| NPS | HUB DIA | DIA RF | OUT SIDE DIA | MIN THK FLG | HGT FLG | HUB DIA | DIA OF TAB |
| A | R | O | T | H | X | Tg | |
| 1 | 33.4 | 50.8 | 125 | 36.6 | 81 | 54 | 6.4 |
| 1½ | 48.3 | 73.0 | 155 | 36.6 | 84 | 70 | 6.4 |
| 2 | 60.3 | 92.1 | 165 | 36.6 | 84 | 84 | 6.4 |
| 2½ | 73.0 | 104.8 | 190 | 36.6 | 87 | 100 | 6.4 |
| 3 | 88.9 | 127.0 | 210 | 36.6 | 87 | 117 | 9.5 |
| 4 | 114.3 | 157.2 | 255 | 36.6 | 90 | 146 | 12.7 |
| 6 | 168.3 | 215.9 | 320 | 36.6 | 98 | 206 | 12.7 |
| 8 | 219.1 | 269.9 | 380 | 39.7 | 110 | 260 | 12.7 |
| 10 | 273.0 | 323.8 | 445 | 46.1 | 116 | 321 | 12.7 |
| 12 | 323.8 | 381.0 | 520 | 49.3 | 129 | 375 | 12.7 |
| 14 | 355.6 | 412.8 | 585 | 52.4 | 141 | 425 | 12.7 |
| 16 | 406.4 | 469.9 | 650 | 55.6 | 144 | 483 | 12.7 |
| 18 | 457.0 | 533.4 | 710 | 58.8 | 157 | 533 | 12.7 |
| 20 | 508.0 | 584.2 | 775 | 62.0 | 160 | 587 | 12.7 |
| 24 | 610.0 | 692.2 | 915 | 68.3 | 167 | 702 | 12.7 |
| NPS | A | R | O | T | H | X | Tg |
| HUB DIA | DIA RF | OUT SIDE DIA | MIN THK FLG | HGT FLG | HUB DIA | DIA OF TAB |
| NPS | BOLT CIRCLE | NO OF BOLTS | DIA OF HOLES | DIA STUD BOLTS | STUD BOLT LENGTH |
|---|---|---|---|---|---|
| 1 | 88.9 | 4 | 11/16 | 5/8 | 125 |
| 1½ | 114.3 | 4 | 13/16 | 3/4 | 135 |
| 2 | 127.0 | 8 | 11/16 | 5/8 | 125 |
| 2½ | 149.2 | 8 | 13/16 | 3/4 | 135 |
| 3 | 168.3 | 8 | 13/16 | 3/4 | 135 |
| 4 | 200.0 | 8 | 13/16 | 3/4 | 135 |
| 6 | 269.9 | 12 | 7/8 | 3/4 | 135 |
| 8 | 330.2 | 12 | 1 | 7/8 | 145 |
| 10 | 387.4 | 16 | 1.1/8 | 1 | 165 |
| 12 | 450.8 | 16 | 1¼ | 1.1/8 | 180 |
| 14 | 514.4 | 20 | 1¼ | 1.1/8 | 185 |
| 16 | 571.5 | 20 | 1.3/8 | 1¼ | 195 |
| 18 | 628.6 | 24 | 1.3/8 | 1¼ | 205 |
| 20 | 685.8 | 24 | 1.3/8 | 1¼ | 215 |
| 24 | 812.8 | 24 | 1.5/8 | 1½ | 240 |
| NPS | BOLT CIRCLE | NO OF BOLTS | DIA OF HOLES | DIA STUD BOLTS | STUD BOLT LENGTH |
General Notes:
- Dimensions are in millimeters, except for bolts and bolt holes.
- Height of Raised Face (RF) in CLASS 300 is 2 mm.
- All other dimensions are in accordance with ASME B16.5.
- Ring joint flanges larger than NPS 3 will require angular meter taps.
Notes:
- Other NPT sizes may be furnished if required.
- Bolt lengths for raised face flanges include allowance for orifice and gasket thickness of 6 mm (0.25 in.) for NPS 1 to NPS 12. Bolt lengths for ring-type joint flanges include allowance of 15 mm (0.62 in.) for NPS 1 to NPS 3.
- Bore (B) is to be specified by the purchaser.
- The length of the Stud Bolt does not include the height of the chamfers (points).
TOLERANCES
- Tolerances on all dimensions shall be as shown in ASME B16.5 except for those shown below.
PRESSURE TAP LOCATION
- Tolerances on all dimensions shall be as shown in ASME B16.5 except for those shown below.
- ±0.5 mm (±0.02 in.) for flanges smaller than NPS 4
- ±0.8 mm (±0.03 in.) for flanges NPS 4 and larger
BORE DIAMETER
- Bore diameter tolerance (Welding Neck flanges only) is ±0.5% of nominal value.
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