Bolt flange selection chart
In this chapter Pipe flange dimensions and details will be covered in ASME B16.5 – In this standard, consider Pipe Flanges and Flanged Fittings for size NPS ½” to 24” .
More than 24″, from NPS 26” to 60” should be in ASME B16.47. Here only given details for 150 and 300 class flanges size (1/2 TO 24″). rigid coupling
- Class 150 RF Flanges Bolts details in MM and INCH
- Class 300 RF Flanges Bolts details in MM and INCH
Class 150 RF Flanges Bolts details in MM and INCH
Class 150 RF Flanges Bolts details in MM and INCH | |||||||||
Nominal Pipe Size | Flange OD size | Flange thickness (with raised face) | No. Of Bolts | Dia of Bolts(INCH) | Bolt Size Stud | Length of Stud | Machine Bolt Size | Machine Bolt Length | Pipe Size in mm |
1/2 | 90 | 14.7 | 4 | 0.5 | 1/2 | 2-1/4 | M14 | 50 | 15 |
3/4 | 100 | 16.3 | 4 | 0.5 | 1/2 | 2-1/2 | M14 | 50 | 20 |
1 | 110 | 17.9 | 4 | 0.5 | 1/2 | 2-1/2 | M14 | 55 | 25 |
1-1/4 | 115 | 19.5 | 4 | 0.5 | 1/2 | 2-3/4 | M14 | 55 | 32 |
1-1/2 | 125 | 21.1 | 4 | 0.5 | 1/2 | 2-3/4 | M14 | 65 | 40 |
2 | 150 | 22.7 | 4 | 0.63 | 5/8 | 3-1/4 | M16 | 70 | 50 |
2-1/2 | 180 | 25.9 | 4 | 0.63 | 5/8 | 3-1/2 | M16 | 75 | 65 |
3 | 190 | 29 | 4 | 0.63 | 5/8 | 3-1/2 | M16 | 75 | 80 |
3-1/2 | 215 | 30.6 | 8 | 0.63 | 5/8 | 3-1/2 | M16 | 75 | 90 |
4 | 230 | 32.2 | 8 | 0.63 | 5/8 | 3-1/2 | M16 | 75 | 100 |
5 | 255 | 35.4 | 8 | 0.75 | 3/4 | 3-3/4 | M20 | 85 | 125 |
6 | 280 | 37 | 8 | 0.75 | 3/4 | 4 | M20 | 85 | 150 |
8 | 345 | 41.7 | 8 | 0.75 | 3/4 | 4-1/4 | M20 | 90 | 200 |
10 | 405 | 48.1 | 12 | 0.88 | 7/8 | 4-1/2 | M24 | 100 | 250 |
12 | 485 | 51.3 | 12 | 0.88 | 7/8 | 4-3/4 | M24 | 100 | 300 |
14 | 535 | 54.4 | 12 | 1 | 1 | 5-1/4 | M27 | 115 | 350 |
16 | 595 | 57.6 | 16 | 1 | 1 | 5-1/4 | M27 | 115 | 400 |
18 | 635 | 60.8 | 16 | 1.13 | 1 1/8 | 5-3/4 | M30 | 125 | 450 |
20 | 700 | 64 | 20 | 1.13 | 1 1/8 | 6-1/4 | M30 | 140 | 500 |
24 | 815 | 70.3 | 20 | 1.25 | 1 1/4 | 6-3/4 | M33 | 150 | 600 |
Class 300 RF Flanges Bolts details in MM and INCH
Class 300 RF Flanges Bolts details in MM and INCH | |||||||||
Nominal Pipe Size | Flange OD size | Flange thickness (with raised face) | No. of Bolts | Dia of Bolts(INCH) | Bolt Size Stud | Length of Stud | Machine Bolt Size | Machine Bolt Length | Pipe Size in mm |
1/2 | 95 | 14.7 | 4 | 0.5 | 1/2 | 2-1/2 | M14 | 55 | 15 |
3/4 | 115 | 16.3 | 4 | 0.63 | 5/8 | 3 | M16 | 65 | 20 |
1 | 125 | 17.9 | 4 | 0.63 | 5/8 | 3 | M16 | 65 | 25 |
1-1/4 | 135 | 19.5 | 4 | 0.63 | 5/8 | 3-1/4 | M16 | 70 | 32 |
1-1/2 | 155 | 21.1 | 4 | 0.75 | 3/4 | 3-1/2 | M20 | 75 | 40 |
2 | 165 | 22.7 | 8 | 0.63 | 5/8 | 3-1/2 | M16 | 75 | 50 |
2-1/2 | 190 | 25.9 | 8 | 0.75 | 3/4 | 4 | M20 | 85 | 65 |
3 | 210 | 29 | 8 | 0.75 | 3/4 | 4-1/4 | M20 | 90 | 80 |
3-1/2 | 230 | 30.6 | 8 | 0.75 | 3/4 | 4-1/4 | M20 | 95 | 90 |
4 | 255 | 32.2 | 8 | 0.75 | 3/4 | 4-1/2 | M20 | 95 | 100 |
5 | 280 | 35.4 | 8 | 0.75 | 3/4 | 4-3/4 | M20 | 110 | 125 |
6 | 320 | 37 | 12 | 0.75 | 3/4 | 4-3/4 | M20 | 110 | 150 |
8 | 380 | 41.7 | 12 | 0.88 | 7/8 | 5-1/2 | M24 | 120 | 200 |
10 | 445 | 48.1 | 16 | 1 | 12/31 | 6-1/4 | M27 | 140 | 250 |
12 | 520 | 51.3 | 16 | 1.13 | 1 1/8 | 6-3/4 | M30 | 145 | 300 |
14 | 585 | 54.4 | 20 | 1.13 | 1 1/8 | 7 | M30 | 160 | 350 |
16 | 650 | 57.6 | 20 | 1.25 | 1 1/4 | 7-1/2 | M33 | 165 | 400 |
18 | 710 | 60.8 | 24 | 1.25 | 1 1/4 | 7-3/4 | M33 | 170 | 450 |
20 | 775 | 64 | 24 | 1.25 | 1 1/4 | 8 | M33 | 185 | 500 |
24 | 915 | 70.3 | 24 | 1.5 | 1 1/2 | 9 | M39 | 205 | 600 |