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ToggleThe article shows the ASME B16.5 dimensions of Lap-Joint Flanges Classes from 150 to 2500 (NPS, ID, OD, Thickness, and bolting details, tolerances) – both in inches and millimeters.
ASME LAP-JOINT FLANGE DIMENSIONS & WEIGHTS
The article shows the ASME B16.5 dimensions and weights for lap-joint flanges.
LAP-JOINT FLANGES SIZES in INCHES
LAP-JOINT CLASS 150
Lap joint flange dimensions class 150 in inches (ASME B16.5)
FLANGE NPS | Inside Diameter | Outside Diameter | Bolt Circle (BC) | H | T1 | T2 | RA | Bolt Hole (B) | No. of Bolt Holes |
---|---|---|---|---|---|---|---|---|---|
1/2″ | 0.88″ | 3.50″ | 2.38″ | 1.19″ | .44″ | .62″ | .12″ | .62″ | 4 |
3/4″ | 1.09″ | 3.88″ | 2.75″ | 1.50″ | .50″ | .62″ | .12″ | .62″ | 4 |
1″ | 1.36″ | 4.25″ | 3.12″ | 1.94″ | .56″ | .69″ | .12″ | .62″ | 4 |
1-1/4″ | 1.70″ | 4.62″ | 3.50″ | 2.31″ | .62″ | .81″ | .19″ | .62″ | 4 |
1-1/2″ | 1.97″ | 5.00″ | 3.88″ | 2.56″ | .69″ | .88″ | .25″ | .62″ | 4 |
2″ | 2.44″ | 6.00″ | 4.75″ | 3.06″ | .75″ | 1.00″ | .31″ | .75″ | 4 |
2-1/2″ | 2.94″ | 7.00″ | 5.50″ | 3.56″ | .88″ | 1.12″ | .31″ | .75″ | 4 |
3″ | 3.57″ | 7.50″ | 6.00″ | 4.25″ | .94″ | 1.19″ | .38″ | .75″ | 4 |
3-1/2″ | 4.07″ | 8.50″ | 7.00″ | 4.81″ | .94″ | 1.25″ | .38″ | .75″ | 8 |
4″ | 4.57″ | 9.00″ | 7.50″ | 5.31″ | .94″ | 1.31″ | .44″ | .75″ | 8 |
5″ | 5.66″ | 10.00″ | 8.50″ | 6.44″ | .94″ | 1.44″ | .44″ | .88″ | 8 |
6″ | 6.72″ | 11.00″ | 9.50″ | 7.56″ | 1.00″ | 1.56″ | .50″ | .88″ | 8 |
8″ | 8.72″ | 13.50″ | 11.75″ | 9.69″ | 1.12″ | 1.75″ | .50″ | .88″ | 8 |
10″ | 10.88″ | 16.00″ | 14.25″ | 12.00″ | 1.19″ | 1.94″ | .50″ | 1.00″ | 12 |
12″ | 12.88″ | 19.00″ | 17.00″ | 14.38″ | 1.25″ | 2.19″ | .50″ | 1.00″ | 12 |
14″ | 14.14″ | 21.00″ | 18.75″ | 15.75″ | 1.38″ | 3.12″ | .50″ | 1.12″ | 12 |
16″ | 16.16″ | 23.50″ | 21.25″ | 18.00″ | 1.44″ | 3.44″ | .50″ | 1.12″ | 16 |
18″ | 18.18″ | 25.00″ | 22.75″ | 19.88″ | 1.56″ | 3.81″ | .50″ | 1.25″ | 16 |
20″ | 20.20″ | 27.50″ | 25.00″ | 22.00″ | 1.69″ | 4.06″ | .50″ | 1.25″ | 20 |
22″ | 22.22″ | 29.50″ | 27.25″ | 24.25″ | 1.81″ | 4.25″ | .50″ | 1.38″ | 20 |
24″ | 24.25″ | 32.00″ | 29.50″ | 26.12″ | 1.88″ | 4.38″ | .50″ | 1.38″ | 20 |
LAP-JOINT CLASS 300
Lap joint flange dimensions class 300 in inches (ASME B16.5)
FLANGE NPS | Inside Diameter | Outside Diameter | Bolt Circle (BC) | H | T1 | T2 | RA | Bolt Hole (B) | No. of Bolt Holes |
---|---|---|---|---|---|---|---|---|---|
1/2″ | 0.90″ | 3.75″ | 2.62″ | 1.50″ | 0.56″ | 0.88″ | .12″ | 0.62″ | 4 |
3/4″ | 1.11″ | 4.62″ | 3.25″ | 1.88″ | 0.62″ | 1.00″ | .12″ | 0.75″ | 4 |
1″ | 1.38″ | 4.88″ | 3.50″ | 2.12″ | 0.69″ | 1.06″ | .12″ | 0.75″ | 4 |
1-1/4″ | 1.72″ | 5.25″ | 3.88″ | 2.50″ | 0.75″ | 1.06″ | .19″ | 0.75″ | 4 |
1-1/2″ | 1.97″ | 6.12″ | 4.50″ | 2.75″ | 0.81″ | 1.19″ | .25″ | 0.88″ | 4 |
2″ | 2.46″ | 6.50″ | 5.00″ | 3.31″ | 0.88″ | 1.31″ | .31″ | 0.75″ | 8 |
2-1/2″ | 2.97″ | 7.50″ | 5.88″ | 3.94″ | 1.00″ | 1.50″ | .31″ | 0.88″ | 8 |
3″ | 3.60″ | 8.25″ | 6.62″ | 4.62″ | 1.12″ | 1.69″ | .38″ | 0.88″ | 8 |
3-1/2″ | 4.10″ | 9.00″ | 7.25″ | 5.25″ | 1.19″ | 1.75″ | .38″ | 0.88″ | 8 |
4″ | 4.60″ | 10.00″ | 7.88″ | 5.75″ | 1.25″ | 1.88″ | .44″ | 0.88″ | 8 |
5″ | 5.69″ | 11.00″ | 9.25″ | 7.00″ | 1.38″ | 2.00″ | .44″ | 0.88″ | 8 |
6″ | 6.75″ | 12.50″ | 10.62″ | 8.12″ | 1.44″ | 2.06″ | .50″ | 0.88″ | 12 |
8″ | 8.75″ | 15.00″ | 13.00″ | 10.25″ | 1.62″ | 2.44″ | .50″ | 1.00″ | 12 |
10″ | 10.92″ | 17.50″ | 15.25″ | 12.62″ | 1.88″ | 3.75″ | .50″ | 1.12″ | 16 |
12″ | 12.92″ | 20.50″ | 17.75″ | 14.75″ | 2.00″ | 4.00″ | .50″ | 1.25″ | 16 |
14″ | 14.18″ | 23.00″ | 20.25″ | 16.75″ | 2.12″ | 4.38″ | .50″ | 1.25″ | 20 |
16″ | 16.19″ | 25.50″ | 22.50″ | 19.00″ | 2.25″ | 4.75″ | .50″ | 1.38″ | 20 |
18″ | 18.20″ | 28.00″ | 24.75″ | 21.00″ | 2.38″ | 5.12″ | .50″ | 1.38″ | 24 |
20″ | 20.25″ | 30.50″ | 27.00″ | 23.12″ | 2.50″ | 5.50″ | .50″ | 1.38″ | 24 |
22″ | 22.25″ | 33.00″ | 29.25″ | 25.25″ | 2.63″ | 5.75″ | .50″ | 1.63″ | 24 |
24″ | 24.25″ | 36.00″ | 32.00″ | 27.62″ | 2.75″ | 6.00″ | .50″ | 1.62″ | 24 |
LAP-JOINT CLASS 400
Lap joint flange dimensions class 400 in inches (ASME B16.5)
FLANGE NPS | Inside Diameter | Outside Diameter | Bolt Circle (BC) | H | T1 | T2 | RA | Bolt Hole (B) | No. of Bolt Holes |
---|---|---|---|---|---|---|---|---|---|
1/2″ | 0.90″ | 3.75″ | 2.62″ | 1.50″ | 0.56″ | 0.88″ | .12″ | 0.62″ | 4 |
3/4″ | 1.11″ | 4.62″ | 3.25″ | 1.88″ | 0.62″ | 1.00″ | .12″ | 0.75″ | 4 |
1″ | 1.38″ | 4.88″ | 3.50″ | 2.12″ | 0.69″ | 1.06″ | .12″ | 0.75″ | 4 |
1-1/4″ | 1.72″ | 5.25″ | 3.88″ | 2.50″ | 0.81″ | 1.12″ | .19″ | 0.75″ | 4 |
1-1/2″ | 1.97″ | 6.12″ | 4.50″ | 2.75″ | 0.88″ | 1.25″ | .25″ | 0.88″ | 4 |
2″ | 2.46″ | 6.50″ | 5.00″ | 3.31″ | 1.00″ | 1.44″ | .31″ | 0.75″ | 8 |
2-1/2″ | 2.97″ | 7.50″ | 5.88″ | 3.94″ | 1.12″ | 1.62″ | .31″ | 0.88″ | 8 |
3″ | 3.60″ | 8.25″ | 6.62″ | 4.62″ | 1.25″ | 1.81″ | .38″ | 0.88″ | 8 |
3-1/2″ | 4.10″ | 9.00″ | 7.25″ | 5.25″ | 1.38″ | 1.94″ | .38″ | 1.00″ | 8 |
4″ | 4.60″ | 10.00″ | 7.88″ | 5.75″ | 1.38″ | 2.00″ | .44″ | 1.00″ | 8 |
5″ | 5.69″ | 11.00″ | 9.25″ | 7.00″ | 1.50″ | 2.12″ | .44″ | 1.00″ | 8 |
6″ | 6.75″ | 12.50″ | 10.62″ | 8.12″ | 1.62″ | 2.25″ | .50″ | 1.00″ | 12 |
8″ | 8.75″ | 15.00″ | 13.00″ | 10.25″ | 1.88″ | 2.69″ | .50″ | 1.12″ | 12 |
10″ | 10.92″ | 17.50″ | 15.25″ | 12.62″ | 2.12″ | 4.00″ | .50″ | 1.25″ | 16 |
12″ | 12.92″ | 20.50″ | 17.75″ | 14.75″ | 2.25″ | 4.25″ | .50″ | 1.38″ | 16 |
14″ | 14.18″ | 23.00″ | 20.25″ | 16.75″ | 2.38″ | 4.62″ | .50″ | 1.38″ | 20 |
16″ | 16.19″ | 25.50″ | 22.50″ | 19.00″ | 2.50″ | 5.00″ | .50″ | 1.50″ | 20 |
18″ | 18.20″ | 28.00″ | 24.75″ | 21.00″ | 2.62″ | 5.38″ | .50″ | 1.50″ | 24 |
20″ | 20.25″ | 30.50″ | 27.00″ | 23.12″ | 2.75″ | 5.75″ | .50″ | 1.62″ | 24 |
22″ | 22.25″ | 33.00″ | 29.25″ | 25.25″ | 2.88″ | 6.00″ | .50″ | 1.75″ | 24 |
24″ | 24.25″ | 36.00″ | 32.00″ | 27.62″ | 3.00″ | 6.25″ | .50″ | 1.88″ | 24 |
LAP-JOINT CLASS 600
Lap joint flange dimensions class 600 in inches (ASME B16.5)
FLANGE NPS | Inside Diameter | Outside Diameter | Bolt Circle (BC) | H | T1 | T2 | RA | Bolt Hole (B) | No. of Bolt Holes |
---|---|---|---|---|---|---|---|---|---|
1/2″ | 0.90″ | 3.75″ | 2.62″ | 1.50″ | 0.56″ | 0.88″ | .12″ | 0.62″ | 4 |
3/4″ | 1.11″ | 4.62″ | 3.25″ | 1.88″ | 0.62″ | 1.00″ | .12″ | 0.75″ | 4 |
1″ | 1.38″ | 4.88″ | 3.50″ | 2.12″ | 0.69″ | 1.06″ | .12″ | 0.75″ | 4 |
1-1/4″ | 1.72″ | 5.25″ | 3.88″ | 2.50″ | 0.81″ | 1.12″ | .19″ | 0.75″ | 4 |
1-1/2″ | 1.97″ | 6.12″ | 4.50″ | 2.75″ | 0.88″ | 1.25″ | .25″ | 0.88″ | 4 |
2″ | 2.46″ | 6.50″ | 5.00″ | 3.31″ | 1.00″ | 1.44″ | .31″ | 0.75″ | 8 |
2-1/2″ | 2.97″ | 7.50″ | 5.88″ | 3.94″ | 1.12″ | 1.62″ | .31″ | 0.88″ | 8 |
3″ | 3.60″ | 8.25″ | 6.62″ | 4.62″ | 1.25″ | 1.81″ | .38″ | 0.88″ | 8 |
3-1/2″ | 4.10″ | 9.00″ | 7.25″ | 5.25″ | 1.38″ | 1.94″ | .38″ | 1.00″ | 8 |
4″ | 4.60″ | 10.75″ | 8.50″ | 6.00″ | 1.5″ | 2.12″ | .44″ | 1.00″ | 8 |
5″ | 5.69″ | 13.00″ | 10.50″ | 7.44″ | 1.75″ | 2.38″ | .44″ | 1.12″ | 8 |
6″ | 6.75″ | 14.00″ | 11.50″ | 8.75″ | 1.88″ | 2.62″ | .50″ | 1.12″ | 12 |
8″ | 8.75″ | 16.50″ | 13.75″ | 10.75″ | 2.19″ | 3.00″ | .50″ | 1.25″ | 12 |
10″ | 10.92″ | 20.00″ | 17.00″ | 13.5″ | 2.50″ | 4.38″ | .50″ | 1.38″ | 16 |
12″ | 12.92″ | 22.00″ | 19.25″ | 15.75″ | 2.62″ | 4.62″ | .50″ | 1.38″ | 20 |
14″ | 14.18″ | 23.75″ | 20.75″ | 17.00″ | 2.75″ | 5.00″ | .50″ | 1.50″ | 20 |
16″ | 16.19″ | 27.00″ | 23.75″ | 19.50″ | 3.00″ | 5.50″ | .50″ | 1.62″ | 20 |
18″ | 18.20″ | 29.25″ | 25.75″ | 21.50″ | 3.25″ | 6.00″ | .50″ | 1.75″ | 20 |
20″ | 20.25″ | 32.00″ | 28.50″ | 24.00″ | 3.50″ | 6.50″ | .50″ | 1.75″ | 24 |
22″ | 22.25″ | 34.25″ | 30.63″ | 26.25″ | 3.75″ | 6.88″ | .50″ | 1.75″ | 24 |
24″ | 24.25″ | 37.00″ | 33.00″ | 28.25″ | 4.00″ | 7.25″ | .50″ | 2.00″ | 24 |
LAP-JOINT CLASS 900
Lap joint flange dimensions class 900 in inches (ASME B16.5)
FLANGE NPS | Inside Diameter | Outside Diameter | Bolt Circle (BC) | H | T1 | T2 | RA | Bolt Hole (B) | No. of Bolt Holes |
---|---|---|---|---|---|---|---|---|---|
3″ | 3.60″ | 9.50″ | 7.50″ | 5.00″ | 1.50″ | 2.13″ | .38″ | 1.00″ | 8 |
4″ | 4.60″ | 11.50″ | 9.25″ | 6.25″ | 1.75″ | 2.75″ | .44″ | 1.25″ | 8 |
5″ | 5.69″ | 13.75″ | 11.00″ | 7.50″ | 3.00″ | 3.13″ | .44″ | 1.38″ | 8 |
6″ | 6.75″ | 15.00″ | 12.50″ | 9.25″ | 2.19″ | 3.38″ | .50″ | 1.25″ | 12 |
8″ | 8.75″ | 18.50″ | 15.50″ | 11.75″ | 2.50″ | 4.50″ | .50″ | 1.50″ | 12 |
10″ | 10.92″ | 21.50″ | 18.50″ | 14.50″ | 2.75″ | 5.00″ | .50″ | 1.50″ | 16 |
12″ | 12.92″ | 24.00″ | 21.00″ | 16.50″ | 3.13″ | 5.63″ | .50″ | 1.50″ | 20 |
14″ | 14.18″ | 25.25″ | 22.00″ | 17.75″ | 3.38″ | 6.13″ | .50″ | 1.63″ | 20 |
16″ | 16.19″ | 27.75″ | 24.25″ | 20.00″ | 3.50″ | 6.50″ | .50″ | 1.75″ | 20 |
18″ | 18.20″ | 31.00″ | 27.00″ | 22.25″ | 4.00″ | 7.50″ | .50″ | 2.00″ | 20 |
20″ | 20.25″ | 33.75″ | 29.50″ | 24.50″ | 4.25″ | 8.25″ | .50″ | 2.13″ | 20 |
24″ | 24.25″ | 41.00″ | 35.50″ | 29.50″ | 5.50″ | 10.50″ | .50″ | 2.63″ | 20 |
LAP-JOINT CLASS 1500
Lap joint flange dimensions class 1500 in inches (ASME B16.5)
FLANGE NPS | Inside Diameter | Outside Diameter | Bolt Circle (BC) | Raised Face (R) | Raised Face (RF) | H | Raised Face Thickness (T) | T1 | Flat Face Thickness (T2) | Bolt Hole (B) | No. of Bolt Holes |
---|---|---|---|---|---|---|---|---|---|---|---|
1/2″ | 0.88″ | 4.75″ | 3.25″ | 1.38″ | .250″ | 1.50″ | 1.50″ | 0.88″ | 1.25″ | 0.88″ | 4 |
3/4″ | 1.09″ | 5.13″ | 3.50″ | 1.69″ | .250″ | 1.75″ | 1.63″ | 1.00″ | 1.38″ | 0.88″ | 4 |
1″ | 1.36″ | 5.88″ | 4.00″ | 2.00″ | .250″ | 2.06″ | 1.88″ | 1.13″ | 1.63″ | 1.00″ | 4 |
1-1/4″ | 1.70″ | 6.25″ | 4.38″ | 2.50″ | .250″ | 2.50″ | 1.88″ | 1.13″ | 1.63″ | 1.00″ | 4 |
1-1/2″ | 1.95″ | 7.00″ | 4.88″ | 2.88″ | .250″ | 2.75″ | 2.00″ | 1.25″ | 1.75″ | 1.13″ | 4 |
2″ | 2.44″ | 8.50″ | 6.50″ | 3.63″ | .250″ | 4.13″ | 2.50″ | 1.50″ | 2.25″ | 1.00″ | 8 |
2-1/2″ | 2.94″ | 9.63″ | 7.50″ | 4.13″ | .250″ | 4.88″ | 2.75″ | 1.63″ | 2.50″ | 1.13″ | 8 |
3″ ** | 3.57″ | 10.50″ | 8.00″ | 5.00″ | .250″ | 5.25″ | 3.13″ | 1.88″ | 2.88″ | 1.25″ | 8 |
4″ ** | 4.57″ | 12.25″ | 9.50″ | 6.19″ | .250″ | 6.38″ | 3.81″ | 2.13″ | 3.56″ | 1.38″ | 8 |
5″ ** | 5.66″ | 14.75″ | 11.50″ | 7.31″ | .250″ | 7.75″ | 4.38″ | 2.88″ | 4.13″ | 1.63″ | 8 |
6″ ** | 6.72″ | 15.50″ | 12.50″ | 8.50″ | .250″ | 9.00″ | 4.94″ | 3.25″ | 4.69″ | 1.50″ | 12 |
8″ ** | 8.72″ | 19.00″ | 15.50″ | 10.63″ | .250″ | 11.50″ | 5.88″ | 3.63″ | 5.63″ | 1.75″ | 12 |
10″ ** | 10.88″ | 23.00″ | 19.00″ | 12.75″ | .250″ | 14.50″ | 6.50″ | 4.25″ | 6.25″ | 2.00″ | 12 |
12″ ** | 12.88″ | 26.50″ | 22.50″ | 15.00″ | .250″ | 17.75″ | 7.38″ | 4.88″ | 7.13″ | 2.13″ | 16 |
LAP-JOINT CLASS 2500
Lap joint flange dimensions class 2500 in inches (ASME B16.5)
FLANGE NPS | Inside Diameter | Outside Diameter | Bolt Circle (BC) | H | T1 | T2 | RA | Bolt Hole (B) | No. of Bolt Holes |
---|---|---|---|---|---|---|---|---|---|
1/2″ | 0.90″ | 5.25″ | 3.50″ | 1.69″ | 1.19″ | 1.56″ | .12″ | 0.88″ | 4 |
3/4″ | 1.11″ | 5.50″ | 3.75″ | 2.00″ | 1.25″ | 1.69″ | .12″ | 0.88″ | 4 |
1″ | 1.38″ | 6.25″ | 4.25″ | 2.25″ | 1.38″ | 1.88″ | .12″ | 1.00″ | 4 |
1-1/4″ | 1.72″ | 7.25″ | 5.13″ | 2.88″ | 1.50″ | 2.06″ | .19″ | 1.13″ | 4 |
1-1/2″ | 1.97″ | 8.00″ | 5.75″ | 3.13″ | 1.75″ | 2.38″ | .25″ | 1.25″ | 4 |
2″ | 2.46″ | 9.25″ | 6.75″ | 3.75″ | 2.00″ | 2.75″ | .31″ | 1.13″ | 8 |
2-1/2″ | 2.97″ | 10.50″ | 7.75″ | 4.50″ | 2.25″ | 3.13″ | .31″ | 1.25″ | 8 |
3″ | 3.60″ | 12.00″ | 9.00″ | 5.25″ | 2.63″ | 3.63″ | .38″ | 1.38″ | 8 |
4″ | 4.60″ | 14.00″ | 10.75″ | 6.50″ | 3.00″ | 4.25″ | .44″ | 1.63″ | 8 |
5″ | 5.69″ | 16.50″ | 12.75″ | 8.00″ | 3.63″ | 5.13″ | .44″ | 1.88″ | 8 |
6″ | 6.75″ | 19.00″ | 14.50″ | 9.25″ | 4.25″ | 6.00″ | .50″ | 2.13″ | 8 |
8″ | 8.75″ | 21.75″ | 17.25″ | 12.00″ | 5.00″ | 7.00″ | .50″ | 2.13″ | 12 |
10″ | 10.92″ | 26.50″ | 21.25″ | 14.75″ | 6.50″ | 9.00″ | .50″ | 2.63″ | 12 |
12″ | 12.92″ | 30.00″ | 24.38″ | 17.38″ | 7.25″ | 10.00″ | .50″ | 2.88″ | 12 |
LAP-JOINT FLANGES SIZES in MILLIMETERS
LAP-JOINT CLASS 150
Lap joint flange dimensions class 150 in millimeters (ASME B16.5)
Size inch | D mm | X mm | t mm | B3 mm | T3 mm | R° |
---|---|---|---|---|---|---|
1/2 | 89 | 30.2 | 11.2 | 22.9 | 15.7 | 3.0 |
3/4 | 99 | 38.1 | 12.7 | 28.2 | 15.7 | 3.0 |
1 | 108 | 49.3 | 14.2 | 35.1 | 17.5 | 3.0 |
1¼ | 117 | 58.7 | 15.7 | 43.7 | 20.6 | 4.8 |
1½ | 127 | 65.0 | 17.5 | 50.0 | 22.4 | 6.4 |
2 | 152 | 77.7 | 19.1 | 62.5 | 25.4 | 7.9 |
2½ | 178 | 90.4 | 22.4 | 75.4 | 28.4 | 7.9 |
3 | 191 | 108.0 | 23.9 | 91.4 | 30.2 | 9.7 |
3½ | 216 | 122.2 | 23.9 | 104.1 | 31.8 | 9.7 |
4 | 229 | 134.9 | 23.9 | 116.8 | 33.3 | 11.2 |
5 | 254 | 163.6 | 23.9 | 144.5 | 36.6 | 11.2 |
6 | 279 | 192.0 | 25.4 | 171.5 | 39.6 | 12.7 |
8 | 343 | 246.1 | 28.4 | 223.3 | 44.5 | 12.7 |
10 | 406 | 304.8 | 30.2 | 277.4 | 49.3 | 12.7 |
12 | 483 | 365.3 | 31.8 | 328.2 | 55.6 | 12.7 |
14 | 533 | 400.1 | 35.1 | 360.2 | 79.2 | 12.7 |
16 | 597 | 457.2 | 36.6 | 411.2 | 87.4 | 12.7 |
18 | 635 | 505.0 | 39.6 | 462.3 | 96.8 | 12.7 |
20 | 699 | 558.8 | 42.9 | 514.4 | 103.1 | 12.7 |
24 | 813 | 663.4 | 47.8 | 616.0 | 111.3 | 12.7 |
Size | Drilling | Bolting | |||||
---|---|---|---|---|---|---|---|
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 |
LAP-JOINT CLASS 300
Lap joint flange dimensions class 300 in millimeters (ASME B16.5)
Size inch | D mm | X mm | t mm | B3 mm | T3 mm | R° |
---|---|---|---|---|---|---|
1/2 | 95 | 38.1 | 14.2 | 22.9 | 22.4 | 3.0 |
3/4 | 117 | 47.8 | 15.7 | 28.2 | 25.4 | 3.0 |
1 | 124 | 53.8 | 17.5 | 35.1 | 26.9 | 3.0 |
1¼ | 133 | 63.5 | 19.1 | 43.7 | 26.9 | 4.8 |
1½ | 155 | 69.9 | 20.6 | 50.0 | 30.2 | 6.4 |
2 | 165 | 84.1 | 22.4 | 62.5 | 33.3 | 7.9 |
2½ | 191 | 100.1 | 25.4 | 75.4 | 38.1 | 7.9 |
3 | 210 | 117.3 | 28.4 | 91.4 | 42.9 | 9.7 |
3½ | 229 | 133.4 | 30.2 | 104.1 | 44.5 | 9.7 |
4 | 254 | 146.1 | 31.8 | 116.8 | 47.8 | 11.2 |
5 | 279 | 177.8 | 35.1 | 144.5 | 50.8 | 11.2 |
6 | 318 | 206.2 | 36.6 | 171.5 | 52.3 | 12.7 |
8 | 381 | 260.4 | 41.1 | 222.3 | 62.0 | 12.7 |
10 | 445 | 320.5 | 47.8 | 277.4 | 66.5 | 12.7 |
12 | 521 | 374.7 | 50.8 | 328.2 | 101.6 | 12.7 |
14 | 584 | 425.5 | 63.8 | 360.2 | 111.3 | 12.7 |
16 | 648 | 482.6 | 57.2 | 411.2 | 120.7 | 12.7 |
18 | 711 | 533.4 | 60.5 | 462.3 | 130.0 | 12.7 |
20 | 775 | 587.2 | 63.5 | 514.4 | 139.7 | 12.7 |
24 | 914 | 701.5 | 69.9 | 616.0 | 152.4 | 12.7 |
Size | Drilling | Bolting | |||||
---|---|---|---|---|---|---|---|
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 |
LAP-JOINT CLASS 600
Lap joint flange dimensions class 600 in millimeters (ASME B16.5)
Size inch | D mm | X mm | t mm | B3 mm | T3 mm | R° |
---|---|---|---|---|---|---|
1/2 | 95 | 38.1 | 14.2 | 22.9 | 22.4 | 3.0 |
3/4 | 117 | 47.8 | 15.7 | 28.2 | 25.4 | 3.0 |
1 | 124 | 53.8 | 17.5 | 35.1 | 26.9 | 3.0 |
1¼ | 133 | 63.5 | 20.6 | 43.7 | 28.4 | 4.8 |
1½ | 155 | 69.9 | 22.4 | 50.0 | 31.8 | 6.4 |
2 | 165 | 84.1 | 25.4 | 62.5 | 36.6 | 7.9 |
2½ | 191 | 100.1 | 28.4 | 75.4 | 41.1 | 7.9 |
3 | 210 | 117.3 | 31.8 | 91.4 | 46.0 | 9.7 |
3½ | 229 | 133.4 | 35.1 | 104.1 | 49.3 | 9.7 |
4 | 273 | 152.4 | 38.1 | 116.8 | 53.8 | 11.2 |
5 | 330 | 189.0 | 44.5 | 144.5 | 60.5 | 11.2 |
6 | 356 | 222.3 | 47.8 | 171.5 | 66.5 | 12.7 |
8 | 419 | 273.1 | 55.6 | 222.3 | 76.2 | 12.7 |
10 | 508 | 342.9 | 63.5 | 277.4 | 111.3 | 12.7 |
12 | 559 | 400.1 | 66.5 | 328.2 | 117.3 | 12.7 |
14 | 603 | 431.8 | 69.9 | 360.2 | 127.0 | 12.7 |
16 | 686 | 495.3 | 76.2 | 411.2 | 139.7 | 12.7 |
18 | 743 | 546.1 | 82.6 | 462.3 | 152.4 | 12.7 |
20 | 813 | 609.6 | 88.9 | 514.4 | 165.1 | 12.7 |
24 | 940 | 717.6 | 101.6 | 616.0 | 184.2 | 12.7 |
Size | Drilling | Bolting | |||||
---|---|---|---|---|---|---|---|
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 |
LAP-JOINT CLASS 900
Lap joint flange dimensions class 900 in millimeters (ASME B16.5)
Size inch | D mm | X mm | t mm | B3 mm | T3 mm | R° |
---|---|---|---|---|---|---|
1/2 | 121 | 38.1 | 22.4 | 22.9 | 31.8 | 3.0 |
3/4 | 130 | 44.5 | 25.4 | 28.2 | 35.1 | 3.0 |
1 | 149 | 52.3 | 28.4 | 35.1 | 41.1 | 3.0 |
1¼ | 159 | 63.5 | 28.4 | 43.7 | 41.1 | 4.8 |
1½ | 178 | 69.9 | 31.8 | 50.0 | 44.5 | 6.4 |
2 | 216 | 104.6 | 38.1 | 62.5 | 57.2 | 7.9 |
2½ | 244 | 124.0 | 41.1 | 75.4 | 63.5 | 7.9 |
3 | 241 | 127.0 | 38.1 | 91.4 | 53.8 | 9.7 |
4 | 292 | 158.8 | 44.5 | 116.8 | 69.9 | 11.2 |
5 | 349 | 190.5 | 50.8 | 144.5 | 79.2 | 11.2 |
6 | 381 | 235.0 | 55.6 | 171.5 | 85.9 | 12.7 |
8 | 470 | 298.5 | 63.5 | 222.3 | 114.3 | 12.7 |
10 | 546 | 368.3 | 69.9 | 277.4 | 127.0 | 12.7 |
12 | 610 | 419.1 | 79.2 | 328.2 | 142.7 | 12.7 |
14 | 641 | 450.9 | 85.9 | 360.2 | 155.4 | 12.7 |
16 | 705 | 508.0 | 88.9 | 411.2 | 165.1 | 12.7 |
18 | 787 | 565.2 | 101.6 | 42.3 | 190.5 | 12.7 |
20 | 857 | 622.3 | 108.0 | 514.4 | 209.6 | 12.7 |
24 | 1041 | 749.3 | 139.7 | 616.0 | 266.7 | 12.7 |
Size | Drilling | Bolting | |||||
---|---|---|---|---|---|---|---|
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 |
LAP JOINT FLANGE TOLERANCE
ASME B16.5 sets forth tolerances for lap-joint flanges to ensure proper fit, functionality, and sealing within piping systems. While the standard provides detailed specifications for various flange dimensions across different sizes and pressure classes, here is a summary of general tolerance values for key dimensions of lap-joint flanges according to ASME B16.5. For precise values, especially for specific flange sizes and classes, direct reference to the ASME B16.5 standard is advised.
Diameter of Bolt Circle (P):
Tolerance: ±1.6 mm (±1/16 inch) for flanges through NPS 24.
Diameter of Bolt Holes (Q):
Tolerance: The diameter is typically oversized by +3 mm (1/8 inch) relative to the nominal bolt size to allow for alignment discrepancies during installation.
Flange Thickness (T):
Tolerance: This may vary, but a general guideline for flanges up to NPS 24 is ±3 mm (±1/8 inch). This tolerance ensures that the flange has adequate strength while avoiding unnecessary weight.
Hub Diameter at Base (X):
Tolerance: This dimension is critical for the fit of the lap-joint flange over the stub end. Tolerances can vary but are essential for ensuring a proper fit that facilitates easy alignment and assembly.
Outside Diameter of Flange (O):
Tolerance: ±1.6 mm (±1/16 inch) for flanges up to NPS 24, ensuring that the flange will properly fit within the mating piping components and supports.
Inside Diameter of Flange (B):
Tolerance: For lap-joint flanges, the inside diameter at the back of the flange (where it mates with the stub end) should closely match the outside diameter of the stub end. The tolerance is typically -0/+3 mm (-0/+1/8 inch) for smaller sizes, to ensure a snug fit without hindering the assembly.
Facing Finish:
Tolerance: The surface finish for the flange face that mates with the gasket is specified in terms of Ra (Roughness Average), with the standard providing specific values based on the type of gasket material used. This ensures an adequate seal is achieved.
Drilling:
Tolerance: Bolt holes are to be evenly spaced around the bolt circle, and the tolerance for the number of holes must be precise to ensure alignment with the mating flange.
Engineers and designers must adhere to these tolerances during flange fabrication, selection, and installation to ensure the integrity of the flanged joint and the overall piping system. Accurate implementation of these tolerances facilitates proper alignment, sealing, and function of the piping system under various operating conditions.
LAP-JOINT FLANGE WEIGHTS
LAP-JOINT FLANGE WEIGHT IN KGS.
The table shows the ASME B16.5 Lap Joint flange weights in Kgs. by Flange NPS and Class (carbon/alloy steel materials; for higher grades, consider adjusting weight using the delta-specific weight carbon/other grades)
NPS | Class 150 | Class 300 | Class 400 | Class 600 | Class 900 | Class 1500 | Class 2500 |
1/2 | 0.5 | 0.9 | 0.9 | 0.9 | 2.7 | 2.7 | 3.2 |
3/4 | 0.9 | 1.4 | 1.4 | 1.4 | 2.7 | 2.7 | 3.6 |
1 | 0.9 | 1.4 | 1.6 | 1.8 | 3.4 | 3.6 | 5.4 |
1¼ | 1.4 | 2.1 | 2 | 2.3 | 4.5 | 4.5 | 7.7 |
1½ | 1.4 | 2.9 | 2.9 | 3.2 | 6.3 | 6.3 | 10.8 |
2 | 2.3 | 3.2 | 3.6 | 4.1 | 9.5 | 11.3 | 16.7 |
2½ | 3.6 | 4.5 | 4 | 5.4 | 11.3 | 15.8 | 23.9 |
3 | 4.1 | 6.5 | 6.3 | 6.8 | 13 | 21.2 | |
3½ | 4 | 7.7 | 9 | 9 | 36 | ||
4 | 5.9 | 10.8 | 11.3 | 16.2 | 22 | 33.8 | 54.9 |
5 | 6.8 | 12.6 | 13 | 28.4 | 36.5 | 63 | 91.8 |
6 | 8.6 | 17.6 | 18.9 | 35.1 | 47.3 | 76.5 | 141.3 |
8 | 13.5 | 26.1 | 28.8 | 50.4 | 85.5 | 128.7 | 211.9 |
10 | 19.4 | 40 | 49.5 | 87.8 | 124.7 | 218.3 | 403.7 |
12 | 28.8 | 63 | 68.4 | 108 | 166 | 337.1 | 567.9 |
14 | 47.3 | 85.5 | 94.5 | 130.5 | 186.8 | 400.5 | |
16 | 63 | 105.3 | 126 | 180 | 219.6 | 562.5 | |
18 | 72 | 137.3 | 155.3 | 211.1 | 301.5 | 663.8 | |
20 | 87.8 | 168.8 | 189 | 271.8 | 390.6 | 798.8 | |
22 | 110.3 | 195.8 | 204.8 | 301.5 | |||
24 | 123.8 | 247.5 | 276.8 | 389.7 | 746.6 | 1271 |
LAP-JOINT FLANGE WEIGHT IN LBS.
The table shows the ASME B16.5 Lap Joint flange weights in Lbs. by Flange NPS and Class (carbon/alloy steel materials; for higher grades, consider adjusting weight using the delta-specific weight carbon/other grades)
CLASS 150 | Nominal Pipe Size | Lap Joint Weight in Lbs./unit |
½ | 1 | |
¾ | 2 | |
1 | 2 | |
1¼ | 3 | |
1½ | 3 | |
2 | 5 | |
2½ | 8 | |
3 | 9 | |
3½ | 11 | |
4 | 13 | |
5 | 15 | |
6 | 19 | |
8 | 30 | |
10 | 43 | |
12 | 64 | |
14 | 105 | |
16 | 140 | |
18 | 160 | |
20 | 195 | |
22 | 245 | |
24 | 275 | |
CLASS 300 | Nominal Pipe Size | Lap Joint Weight in Lbs./unit |
½ | 2 | |
¾ | 3 | |
1 | 3 | |
1¼ | 4.5 | |
1½ | 6.5 | |
2 | 7 | |
2½ | 10 | |
3 | 14.5 | |
3½ | 17 | |
4 | 24 | |
5 | 28 | |
6 | 39 | |
8 | 58 | |
10 | 91 | |
12 | 140 | |
14 | 190 | |
16 | 234 | |
18 | 305 | |
20 | 375 | |
22 | 435 | |
24 | 550 | |
CLASS 400 | Nominal Pipe Size | Lap Joint Weight in Lbs./unit |
½ | 2 | |
¾ | 3 | |
1 | 3.5 | |
1¼ | 4.5 | |
1½ | 6.5 | |
2 | 8 | |
2½ | 11 | |
3 | 14 | |
3½ | 20 | |
4 | 25 | |
5 | 29 | |
6 | 42 | |
8 | 64 | |
10 | 110 | |
12 | 152 | |
14 | 210 | |
16 | 280 | |
18 | 345 | |
20 | 420 | |
22 | 455 | |
24 | 615 | |
CLASS 600 | Nominal Pipe Size | Lap Joint Weight in Lbs./unit |
½ | 2 | |
¾ | 3 | |
1 | 4 | |
1¼ | 5 | |
1½ | 7 | |
2 | 9 | |
2½ | 12 | |
3 | 15 | |
3½ | 20 | |
4 | 36 | |
5 | 63 | |
6 | 78 | |
8 | 112 | |
10 | 195 | |
12 | 240 | |
14 | 290 | |
16 | 400 | |
18 | 469 | |
20 | 604 | |
22 | 670 | |
24 | 866 | |
CLASS 900 | Nominal Pipe Size | Lap Joint Weight in Lbs./unit |
½ | 6 | |
¾ | 6 | |
1 | 7.5 | |
1¼ | 10 | |
1½ | 14 | |
2 | 21 | |
2½ | 25 | |
3 | 29 | |
4 | 51 | |
5 | 81 | |
6 | 105 | |
8 | 190 | |
10 | 277 | |
12 | 371 | |
14 | 415 | |
16 | 488 | |
18 | 670 | |
20 | 868 | |
24 | 1659 | |
CLASS 1500 | Nominal Pipe Size | Lap Joint Weight in Lbs./unit |
½ | 6 | |
¾ | 6 | |
1 | 8 | |
1¼ | 10 | |
1½ | 14 | |
2 | 25 | |
2½ | 35 | |
3 | 47 | |
4 | 75 | |
5 | 140 | |
6 | 170 | |
8 | 286 | |
10 | 485 | |
12 | 749 | |
14 | 890 | |
16 | 1250 | |
18 | 1475 | |
20 | 1775 | |
24 | 2825 | |
CLASS 2500 | Nominal Pipe Size | Lap Joint Weight in Lbs./unit |
½ | 7 | |
¾ | 8 | |
1 | 12 | |
1¼ | 17 | |
1½ | 24 | |
2 | 37 | |
2½ | 53 | |
3 | 80 | |
4 | 122 | |
5 | 204 | |
6 | 314 | |
8 | 471 | |
10 | 897 | |
12 | 1262 |
One Response
Hello,
what about over 4 inches LJ flanges?
Need information about 24in LJ flange class 300 FF ASME 16.47 Series B, but i cant find information
What is the standard for LJ flanges over 24in?
Thanks in advance