The charts show the dimensions of weld neck flange class 150, 300, 400, 900, 1500, 2500 in inches and in millimeters (with dimensional tolerances).
WELDING NECK FLANGE DIMENSIONS IN INCHES
WN CLASS 150 (IN INCH)
Weld neck flange dimensions class 150 (ASME B16.5) in inches
Flange NPS | Inside Diameter |
Outside Diameter |
Bolt Circle (BC) |
Raised Face (R) |
Raised Face (RF) |
H | H1 | Raised Face Thickness (T) |
T1 | Flat Face Thickness (T2) |
Bolt Hole (B) |
No. of Bolt Holes |
---|---|---|---|---|---|---|---|---|---|---|---|---|
1/2″ | 0.62″ | 3.50″ | 2.38″ | 1.38″ | .063″ | 1.19″ | 0.84″ | 1.88″ | .38″ | 1.82″ | .62″ | 4 |
3/4″ | 0.82″ | 3.88″ | 2.75″ | 1.69″ | .063″ | 1.50″ | 1.05″ | 2.06″ | .44″ | 2.00″ | .62″ | 4 |
1″ | 1.05″ | 4.25″ | 3.12″ | 2.00″ | .063″ | 1.94″ | 1.32″ | 2.19″ | .50″ | 2.13″ | .62″ | 4 |
1-1/4″ | 1.38″ | 4.62″ | 3.50″ | 2.50″ | .063″ | 2.31″ | 1.66″ | 2.25″ | .56″ | 2.19″ | .62″ | 4 |
1-1/2″ | 1.61″ | 5.00″ | 3.88″ | 2.88″ | .063″ | 2.56″ | 1.90″ | 2.44″ | .62″ | 2.38″ | .62″ | 4 |
2″ | 2.07″ | 6.00″ | 4.75″ | 3.62″ | .063″ | 3.06″ | 2.38″ | 2.50″ | .69″ | 2.44″ | .75″ | 4 |
2-1/2″ | 2.47″ | 7.00″ | 5.50″ | 4.12″ | .063″ | 3.56″ | 2.88″ | 2.75″ | .82″ | 2.69″ | .75″ | 4 |
3″ | 3.07″ | 7.50″ | 6.00″ | 5.00″ | .063″ | 4.25″ | 3.50″ | 2.75″ | .88″ | 2.69″ | .75″ | 4 |
3-1/2″ | 3.55″ | 8.50″ | 7.00″ | 5.50″ | .063″ | 4.81″ | 4.00″ | 2.81″ | .88″ | 2.75″ | .75″ | 8 |
4″ | 4.03″ | 9.00″ | 7.50″ | 6.19″ | .063″ | 5.31″ | 4.50″ | 3.00″ | .88″ | 2.94″ | .75″ | 8 |
5″ | 5.05″ | 10.00″ | 8.50″ | 7.31″ | .063″ | 6.44″ | 5.56″ | 3.50″ | .88″ | 3.44″ | .88″ | 8 |
6″ | 6.07″ | 11.00″ | 9.50″ | 8.50″ | .063″ | 7.56″ | 6.63″ | 3.50″ | .94″ | 3.44″ | .88″ | 8 |
8″ | 7.98″ | 13.50″ | 11.75″ | 10.62″ | .063″ | 9.69″ | 8.63″ | 4.00″ | 1.06″ | 3.94″ | .88″ | 8 |
10″ | 10.02″ | 16.00″ | 14.25″ | 12.75″ | .063″ | 12.00″ | 10.75″ | 4.00″ | 1.13″ | 3.94″ | 1.00″ | 12 |
12″ | 12.00″ | 19.00″ | 17.00″ | 15.00″ | .063″ | 14.38″ | 12.75″ | 4.50″ | 1.19″ | 4.44″ | 1.00″ | 12 |
14″ | 13.25″ | 21.00″ | 18.75″ | 16.25″ | .063″ | 15.75″ | 14.00″ | 5.00″ | 1.32″ | 4.94″ | 1.12″ | 12 |
16″ | 15.25″ | 23.50″ | 21.25″ | 18.50″ | .063″ | 18.00″ | 16.00″ | 5.00″ | 1.38″ | 4.94″ | 1.12″ | 16 |
18″ | 17.25″ | 25.00″ | 22.75″ | 21.00″ | .063″ | 19.88″ | 18.00″ | 5.50″ | 1.50″ | 5.44″ | 1.25″ | 16 |
20″ | 19.25″ | 27.50″ | 25.00″ | 23.00″ | .063″ | 22.00″ | 20.00″ | 5.69″ | 1.63″ | 5.63″ | 1.25″ | 20 |
22″ | 21.25″ | 29.50″ | 27.25″ | 25.25″ | .063″ | 24.25″ | 22.00″ | 5.88″ | 1.75″ | 5.82″ | 1.38″ | 20 |
24″ | 23.25″ | 32.00″ | 29.50″ | 27.25″ | .063″ | 26.12″ | 24.00″ | 6.00″ | 1.82″ | 5.94″ | 1.38″ | 20 |
WN CLASS 300 (IN INCH)
Weld neck flange dimensions class 300 (ASME B16.5) in inches
Flange NPS | Inside Diameter |
Outside Diameter |
Bolt Circle (BC) |
Raised Face (R) |
Raised Face (RF) |
H | H1 | Raised Face Thickness (T) |
T1 | Flat Face Thickness (T2) |
Bolt Hole (B) |
No. of Bolt Holes |
---|---|---|---|---|---|---|---|---|---|---|---|---|
1/2″ | 0.62″ | 3.75″ | 2.62″ | 1.38″ | .063″ | 1.50″ | 0.84″ | 2.06″ | .50″ | 2.00″ | 0.62″ | 4 |
3/4″ | 0.82″ | 4.62″ | 3.25″ | 1.69″ | .063″ | 1.88″ | 1.05″ | 2.25″ | .56″ | 2.19″ | 0.75″ | 4 |
1″ | 1.05″ | 4.88″ | 3.50″ | 2.00″ | .063″ | 2.12″ | 1.32″ | 2.44″ | .63″ | 2.38″ | 0.75″ | 4 |
1-1/4″ | 1.38″ | 5.25″ | 3.88″ | 2.50″ | .063″ | 2.50″ | 1.66″ | 2.56″ | .69″ | 2.50″ | 0.75″ | 4 |
1-1/2″ | 1.61″ | 6.12″ | 4.50″ | 2.88″ | .063″ | 2.75″ | 1.90″ | 2.69″ | .75″ | 2.63″ | 0.88″ | 4 |
2″ | 2.07″ | 6.50″ | 5.00″ | 3.62″ | .063″ | 3.31″ | 2.38″ | 2.75″ | .82″ | 2.69″ | 0.75″ | 8 |
2-1/2″ | 2.47″ | 7.50″ | 5.88″ | 4.12″ | .063″ | 3.94″ | 2.88″ | 3.00″ | .94″ | 2.94″ | 0.88″ | 8 |
3″ | 3.07″ | 8.25″ | 6.62″ | 5.00″ | .063″ | 4.62″ | 3.50″ | 3.12″ | 1.06″ | 3.06″ | 0.88″ | 8 |
3-1/2″ | 3.55″ | 9.00″ | 7.25″ | 5.50″ | .063″ | 5.25″ | 4.00″ | 3.19″ | 1.13″ | 3.13″ | 0.88″ | 8 |
4″ | 4.03″ | 10.00″ | 7.88″ | 6.19″ | .063″ | 5.75″ | 4.50″ | 3.38″ | 1.19″ | 3.32″ | 0.88″ | 8 |
5″ | 5.05″ | 11.00″ | 9.25″ | 7.31″ | .063″ | 7.00″ | 5.56″ | 3.88″ | 1.32″ | 3.82″ | 0.88″ | 8 |
6″ | 6.07″ | 12.50″ | 10.62″ | 8.50″ | .063″ | 8.12″ | 6.63″ | 3.88″ | 1.38″ | 3.82″ | 0.88″ | 12 |
8″ | 7.98″ | 15.00″ | 13.00″ | 10.62″ | .063″ | 10.25″ | 8.63″ | 4.38″ | 1.56″ | 4.32″ | 1.00″ | 12 |
10″ | 10.02″ | 17.50″ | 15.25″ | 12.75″ | .063″ | 12.62″ | 10.75″ | 4.62″ | 1.82″ | 4.56″ | 1.12″ | 16 |
12″ | 12.00″ | 20.50″ | 17.75″ | 15.00″ | .063″ | 14.75″ | 12.75″ | 5.12″ | 1.94″ | 5.06″ | 1.25″ | 16 |
14″ | 13.25″ | 23.00″ | 20.25″ | 16.25″ | .063″ | 16.75″ | 14.00″ | 5.62″ | 2.06″ | 5.56″ | 1.25″ | 20 |
16″ | 15.25″ | 25.50″ | 22.50″ | 18.50″ | .063″ | 19.00″ | 16.00″ | 5.75″ | 2.19″ | 5.69″ | 1.38″ | 20 |
18″ | 17.25″ | 28.00″ | 24.75″ | 21.00″ | .063″ | 21.00″ | 18.00″ | 6.25″ | 2.32″ | 6.19″ | 1.38″ | 24 |
20″ | 19.25″ | 30.50″ | 27.00″ | 23.00″ | .063″ | 23.12″ | 20.00″ | 6.38″ | 2.44″ | 6.32″ | 1.38″ | 24 |
22″ | 21.25″ | 33.00″ | 29.25″ | 25.25″ | .063″ | 25.25″ | 22.00″ | 6.50″ | 2.57″ | 6.44″ | 1.62″ | 24 |
24″ | 23.25″ | 36.00″ | 32.0″ | 27.25″ | .063″ | 27.62″ | 24.00″ | 6.62″ | 2.69″ | 6.56″ | 1.62″ | 24 |
WN CLASS 400 (IN INCH)
Weld neck flange dimensions class 400 (ASME B16.5) in inches
Flange NPS | Inside Diameter |
Outside Diameter |
Bolt Circle (BC) |
Raised Face (R) |
Raised Face (RF) |
H | H1 | Raised Face Thickness (T) |
T1 | Flat Face Thickness (T2) |
Bolt Hole (B) |
No. of Bolt Holes |
---|---|---|---|---|---|---|---|---|---|---|---|---|
1/2″ | .55″ | 3.75″ | 2.62″ | 1.38″ | .250″ | 1.50″ | 0.84″ | 2.31″ | 0.56″ | 2.06″ | 0.62″ | 4 |
3/4″ | .74″ | 4.62″ | 3.25″ | 1.69″ | .250″ | 1.88″ | 1.05″ | 2.50″ | 0.62″ | 2.25″ | 0.75″ | 4 |
1″ | .96″ | 4.88″ | 3.50″ | 2.00″ | .250″ | 2.12″ | 1.32″ | 2.69″ | 0.69″ | 2.44″ | 0.75″ | 4 |
1-1/4″ | 1.28″ | 5.25″ | 3.88″ | 2.50″ | .250″ | 2.50″ | 1.66″ | 2.87″ | 0.81″ | 2.62″ | 0.75″ | 4 |
1-1/2″ | 1.50″ | 6.12″ | 4.50″ | 2.88″ | .250″ | 2.75″ | 1.90″ | 3.00″ | 0.88″ | 2.75″ | 0.88″ | 4 |
2″ | 1.94″ | 6.50″ | 5.00″ | 3.62″ | .250″ | 3.31″ | 2.38″ | 3.13″ | 1.00″ | 2.88″ | 0.75″ | 8 |
2-1/2″ | 2.32″ | 7.50″ | 5.88″ | 4.12″ | .250″ | 3.94″ | 2.88″ | 3.37″ | 1.12″ | 3.12″ | 0.88″ | 8 |
3″ | 2.90″ | 8.25″ | 6.62″ | 5.00″ | .250″ | 4.62″ | 3.50″ | 3.50″ | 1.25″ | 3.25″ | 0.88″ | 8 |
3-1/2″ | 3.36″ | 9.00″ | 7.25″ | 5.50″ | .250″ | 5.25″ | 4.00″ | 3.63″ | 1.38″ | 3.38″ | 1.00″ | 8 |
4″ | 3.83″ | 10.00″ | 7.88″ | 6.19″ | .250″ | 5.75″ | 4.50″ | 3.75″ | 1.38″ | 3.50″ | 1.00″ | 8 |
5″ | 4.81″ | 11.00″ | 9.25″ | 7.31″ | .250″ | 7.00″ | 5.56″ | 4.25″ | 1.50″ | 4.00″ | 1.00″ | 8 |
6″ | 5.76″ | 12.50″ | 10.62″ | 8.50″ | .250″ | 8.12″ | 6.63″ | 4.31″ | 1.62″ | 4.06″ | 1.00″ | 12 |
8″ | 7.63″ | 15.00″ | 13.00″ | 10.62″ | .250″ | 10.25″ | 8.63″ | 4.87″ | 1.88″ | 4.62″ | 1.12″ | 12 |
10″ | 9.75″ | 17.50″ | 15.25″ | 12.75″ | .250″ | 12.62″ | 10.75″ | 5.13″ | 2.12″ | 4.88″ | 1.25″ | 16 |
12″ | 11.75″ | 20.50″ | 17.75″ | 15.00″ | .250″ | 14.75″ | 12.75″ | 5.63″ | 2.25″ | 5.38″ | 1.38″ | 16 |
14″ | 13.00″ | 23.00″ | 20.25″ | 16.25″ | .250″ | 16.75″ | 14.00″ | 6.13″ | 2.38″ | 5.88″ | 1.38″ | 20 |
16″ | 15.00″ | 25.50″ | 22.50″ | 18.50″ | .250″ | 19.00″ | 16.00″ | 6.25″ | 2.50″ | 6.00″ | 1.50″ | 20 |
18″ | 17.00″ | 28.00″ | 24.75″ | 21.00″ | .250″ | 21.00″ | 18.00″ | 6.75″ | 2.62″ | 6.50″ | 1.50″ | 24 |
20″ | 19.00″ | 30.50″ | 27.00″ | 23.00″ | .250″ | 23.12″ | 20.00″ | 6.87″ | 2.75″ | 6.62″ | 1.62″ | 24 |
22″ | 21.00″ | 33.00″ | 29.25″ | 25.25″ | .250″ | 25.25″ | 22.00″ | 7.00″ | 2.88″ | 6.75″ | 1.75″ | 24 |
24″ | 23.00″ | 36.00″ | 32.00″ | 27.25″ | .250″ | 27.62″ | 24.00″ | 7.13″ | 3.00″ | 6.88″ | 1.88″ | 24 |
WN CLASS 600 (IN INCH)
Weld neck flange dimensions class 600 (ASME B16.5) in inches
Flange NPS | Inside Diameter |
Outside Diameter |
Bolt Circle (BC) |
Raised Face (R) |
Raised Face (RF) |
H | H1 | Raised Face Thickness (T) |
T1 | Flat Face Thickness (T2) |
Bolt Hole (B) |
No. of Bolt Holes |
---|---|---|---|---|---|---|---|---|---|---|---|---|
1/2″ | 0.55″ | 3.75″ | 2.62″ | 1.38″ | .250″ | 1.50″ | 0.84″ | 2.31″ | 0.56″ | 2.06″ | 0.62″ | 4 |
3/4″ | 0.74″ | 4.62″ | 3.25″ | 1.69″ | .250″ | 1.88″ | 1.05″ | 2.50″ | 0.62″ | 2.25″ | 0.75″ | 4 |
1″ | 0.96″ | 4.88″ | 3.50″ | 2.00″ | .250″ | 2.12″ | 1.32″ | 2.69″ | 0.69″ | 2.44″ | 0.75″ | 4 |
1-1/4″ | 1.28″ | 5.25″ | 3.88″ | 2.50″ | .250″ | 2.50″ | 1.66″ | 2.87″ | 0.81″ | 2.62″ | 0.75″ | 4 |
1-1/2″ | 1.50″ | 6.12″ | 4.50″ | 2.88″ | .250″ | 2.75″ | 1.90″ | 3.00″ | 0.88″ | 2.75″ | 0.88″ | 4 |
2″ | 1.94″ | 6.50″ | 5.00″ | 3.62″ | .250″ | 3.31″ | 2.38″ | 3.13″ | 1.00″ | 2.88″ | 0.75″ | 8 |
2-1/2″ | 2.32″ | 7.50″ | 5.88″ | 4.12″ | .250″ | 3.94″ | 2.88″ | 3.37″ | 1.12″ | 3.12″ | 0.88″ | 8 |
3″ | 2.90″ | 8.25″ | 6.62″ | 5.00″ | .250″ | 4.62″ | 3.50″ | 3.50″ | 1.25″ | 3.25″ | 0.88″ | 8 |
3-1/2″ | 3.36″ | 9.00″ | 7.25″ | 5.50″ | .250″ | 5.25″ | 4.00″ | 3.63″ | 1.38″ | 3.38″ | 1.00″ | 8 |
4″ | 3.83″ | 10.75″ | 8.50″ | 6.19″ | .250″ | 6.00″ | 4.50″ | 4.25″ | 1.5″ | 4.00″ | 1.00″ | 8 |
5″ | 4.81″ | 13.00″ | 10.50″ | 7.31″ | .250″ | 7.44″ | 5.56″ | 4.75″ | 1.75″ | 4.50″ | 1.12″ | 8 |
6″ | 5.76″ | 14.00″ | 11.50″ | 8.50″ | .250″ | 8.75″ | 6.63″ | 4.87″ | 1.88″ | 4.62″ | 1.12″ | 12 |
8″ | 7.63″ | 16.50″ | 13.75″ | 10.62″ | .250″ | 10.75″ | 8.63″ | 5.50″ | 2.19″ | 5.25″ | 1.25″ | 12 |
10″ | 9.75″ | 20.00″ | 17.00″ | 12.75″ | .250″ | 13.5″ | 10.75″ | 6.25″ | 2.50″ | 6.00″ | 1.38″ | 16 |
12″ | 11.75″ | 22.00″ | 19.25″ | 15.00″ | .250″ | 15.75″ | 12.75″ | 6.37″ | 2.62″ | 6.12″ | 1.38″ | 20 |
14″ | 13.00″ | 23.75″ | 20.75″ | 16.25″ | .250″ | 17.00″ | 14.00″ | 6.75″ | 2.75″ | 6.50″ | 1.50″ | 20 |
16″ | 15.00″ | 27.00″ | 23.75″ | 18.50″ | .250″ | 19.50″ | 16.00″ | 7.25″ | 3.00″ | 7.00″ | 1.62″ | 20 |
18″ | 17.00″ | 29.25″ | 25.75″ | 21.00″ | .250″ | 21.50″ | 18.00″ | 7.50″ | 3.25″ | 7.25″ | 1.75″ | 20 |
20″ | 19.00″ | 32.00″ | 28.50″ | 23.00″ | .250″ | 24.00″ | 20.00″ | 7.75″ | 3.50″ | 7.50″ | 1.75″ | 24 |
22″ | 21.00″ | 34.25″ | 30.63″ | 25.25″ | .250″ | 26.25″ | 22.00″ | 8.00″ | 3.75″ | 7.75″ | 1.75″ | 24 |
24″ | 23.00″ | 37.00″ | 33.00″ | 27.25″ | .250″ | 28.25″ | 24.00″ | 8.25″ | 4.00″ | 8.00″ | 2.00″ | 24 |
WN CLASS 900 (IN INCH)
Weld neck flange dimensions class 900 (ASME B16.5) in inches
Flange NPS | Inside Diameter |
Outside Diameter |
Bolt Circle (BC) |
Raised Face (R) |
Raised Face (RF) |
H | H1 | Raised Face Thickness (T) |
T1 | Flat Face Thickness (T2) |
Bolt Hole (B) |
No. of Bolt Holes |
---|---|---|---|---|---|---|---|---|---|---|---|---|
3″ | 2.90″ | 9.50″ | 7.50″ | 5.00″ | .250″ | 5.00″ | 3.50″ | 4.25″ | 1.50″ | 4.00″ | 1.00″ | 8 |
4″ | 3.83″ | 11.50″ | 9.25″ | 6.19″ | .250″ | 6.25″ | 4.50″ | 4.75″ | 1.75″ | 4.50″ | 1.25″ | 8 |
5″ | 4.81″ | 13.75″ | 11.00″ | 7.31″ | .250″ | 7.50″ | 5.56″ | 5.25″ | 3.00″ | 5.00″ | 1.38″ | 8 |
6″ | 5.76″ | 15.00″ | 12.50″ | 8.50″ | .250″ | 9.25″ | 6.63″ | 5.75″ | 2.19″ | 5.50″ | 1.25″ | 12 |
8″ | 7.63″ | 18.50″ | 15.50″ | 10.63″ | .250″ | 11.75″ | 8.63″ | 6.63″ | 2.50″ | 6.38″ | 1.50″ | 12 |
10″ | 9.75″ | 21.50″ | 18.50″ | 12.75″ | .250″ | 14.50″ | 10.75″ | 7.50″ | 2.75″ | 7.25″ | 1.50″ | 16 |
12″ | 11.75″ | 24.00″ | 21.00″ | 15.00″ | .250″ | 16.50″ | 12.75″ | 8.13″ | 3.13″ | 7.88″ | 1.50″ | 20 |
14″ | 13.00″ | 25.25″ | 22.00″ | 16.25″ | .250″ | 17.75″ | 14.00″ | 8.63″ | 3.38″ | 8.38″ | 1.63″ | 20 |
16″ | 15.00″ | 27.75″ | 24.25″ | 18.50″ | .250″ | 20.00″ | 16.00″ | 8.75″ | 3.50″ | 8.50″ | 1.75″ | 20 |
18″ | 17.00″ | 31.00″ | 27.00″ | 21.00″ | .250″ | 22.25″ | 18.00″ | 9.25″ | 4.00″ | 9.00″ | 2.00″ | 20 |
20″ | 19.00″ | 33.75″ | 29.50″ | 23.00″ | .250″ | 24.50″ | 20.00″ | 10.00″ | 4.25″ | 9.75″ | 2.13″ | 20 |
24″ | 23.00″ | 41.00″ | 35.50″ | 27.25″ | .250″ | 29.50″ | 24.00″ | 11.75″ | 5.50″ | 11.50″ | 2.63″ | 20 |
WN CLASS 1500 (IN INCH)
Weld neck flange dimensions class 1500 (ASME B16.5) in inches
Flange NPS | Inside Diameter |
Outside Diameter |
Bolt Circle (BC) |
Raised Face (R) |
Raised Face (RF) |
H | H1 | Raised Face Thickness (T) |
T1 | Flat Face Thickness (T2) |
Bolt Hole (B) |
No. of Bolt Holes |
---|---|---|---|---|---|---|---|---|---|---|---|---|
1/2″ | 0.55″ | 4.75″ | 3.25″ | 1.38″ | .250″ | 1.50″ | 0.84″ | 2.63″ | 0.88″ | 2.38″ | 0.88″ | 4 |
3/4″ | 0.74″ | 5.13″ | 3.50″ | 1.69″ | .250″ | 1.75″ | 1.05″ | 3.00″ | 1.00″ | 2.75″ | 0.88″ | 4 |
1″ | 0.96″ | 5.88″ | 4.00″ | 2.00″ | .250″ | 2.06″ | 1.32″ | 3.13″ | 1.13″ | 2.88″ | 1.00″ | 4 |
1-1/4″ | 1.28″ | 6.25″ | 4.38″ | 2.50″ | .250″ | 2.50″ | 1.66″ | 3.13″ | 1.13″ | 2.88″ | 1.00″ | 4 |
1-1/2″ | 1.50″ | 7.00″ | 4.88″ | 2.88″ | .250″ | 2.75″ | 1.90″ | 3.50″ | 1.25″ | 3.25″ | 1.13″ | 4 |
2″ | 1.94″ | 8.50″ | 6.50″ | 3.63″ | .250″ | 4.13″ | 2.38″ | 4.25″ | 1.50″ | 4.00″ | 1.00″ | 8 |
2-1/2″ | 2.32″ | 9.63″ | 7.50″ | 4.13″ | .250″ | 4.88″ | 2.88″ | 4.38″ | 1.63″ | 4.13″ | 1.13″ | 8 |
3″ | 2.90″ | 10.50″ | 8.00″ | 5.00″ | .250″ | 5.25″ | 3.50″ | 4.88″ | 1.88″ | 4.63″ | 1.25″ | 8 |
4″ | 3.83″ | 12.25″ | 9.50″ | 6.19″ | .250″ | 6.38″ | 4.50″ | 5.13″ | 2.13″ | 4.88″ | 1.38″ | 8 |
5″ | 4.81″ | 14.75″ | 11.50″ | 7.31″ | .250″ | 7.75″ | 5.56″ | 6.38″ | 2.88″ | 6.13″ | 1.63″ | 8 |
6″ | 5.76″ | 15.50″ | 12.50″ | 8.50″ | .250″ | 9.00″ | 6.63″ | 7.00″ | 3.25″ | 6.75″ | 1.50″ | 12 |
8″ | 7.63″ | 19.00″ | 15.50″ | 10.63″ | .250″ | 11.50″ | 8.63″ | 8.63″ | 3.63″ | 8.38″ | 1.75″ | 12 |
10″ | 9.75″ | 23.00″ | 19.00″ | 12.75″ | .250″ | 14.50″ | 10.75″ | 10.25″ | 4.25″ | 10.00″ | 2.00″ | 12 |
12″ | 11.75″ | 26.50″ | 22.50″ | 15.00″ | .250″ | 17.75″ | 12.75″ | 11.38″ | 4.88″ | 11.13″ | 2.13″ | 16 |
14″ | 13.00″ | 29.50″ | 25.00″ | 16.25″ | .250″ | 19.50″ | 14.00″ | 12.00″ | 5.25″ | 11.75″ | 2.38″ | 16 |
16″ | 15.00″ | 32.50″ | 27.75″ | 18.50″ | .250″ | 21.75″ | 16.00″ | 12.50″ | 5.75″ | 12.25″ | 2.63″ | 16 |
18″ | 17.00″ | 36.00″ | 30.50″ | 21.00″ | .250″ | 23.50″ | 18.00″ | 13.13″ | 6.38″ | 12.88″ | 2.88″ | 16 |
20″ | 19.00″ | 38.75″ | 32.75″ | 23.00″ | .250″ | 25.25″ | 20.00″ | 14.25″ | 7.00″ | 14.00″ | 3.13″ | 16 |
24″ | 23.00″ | 46.00″ | 39.00″ | 27.25″ | .250″ | 30.00″ | 24.00″ | 16.25″ | 8.00″ | 16.00″ | 3.63″ | 16 |
WN CLASS 2500 (IN INCH)
Weld neck flange dimensions class 2500 (ASME B16.5) in inches
Flange NPS | Inside Diameter |
Outside Diameter |
Bolt Circle (BC) |
Raised Face (R) |
Raised Face (RF) |
H | H1 | Raised Face Thickness (T) |
T1 | Flat Face Thickness (T2) |
Bolt Hole (B) |
No. of Bolt Holes |
---|---|---|---|---|---|---|---|---|---|---|---|---|
1/2″ | 0.55″ | 5.25″ | 3.50″ | 1.38″ | .250″ | 1.69″ | 0.84″ | 3.13″ | 1.19″ | 2.88″ | 0.88″ | 4 |
3/4″ | 0.74″ | 5.50″ | 3.75″ | 1.69″ | .250″ | 2.00″ | 1.05″ | 3.38″ | 1.25″ | 3.13″ | 0.88″ | 4 |
1″ | 0.96″ | 6.25″ | 4.25″ | 2.00″ | .250″ | 2.25″ | 1.32″ | 3.75″ | 1.38″ | 3.50″ | 1.00″ | 4 |
1-1/4″ | 1.28″ | 7.25″ | 5.13″ | 2.50″ | .250″ | 2.88″ | 1.66″ | 4.00″ | 1.50″ | 3.75″ | 1.13″ | 4 |
1-1/2″ | 1.50″ | 8.00″ | 5.75″ | 2.88″ | .250″ | 3.13″ | 1.90″ | 4.63″ | 1.75″ | 4.38″ | 1.25″ | 4 |
2″ | 1.94″ | 9.25″ | 6.75″ | 3.63″ | .250″ | 3.75″ | 2.38″ | 5.25″ | 2.00″ | 5.00″ | 1.13″ | 8 |
2-1/2″ | 2.32″ | 10.50″ | 7.75″ | 4.13″ | .250″ | 4.50″ | 2.88″ | 5.88″ | 2.25″ | 5.63″ | 1.25″ | 8 |
3″ | 2.90″ | 12.00″ | 9.00″ | 5.00″ | .250″ | 5.25″ | 3.50″ | 6.88″ | 2.63″ | 6.63″ | 1.38″ | 8 |
4″ | 3.83″ | 14.00″ | 10.75″ | 6.19″ | .250″ | 6.50″ | 4.50″ | 7.75″ | 3.00″ | 7.50″ | 1.63″ | 8 |
5″ | 4.81″ | 16.50″ | 12.75″ | 7.31″ | .250″ | 8.00″ | 5.56″ | 9.25″ | 3.63″ | 9.00″ | 1.88″ | 8 |
6″ | 5.76″ | 19.00″ | 14.50″ | 8.50″ | .250″ | 9.25″ | 6.63″ | 11.00″ | 4.25″ | 10.75″ | 2.13″ | 8 |
8″ | 7.63″ | 21.75″ | 17.25″ | 10.63″ | .250″ | 12.00″ | 8.63″ | 12.75″ | 5.00″ | 12.50″ | 2.13″ | 12 |
10″ | 9.75″ | 26.50″ | 21.25″ | 12.75″ | .250″ | 14.75″ | 10.75″ | 16.75″ | 6.50″ | 16.50″ | 2.63″ | 12 |
12″ | 11.75″ | 30.00″ | 24.38″ | 15.00″ | .250″ | 17.38″ | 12.75″ | 18.50″ | 7.25″ | 18.25″ | 2.88″ | 12 |
WELDING NECK FLANGE DIMENSIONS IN MILLIMETERS
WN CLASS 150 (IN MM)
Weld neck flange dimensions class 150 (ASME B16.5) in millimeters
Size inch |
D mm |
X mm |
G mm |
t mm |
B1 mm |
T1 mm |
A mm |
---|---|---|---|---|---|---|---|
1/2 | 89 | 30.2 | 35.1 | 11.2 | 15.7 | 47.8 | 21.3 |
3/4 | 99 | 38.1 | 42.9 | 12.7 | 20.8 | 52.3 | 26.7 |
1 | 108 | 49.3 | 50.8 | 14.2 | 26.7 | 55.6 | 33.5 |
1¼ | 117 | 58.7 | 63.5 | 15.7 | 35.1 | 57.2 | 42.2 |
1½ | 127 | 65.0 | 73.2 | 17.5 | 40.9 | 62.0 | 48.3 |
2 | 152 | 77.7 | 91.9 | 19.1 | 52.6 | 63.5 | 60.5 |
2½ | 178 | 90.4 | 104.6 | 22.4 | 62.7 | 69.9 | 73.2 |
3 | 191 | 108.0 | 127.0 | 23.9 | 78.0 | 69.9 | 88.9 |
3½ | 216 | 122.2 | 139.7 | 23.9 | 90.2 | 71.4 | 101.6 |
4 | 229 | 134.9 | 157.2 | 23.9 | 102.4 | 76.2 | 114.3 |
5 | 254 | 163.6 | 185.7 | 23.9 | 128.3 | 88.9 | 141.2 |
6 | 279 | 192.0 | 215.9 | 25.4 | 154.2 | 88.9 | 168.4 |
8 | 343 | 246.1 | 269.7 | 28.4 | 202.7 | 101.6 | 218.2 |
10 | 406 | 304.8 | 323.9 | 30.2 | 254.5 | 101.6 | 273.1 |
12 | 483 | 365.3 | 381.0 | 31.8 | 304.8 | 114.3 | 323.9 |
14 | 533 | 400.1 | 412.8 | 35.1 | 336.6 | 127.0 | 355.6 |
16 | 597 | 457.2 | 469.9 | 36.6 | 387.4 | 127.0 | 406.4 |
18 | 635 | 505.0 | 533.4 | 39.6 | 438.2 | 139.7 | 457.2 |
20 | 699 | 558.8 | 584.2 | 42.9 | 489.0 | 144.5 | 508.0 |
24 | 813 | 663.4 | 692.2 | 47.8 | 590.6 | 152.4 | 609.6 |
Size | Bolt Drilling | Bolting Requirements | |||||
---|---|---|---|---|---|---|---|
inch | Bolt circle Diameter mm |
Holes # | Holes Dia. mm | Bolt Dia. inch. | Length FF Flange |
Length RF Flange |
Length RTJ Flange |
1/2 | 60.5 | 4 | 15.7 | 1/2 | 50.8 | 57.2 | – |
3/4 | 69.9 | 4 | 15.7 | 1/2 | 50.8 | 63.5 | – |
1 | 79.2 | 4 | 15.7 | 1/2 | 57.2 | 63.5 | 76.2 |
1¼ | 88.9 | 4 | 15.7 | 1/2 | 57.2 | 69.9 | 82.6 |
1½ | 98.6 | 4 | 15.7 | 1/2 | 63.5 | 69.9 | 82.6 |
2 | 120.7 | 4 | 19.1 | 5/8 | 69.9 | 82.6 | 95.3 |
2½ | 139.7 | 4 | 19.1 | 5/8 | 76.2 | 88.9 | 101.6 |
3 | 152.4 | 4 | 19.1 | 5/8 | 76.2 | 88.9 | 101.6 |
3½ | 177.8 | 8 | 19.1 | 5/8 | 76.2 | 88.9 | 101.6 |
4 | 190.5 | 8 | 19.1 | 5/8 | 76.2 | 88.9 | 101.6 |
5 | 215.9 | 8 | 22.4 | 3/4 | 82.6 | 95.3 | 108.0 |
6 | 241.3 | 8 | 22.4 | 3/4 | 82.6 | 101.6 | 114.3 |
8 | 298.5 | 8 | 22.4 | 3/4 | 88.9 | 108.0 | 120.7 |
10 | 362.0 | 12 | 25.4 | 7/8 | 101.6 | 114.3 | 127.0 |
12 | 431.8 | 12 | 25.4 | 7/8 | 101.6 | 120.7 | 133.4 |
14 | 476.3 | 12 | 28.4 | 1 | 114.3 | 133.4 | 146.1 |
16 | 539.8 | 16 | 28.4 | 1 | 114.3 | 133.4 | 146.1 |
18 | 577.9 | 16 | 31.8 | 11/8 | 127.0 | 146.1 | 158.8 |
20 | 635.0 | 20 | 31.8 | 11/8 | 139.7 | 158.8 | 171.5 |
24 | 749.3 | 20 | 35.1 | 1¼ | 152.4 | 171.5 | 184.2 |
WN CLASS 300 (IN MM)
Weld neck flange dimensions class 300 (ASME B16.5) in millimeters
Size inch |
D mm |
X mm |
G mm |
t mm |
B1 mm |
T1 mm |
A mm |
---|---|---|---|---|---|---|---|
1/2 | 95 | 38.1 | 35.1 | 14.2 | 15.7 | 52.3 | 21.3 |
3/4 | 117 | 47.8 | 42.9 | 15.7 | 20.8 | 57.2 | 26.7 |
1 | 124 | 53.8 | 50.8 | 17.5 | 26.7 | 62.0 | 33.5 |
1¼ | 133 | 63.5 | 63.5 | 19.1 | 35.1 | 65.0 | 42.2 |
1½ | 155 | 69.9 | 73.2 | 20.6 | 40.9 | 68.3 | 48.3 |
2 | 165 | 84.1 | 91.9 | 22.4 | 52.6 | 69.9 | 60.5 |
2½ | 191 | 100.1 | 104.6 | 25.4 | 62.7 | 76.2 | 73.2 |
3 | 210 | 117.3 | 127.0 | 28.4 | 78.0 | 79.2 | 88.9 |
3½ | 229 | 133.4 | 139.7 | 30.2 | 90.2 | 81.0 | 101.6 |
4 | 254 | 146.1 | 157.2 | 31.8 | 102.4 | 85.9 | 114.3 |
5 | 279 | 177.8 | 185.7 | 35.1 | 128.3 | 98.6 | 141.2 |
6 | 318 | 206.2 | 215.9 | 36.6 | 154.2 | 98.6 | 168.4 |
8 | 381 | 260.4 | 269.7 | 41.1 | 202.7 | 111.3 | 219.2 |
10 | 445 | 320.5 | 323.9 | 47.8 | 254.5 | 117.3 | 273.1 |
12 | 521 | 374.7 | 381.0 | 50.8 | 304.8 | 130.0 | 323.9 |
14 | 584 | 425.5 | 412.8 | 63.8 | 336.6 | 142.7 | 355.6 |
16 | 648 | 482.6 | 469.9 | 57.2 | 387.4 | 146.1 | 406.4 |
18 | 711 | 533.4 | 533.4 | 60.5 | 438.2 | 158.8 | 457.2 |
20 | 775 | 587.2 | 584.2 | 63.5 | 489.0 | 162.1 | 508.0 |
24 | 914 | 701.5 | 692.2 | 69.9 | 590.6 | 168.1 | 609.6 |
Size | Bolt Drilling | Bolting Requirements | |||||
---|---|---|---|---|---|---|---|
inch | Bolt circle Diameter mm |
Holes # | Holes Dia. mm | Bolt Dia. inch. | Length FF Flange |
Length RF Flange |
Length RTJ Flange |
1/2 | 66.5 | 4 | 15.7 | 1/2 | 57.2 | 63.5 | 76.2 |
3/4 | 82.6 | 4 | 19.1 | 5/8 | 63.5 | 76.2 | 88.9 |
1 | 88.9 | 4 | 19.1 | 5/8 | 63.5 | 76.2 | 88.9 |
1¼ | 98.6 | 4 | 19.1 | 5/8 | 69.9 | 82.6 | 95.3 |
1½ | 114.3 | 4 | 22.4 | 3/4 | 76.2 | 88.9 | 101.6 |
2 | 127.0 | 8 | 19.1 | 5/8 | 76.2 | 88.9 | 101.6 |
2½ | 149.4 | 8 | 22.4 | 3/4 | 82.6 | 101.6 | 114.3 |
3 | 168.1 | 8 | 22.4 | 3/4 | 88.9 | 108.0 | 120.7 |
3½ | 184.2 | 8 | 22.4 | 3/4 | 95.3 | 108.0 | 127.0 |
4 | 200.2 | 8 | 22.4 | 3/4 | 95.3 | 114.3 | 127.0 |
5 | 235.0 | 8 | 22.4 | 3/4 | 108.0 | 120.7 | 133.4 |
6 | 269.7 | 12 | 22.4 | 3/4 | 108.0 | 120.7 | 139.7 |
8 | 330.2 | 12 | 25.4 | 7/8 | 120.7 | 139.7 | 152.4 |
10 | 387.4 | 16 | 28.4 | 1 | 139.7 | 158.8 | 171.5 |
12 | 450.9 | 16 | 31.8 | 11/8 | 146.1 | 171.5 | 184.2 |
14 | 514.4 | 20 | 31.8 | 11/8 | 158.8 | 177.8 | 190.5 |
16 | 571.5 | 20 | 35.1 | 1¼ | 165.1 | 190.5 | 203.2 |
18 | 628.7 | 24 | 35.1 | 1¼ | 171.5 | 196.9 | 209.6 |
20 | 685.8 | 24 | 35.1 | 1¼ | 184.2 | 203.2 | 222.3 |
24 | 812.8 | 24 | 41.1 | 1½ | 203.2 | 228.6 | 254.0 |
WN CLASS 600 (IN MM)
Weld neck flange dimensions class 300 (ASME B16.5) in millimeters
Size inch |
D mm |
X mm |
G mm |
t mm |
B1 mm |
T1 mm |
A mm |
---|---|---|---|---|---|---|---|
1/2 | 95 | 38.1 | 35.1 | 14.2 | B36.10/.19 | 52.3 | 21.3 |
3/4 | 117 | 47.8 | 42.9 | 15.7 | B36.10/.19 | 57.2 | 26.7 |
1 | 124 | 53.8 | 50.8 | 17.5 | B36.10/.19 | 62.0 | 33.5 |
1¼ | 133 | 63.5 | 63.5 | 20.6 | B36.10/.19 | 66.5 | 42.2 |
1½ | 155 | 69.9 | 73.2 | 22.4 | B36.10/.19 | 69.9 | 48.3 |
2 | 165 | 84.1 | 91.9 | 25.4 | B36.10/.19 | 73.2 | 60.5 |
2½ | 191 | 100.1 | 104.6 | 28.4 | B36.10/.19 | 79.2 | 73.2 |
3 | 210 | 117.3 | 127.0 | 31.8 | B36.10/.19 | 82.6 | 88.9 |
3½ | 229 | 133.4 | 139.7 | 35.1 | B36.10/.19 | 85.9 | 101.6 |
4 | 273 | 152.4 | 157.2 | 38.1 | B36.10/.19 | 101.6 | 114.3 |
5 | 330 | 189.0 | 185.7 | 44.5 | B36.10/.19 | 114.3 | 141.2 |
6 | 356 | 222.3 | 215.9 | 47.8 | B36.10/.19 | 117.3 | 168.4 |
8 | 419 | 273.1 | 269.7 | 55.6 | B36.10/.19 | 133.4 | 219.2 |
10 | 508 | 342.9 | 323.9 | 63.5 | B36.10/.19 | 152.4 | 273.1 |
12 | 559 | 400.1 | 381.0 | 66.5 | B36.10/.19 | 155.4 | 323.9 |
14 | 603 | 431.8 | 412.8 | 69.9 | B36.10/.19 | 165.1 | 355.6 |
16 | 686 | 495.3 | 469.9 | 76.2 | B36.10/.19 | 177.8 | 406.4 |
18 | 743 | 546.1 | 533.4 | 82.6 | B36.10/.19 | 184.2 | 457.2 |
20 | 813 | 609.6 | 584.2 | 88.9 | B36.10/.19 | 190.5 | 508.0 |
24 | 940 | 717.6 | 692.2 | 101.6 | B36.10/.19 | 203.2 | 609.6 |
Size | Bolt Drilling | Bolting Requirements | |||||
---|---|---|---|---|---|---|---|
inch | Bolt circle Diameter mm |
Holes # | Holes Dia. mm | Bolt Dia. inch. | Length FF Flange |
Length RF Flange |
Length RTJ Flange |
1/2 | 66.5 | 4 | 15.7 | 1/2 | 76.2 | 69.9 | 76.2 |
3/4 | 82.6 | 4 | 19.1 | 5/8 | 88.9 | 82.6 | 88.9 |
1 | 88.9 | 4 | 19.1 | 5/8 | 88.9 | 82.6 | 88.9 |
1¼ | 98.6 | 4 | 19.1 | 5/8 | 95.3 | 88.9 | 95.3 |
1½ | 114.3 | 4 | 22.4 | 3/4 | 108.0 | 101.6 | 108.0 |
2 | 127.0 | 8 | 19.1 | 5/8 | 108.0 | 101.6 | 108.0 |
2½ | 149.4 | 8 | 22.4 | 3/4 | 120.7 | 114.3 | 120.7 |
3 | 168.1 | 8 | 22.4 | 3/4 | 127.0 | 120.7 | 127.0 |
3½ | 184.2 | 8 | 25.4 | 7/8 | 139.7 | 133.4 | 139.7 |
4 | 215.9 | 8 | 25.4 | 7/8 | 146.1 | 139.7 | 146.1 |
5 | 266.7 | 8 | 28.4 | 1 | 165.1 | 158.8 | 165.1 |
6 | 292.1 | 12 | 28.4 | 1 | 171.5 | 165.1 | 171.5 |
8 | 349.3 | 12 | 31.8 | 11/8 | 190.5 | 184.2 | 196.9 |
10 | 431.8 | 16 | 35.1 | 1¼ | 215.9 | 209.6 | 215.9 |
12 | 489.0 | 20 | 35.1 | 1¼ | 222.3 | 215.9 | 222.3 |
14 | 527.1 | 20 | 38.1 | 13/8 | 235.0 | 228.6 | 235.0 |
16 | 603.3 | 20 | 41.1 | 1½ | 254.0 | 247.7 | 254.0 |
18 | 654.1 | 20 | 44.5 | 15/8 | 273.1 | 266.7 | 273.1 |
20 | 723.9 | 24 | 44.5 | 15/8 | 285.8 | 279.4 | 292.1 |
24 | 838.2 | 24 | 50.8 | 17/8 | 330.2 | 323.9 | 336.6 |
WN CLASS 900 (IN MM)
Weld neck flange dimensions class 300 (ASME B16.5) in millimeters
Size inch |
D mm |
X mm |
G mm |
t mm |
B1 mm |
T1 mm |
A mm |
---|---|---|---|---|---|---|---|
1/2 | 121 | 38.1 | 35.1 | 22.4 | B36.10/.19 | 60.5 | 21.3 |
3/4 | 130 | 44.5 | 42.9 | 25.4 | B36.10/.19 | 69.9 | 26.7 |
1 | 149 | 52.3 | 50.8 | 28.4 | B36.10/.19 | 73.2 | 33.5 |
1¼ | 159 | 63.5 | 63.5 | 28.4 | B36.10/.19 | 73.2 | 42.2 |
1½ | 178 | 69.9 | 73.2 | 31.8 | B36.10/.19 | 82.6 | 48.3 |
2 | 216 | 104.6 | 91.9 | 38.1 | B36.10/.19 | 101.6 | 60.5 |
2½ | 244 | 124.0 | 104.6 | 41.1 | B36.10/.19 | 104.6 | 73.2 |
3 | 241 | 127.0 | 127.0 | 38.1 | B36.10/.19 | 101.6 | 88.9 |
4 | 292 | 158.8 | 157.2 | 44.5 | B36.10/.19 | 114.3 | 114.3 |
5 | 349 | 190.5 | 185.7 | 50.8 | B36.10/.19 | 127.0 | 141.2 |
6 | 381 | 235.0 | 215.9 | 55.6 | B36.10/.19 | 139.7 | 168.4 |
8 | 470 | 298.5 | 269.7 | 63.5 | B36.10/.19 | 162.1 | 219.2 |
10 | 546 | 368.3 | 323.9 | 69.9 | B36.10/.19 | 184.2 | 273.1 |
12 | 610 | 419.1 | 381.0 | 79.2 | B36.10/.19 | 200.2 | 323.9 |
14 | 641 | 450.9 | 412.8 | 85.9 | B36.10/.19 | 212.9 | 355.6 |
16 | 705 | 508.0 | 469.9 | 88.9 | B36.10/.19 | 215.9 | 406.4 |
18 | 787 | 565.2 | 533.4 | 101.6 | B36.10/.19 | 228.6 | 457.2 |
20 | 857 | 622.3 | 584.2 | 108.0 | B36.10/.19 | 247.7 | 508.0 |
24 | 1041 | 749.3 | 692.2 | 139.7 | B36.10/.19 | 292.1 | 609.6 |
Size | Bolt Drilling | Bolting Requirements | |||||
---|---|---|---|---|---|---|---|
inch | Bolt circle Diameter mm |
Holes # | Holes Dia. mm | Bolt Dia. inch. | Length FF Flange |
Length RF Flange |
Length RTJ Flange |
1/2 | 82.6 | 4 | 22.4 | 3/4 | 108.0 | 101.6 | 108.0 |
3/4 | 88.9 | 4 | 22.4 | 3/4 | 114.3 | 108.0 | 114.3 |
1 | 101.6 | 4 | 25.4 | 7/8 | 127.0 | 120.7 | 127.0 |
1¼ | 111.3 | 4 | 25.4 | 7/8 | 127.0 | 120.7 | 127.0 |
1½ | 124.0 | 4 | 28.4 | 1 | 139.7 | 133.4 | 139.7 |
2 | 165.1 | 8 | 25.4 | 7/8 | 146.1 | 139.7 | 146.1 |
2½ | 190.5 | 8 | 28.4 | 1 | 158.8 | 152.4 | 158.8 |
3 | 190.5 | 8 | 25.4 | 7/8 | 146.1 | 139.7 | 146.1 |
4 | 235.0 | 8 | 31.8 | 11/8 | 171.5 | 165.1 | 171.5 |
5 | 279.4 | 8 | 35.1 | 1¼ | 190.5 | 184.2 | 190.5 |
6 | 317.5 | 12 | 31.8 | 11/8 | 190.5 | 184.2 | 196.9 |
8 | 393.7 | 12 | 38.1 | 13/8 | 222.3 | 215.9 | 222.3 |
10 | 469.9 | 16 | 38.1 | 13/8 | 235.0 | 228.6 | 235.0 |
12 | 533.4 | 20 | 38.1 | 13/8 | 254.0 | 247.7 | 254.0 |
14 | 558.8 | 20 | 41.1 | 1½ | 273.1 | 266.7 | 292.1 |
16 | 616.0 | 20 | 44.5 | 15/8 | 285.8 | 279.4 | 298.5 |
18 | 685.8 | 20 | 50.8 | 17/8 | 323.9 | 317.5 | 333.6 |
20 | 749.3 | 20 | 53.8 | 2 | 349.3 | 342.9 | 362.0 |
24 | 901.7 | 20 | 66.5 | 1½ | 438.2 | 431.8 | 457.2 |
DIMENSIONAL TOLERANCE WELDING NECK FLANGE
Certificate | Plate thickness in mm | Width in mm | Length in mm | |
Outside Diameter | When O is 24″ or less. When O is over 24″. | ±0.06″ ±0.12″ | ±1.6 mm | ±3.2 mm |
Diameter of Contact Face | 0.06″ (1.6 mm) raised face. 0.25″ (6.4 mm) raised face. | ±0.03″ ±0.02″ | ±0.8 mm | ±0.5mm |
Diameter of Hub at Point of Welding | NPS 5 and smaller. NPS 6 and larger. | +0.09″, -0.03″ +0.16″, -0.03″ | +2.4 mm, -0.8mm | +4.0 mm, -0.8 mm |
Inside Diameter | NPS 10, 12, 18, 20 and larger. | +0.03″ +0.06″ +0.12″, -0.06″ | +0.8 mm +1.6 mm | +3.2 mm, -1.6 mm |
Diameter of Hub at Base | Hub Base is 24″or less. Hub Base is over 24″. | +0.06″ +0.12″ | +1.6 mm | +3.2 mm |
Thickness | NPS 18 and smaller. NPS 20 and larger. | +0.12″ +0.19″ | +3.2 mm | +4.8 mm |
Drilling and Facings | Bolt circle diameter Bolt Hole Spacing | ±0.06″ ±0.03″ | ±1.6 mm | ±0.8 mm |
Eccentricity of Bolt Circle and Facing | NPS 2 1/2 and smaller. NPS 3 and larger. | ±0.03″ ±0.06″ | ±0.8 mm | ±1.6 mm |
Length Through Hub | NPS 10 and smaller. NPS 12 and larger. | ±0.06″ ±0.12″ | ±1.6 mm | ±3.2 mm |