1. Technical drawings of flange bolting for Class 400 ASME B16.5 flanges.
2. Dimensions of flange bolting for Class 400 ASME B16.5 flanges.
| NPS | O inch mm | W inch mm | m inch | n | d inch | L1 inch mm | L2 inch mm | L3 inch mm |
|---|---|---|---|---|---|---|---|---|
| 1/2" | 3.75 95 | 2.62 66.7 | 5/8 | 4 | 1/2 | 3.00 75 | 2.75 70 | 3.00 75 |
| 3/4" | 4.62 115 | 3.25 82.6 | 3/4 | 4 | 5/8 | 3.50 90 | 3.25 85 | 3.50 90 |
| 1" | 4.88 125 | 3.50 88.9 | 3/4 | 4 | 5/8 | 3.50 90 | 3.25 85 | 3.50 90 |
| 1 1/4" | 5.25 135 | 3.88 98.4 | 3/4 | 4 | 5/8 | 3.75 95 | 3.50 90 | 3.75 95 |
| 1 1/2" | 6.12 155 | 4.50 114.3 | 7/8 | 4 | 3/4 | 4.25 110 | 4.00 100 | 4.25 110 |
| 2" | 6.50 165 | 5.00 127.0 | 7/8 | 8 | 5/8 | 4.25 110 | 4.00 100 | 4.25 110 |
| 2 1/2" | 7.50 190 | 5.88 149.2 | 1 | 8 | 3/4 | 4.75 120 | 4.50 115 | 4.75 120 |
| 3" | 8.25 210 | 6.62 168.3 | 1 | 8 | 3/4 | 5.00 125 | 4.75 120 | 5.00 125 |
| 3 1/2" | 9.00 230 | 7.25 184.2 | 1 1/8 | 8 | 7/8 | 5.50 140 | 5.25 135 | 5.50 140 |
| 4" | 10.00 255 | 7.88 200.0 | 1 | 8 | 7/8 | 5.50 140 | 5.25 135 | 5.50 140 |
| 5" | 11.00 280 | 9.25 235.0 | 1 | 8 | 7/8 | 5.75 145 | 5.25 135 | 5.75 145 |
| 6" | 12.50 320 | 10.62 269.9 | 1 | 12 | 7/8 | 6.00 150 | 5.75 145 | 6.00 150 |
| 8" | 15.00 380 | 13.00 330.0 | 1 1/8 | 12 | 1 | 6.75 170 | 6.50 165 | 6.75 170 |
| 10" | 17.50 445 | 15.25 387.4 | 1 1/4 | 16 | 1 1/8 | 7.50 190 | 7.25 185 | 7.50 190 |
| 12" | 20.50 520 | 17.75 450.8 | 1 3/8 | 16 | 1 1/4 | 8.00 205 | 7.75 195 | 8.00 205 |
| 14" | 23.00 585 | 20.25 514.4 | 1 3/8 | 20 | 1 1/4 | 8.25 210 | 8.00 205 | 8.25 210 |
| 16" | 25.50 650 | 22.50 571.5 | 1 1/2 | 20 | 1 3/8 | 8.75 220 | 8.50 215 | 8.75 220 |
| 18" | 28.00 710 | 24.75 628.6 | 1 1/2 | 24 | 1 3/8 | 9.00 230 | 8.75 220 | 9.00 230 |
| 20" | 30.50 775 | 27.00 685.8 | 1 5/8 | 24 | 1 1/2 | 9.50 240 | 9.25 235 | 9.75 250 |
| 24" | 36.00 915 | 32.00 812.8 | 1 7/8 | 24 | 1 3/4 | 10.50 265 | 10.25 260 | 11.00 280 |
1. NPS refers to Nominal Pipe Size, O – outside diameter of flange, W – Diameter of bolt circle, m – Diameter of bolt holes, n – number of bolts, d – diameter of bolts, L1 – length of stud bolts for 7 mm raised face, L2 – length of stud bolts for male and female tongue and groove, L3 – length of stud bolts for raised face.
2. The bolting of ASME B16.5 class 400 flanges can be furnished as stud bolts with nuts. Stud bolts can be used for flanges with either raised face or ring joint face. All dimensions are provided in mm and inch units.
| ASME B16.5 Flange Bolting Specification by Classes | ||||||
|---|---|---|---|---|---|---|
| Class 150 | Class 300 | Class 400 | Class 600 | Class 900 | Class 1500 | Class 2500 |
