x50 | 4 | 85 |
| 32 | 140 | 18 | M16x60 | 4 | 100 |
| 40 | 150 | 18 | M16x60 | 4 | 110 |
| 50 | 165 | 20 | M16x60 | 4 | 125 |
| 65 | 185 | 20 | M16x60 | 4 | 145 |
| 80 | 200 | 20 | M16x65 | 8 | 160 |
| 100 | 220 | 22 | M16x70 | 8 | 180 |
| 125 | 250 | 22 | M16x70 | 8 | 210 |
| 150 | 285 | 24 | M20x70 | 8 | 240 |
| 200 | 340 | 26 | M20x90 | 12 | 295 |
| 250 | 405 | 29 | M24x90 | 12 | 355 |
| 300 | 460 | 32 | M24x90 | 12 | 410 |
EN1092-1 PN40
| NB (mm) | Flange dia. (mm) | Thickness (mm) | L & dia. Of bolts (mm) | No. of holes | P.C.D. (mm) |
| 15 | 95 | 14 | M12x50 | 4 | 65 |
| 20 | 105 | 16 | M12x55 | 4 | 75 |
| 25 | 115 | 16 | M12x55 | 4 | 85 |
| 32 | 140 | 18 | M16x60 | 4 | 100 |
| 40 | 150 | 18 | M16x60 | 4 | 110 |
| 50 | 165 | 20 | M16x65 | 4 | 125 |
| 65 | 185 | 22 | M16x70 | 8 | 145 |
| 80 | 200 | 23 | M16x70 | 8 | 160 |
| 100 | 235 | 26 | M20x80 | 8 | 190 |
| 125 | 270 | 28 | M24x85 | 8 | 220 |
| 150 | 300 | 30 | M24x100 | 8 | 250 |
| 200 | 375 | 36 | M27x100 | 12 | 320 |
| 250 | 450 | 42 | M30x110 | 12 | 385 |
| 300 | 515 | 52 | M30x120 | 16 | 450 |
ANSI B16.5 - ASA 150LB
| NB (in) | Flange dia. (mm) | Thickness (mm) | L & dia. Of bolts (mm) | No. of holes | P.C.D. (mm) |
| 1/2” | 88.9 | 11.2 | 15.7 | 4 | 60.5 |
| 3/4” | 98.6 | 12.7 | 15.7 | 4 | 69.9 |
| 1” | 108 | 14.2 | 15.7 | 4 | 79.2 |
| 1 1/4” | 117.3 | 15.7 | 15.7 | 4 | 88.9 |
| 1 1/2” | 127 | 17.5 | 15.7 | 4 | 98.6 |
| 2” | 152.4 | 19.1 | 19.1 | 4 | 120.7 |
| 2 1/2” | 177.8 | 22.4 | 19.1 | 4 | 139.7 |
| 3” | 190.5 | 23.9 | 19.1 | 4 | 152.4 |
| 4” | 228.6 | 23.9 | 19.1 | 8 | 190.5 |
| 5” | 254 | 23.9 | 22.4 | 8 | 215.9 |
| 6” | 279.4 | 25.4 | 22.4 | 8 | 241.3 |
| 8” | 342.9 | 28.4 | 22.4 | 8 | 298.5 |
| 10” | 406.4 | 30.2 | 25.4 | 12 | 362 |
| 12” | 482.6 | 31.8 | 25.4 | 12 | 431.8 |
ANSI B16.5 - ASA 300LB
| NB (in) | Flange dia. (mm) | Thickness (mm) | L & dia. Of bolts (mm) | No. of holes | P.C.D. (mm) |
| 1/2” | 95.3 | 14.2 | 15.7 | 4 | 66.5 |
| 3/4” | 117.3 | 15.7 | 19.1 | 4 | 82.6 |
| 1” | 124 | 17.5 | 19.1 | 4 | 88.9 |
| 1 1/4” | 133.4 | 19.1 | 19.1 | 4 | 98.6 |
| 1 1/2” | 155.4 | 20.6 | 22.4 | 4 | 114.3 |
| 2” | 165.1 | 22.4 | 19.1 | 8 | 127 |
| 2 1/2” | 190.5 | 25.4 | 22.4 | 8 | 149.4 |
| 3” | 209.6 | 28.4 | 22.4 | 8 | 168.1 |
| 4” | 254 | 31.8 | 22.4 | 8 | 200.2 |
| 5” | 279.4 | 35.1 | 22.4 | 8 | 235 |
| 6” | 317.5 | 36.6 | 22.4 | 12 | 269.7 |
| 8” | 381 | 41.1 | 25.4 | 12 | 330.2 |
| 10” | 444.5 | 47.8 | 28.4 | 16 | 387.4 |
| 12” | 520.7 | 50.8 | 31.8 | 16 | 450.9 |
BS10 Table D
| NB (in) | Flange dia. (mm) | Thickness (in) | L & dia. Of bolts (mm) | No. of holes | P.C.D. (in) |
| 1/2” | 3 3/4” | 3/16” | M12x40 | 4 | 2 5/8” |
| 3/4” | 4” | 3/16” | M12x40 | 4 | 2 7/8” |
| 1” | 4 1/2” | 3/16” | M12x40 | 4 | 3 1/4” |
| 1 1/4” | 4 3/4” | 1/4” | M12x40 | 4 | 3 7/16” |
| 1 1/2” | 5 1/4” | 1/4” | M12x40 | 4 | 3 7/8” |
| 2” | 6” | 5/16” | M16x45 | 4 | 4 1/2” |
| 2 1/2” | 6 1/2” | 5/16” | M16x45 | 4 | 5” |
| 3” | 7 1/4” | 3/8” | M16x50 | 4 | 5 3/4” |
| 4” | 8 1/2” | 3/8” | M16x50 | 4 | 7” |
| 5” | 10” | 1/2” | M16x55 | 8 | 8 1/4” |
| 6” | 11” | 1/2” | M16x55 | 8 | 9 1/4” |
| 8” | 13 1/4” | 1/2” | M16x55 | 8 | 11 1/2” |
| 10” | 16” | 5/8” | M20x60 | 8 | 14” |
| 12” | 18” | 3/4” | M20x65 | 12 | 16” |
BS10 Table E
| NB (in) | Flange dia. (mm) | Thickness (in) | L & dia. Of bolts (mm) | No. of holes | P.C.D. (in) |
| 1/2” | 3 3/4” | 1/4” | M12x40 | 4 | 2 5/8” |
| 3/4” | 4” | 1/4” | M12x40 | 4 | 2 7/8” |
| 1” | 4 1/2” | 9/32” | M12x40 | 4 | 3 1/4” |
| 1 1/4” | 4 3/4” | 5/16” | M12x40 | 4 | 3 7/16” |
| 1 1/2” | 5 1/4” | 11/32” | M12x45 | 4 | 3 7/8” |
| 2” | 6” | 3/8” | M16x50 | 4 | 4 1/2” |
| 2 1/2” | 6 1/2” | 13/32” | M16x50 | 4 | 5” |
| 3” | 7 1/4” | 7/16” | M16x50 | 4 | 5 3/4” |
| 4” | 8 1/2” | 1/2” | M16x55 | 8 | 7” |
| 5” | 10” | 9/16” | M16x60 | 8 | 8 1/4” |
| 6” | 11” | 11/16” | M20x65 | 8 | 9 1/4” |
| 8” | 13 1/4” | 3/4” | M20x70 | 8 | 11 1/2” |
| 10” | 16” | 7/8” | M20x75 | 12 | 14” |
| 12” | 18” | 1” | M22x80 | 12 | 16” |