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Threaded Flange Dimensions (Cl. 150/300/900/1500/2500)

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Table of Contents

The charts show the dimensions of threaded flange class 150, 300, 400, 900, 1500, 2500 in inches and in millimeters.

THREADED FLANGE DIMENSIONS IN INCHES

THREADED CLASS 150

Threaded flange dimensions class 150 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″ 0.93″ 3.50″ 2.38″ 1.38″ .063″ 1.19″ .62″ .38″ .56″ .62″ 4
3/4″ 1.14″ 3.88″ 2.75″ 1.69″ .063″ 1.50″ .62″ .44″ .56″ .62″ 4
1″ 1.41″ 4.25″ 3.12″ 2.00″ .063″ 1.94″ .69″ .50″ .63″ .62″ 4
1-1/4″ 1.75″ 4.62″ 3.50″ 2.50″ .063″ 2.31″ .81″ .56″ .75″ .62″ 4
1-1/2″ 1.99″ 5.00″ 3.88″ 2.88″ .063″ 2.56″ .88″ .62″ .82″ .62″ 4
2″ 2.50″ 6.00″ 4.75″ 3.62″ .063″ 3.06″ 1.00″ .69″ .94″ .75″ 4
2-1/2″ 3.00″ 7.00″ 5.50″ 4.12″ .063″ 3.56″ 1.12″ .82″ 1.06″ .75″ 4
3″ 3.63″ 7.50″ 6.00″ 5.00″ .063″ 4.25″ 1.19″ .88″ 1.13″ .75″ 4
3-1/2″ 4.13″ 8.50″ 7.00″ 5.50″ .063″ 4.81″ 1.25″ .88″ 1.19″ .75″ 8
4″ 4.63″ 9.00″ 7.50″ 6.19″ .063″ 5.31″ 1.31″ .88″ 1.25″ .75″ 8
5″ 5.69″ 10.00″ 8.50″ 7.31″ .063″ 6.44″ 1.44″ .88″ 1.38″ .88″ 8
6″ 6.75″ 11.00″ 9.50″ 8.50″ .063″ 7.56″ 1.56″ .94″ 1.50″ .88″ 8
8″ 8.75″ 13.50″ 11.75″ 10.62″ .063″ 9.69″ 1.75″ 1.06″ 1.69″ .88″ 8
10″ 10.88″ 16.00″ 14.25″ 12.75″ .063″ 12.00″ 1.94″ 1.13″ 1.88″ 1.00″ 12
12″ 12.94″ 19.00″ 17.00″ 15.00″ .063″ 14.38″ 2.19″ 1.19″ 2.13″ 1.00″ 12
14″ 14.19″ 21.00″ 18.75″ 16.25″ .063″ 15.75″ 2.25″ 1.32″ 2.19″ 1.12″ 12
16″ 16.19″ 23.50″ 21.25″ 18.50″ .063″ 18.00″ 2.50″ 1.38″ 2.44″ 1.12″ 16
18″ 18.19″ 25.00″ 22.75″ 21.00″ .063″ 19.88″ 2.69″ 1.50″ 2.63″ 1.25″ 16
20″ 20.19″ 27.50″ 25.00″ 23.00″ .063″ 22.00″ 2.88″ 1.63″ 2.83″ 1.25″ 20
22″ 22.19″ 29.50″ 27.25″ 25.25″ .063″ 24.25″ 3.13″ 1.75″ 3.07″ 1.38″ 20
24″ 24.19″ 32.00″ 29.50″ 27.25″ .063″ 26.12″ 3.25″ 1.82″ 3.19″ 1.38″ 20

THREADED CLASS 300

Threaded flange dimensions class 300 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″ 0.93″ 3.75″ 2.62″ 1.38″ .063″ 1.50″ 0.88″ 0.50″ 0.82″ 0.62″ 4
3/4″ 1.14″ 4.62″ 3.25″ 1.69″ .063″ 1.88″ 1.00″ .056″ 0.94″ 0.75″ 4
1″ 1.41″ 4.88″ 3.50″ 2.00″ .063″ 2.12″ 1.06″ 0.63″ 1.00″ 0.75″ 4
1-1/4″ 1.75″ 5.25″ 3.88″ 2.50″ .063″ 2.50″ 1.06″ 0.69″ 1.00″ 0.75″ 4
1-1/2″ 1.99″ 6.12″ 4.50″ 2.88″ .063″ 2.75″ 1.19″ 0.75″ 1.13″ 0.88″ 4
2″ 2.50″ 6.50″ 5.00″ 3.62″ .063″ 3.31″ 1.31″ 0.82″ 1.25″ 0.75″ 8
2-1/2″ 3.00″ 7.50″ 5.88″ 4.12″ .063″ 3.94″ 1.50″ 0.94″ 1.44″ 0.88″ 8
3″ 3.63″ 8.25″ 6.62″ 5.00″ .063″ 4.62″ 1.69″ 1.06″ 1.63″ 0.88″ 8
3-1/2″ 4.13″ 9.00″ 7.25″ 5.50″ .063″ 5.25″ 1.75″ 1.13″ 1.69″ 0.88″ 8
4″ 4.63″ 10.00″ 7.88″ 6.19″ .063″ 5.75″ 1.88″ 1.19″ 1.82″ 0.88″ 8
5″ 5.69″ 11.00″ 9.25″ 7.31″ .063″ 7.00″ 2.00″ 1.32″ 1.94″ 0.88″ 8
6″ 6.75″ 12.50″ 10.62″ 8.50″ .063″ 8.12″ 2.06″ 1.38″ 2.00″ 0.88″ 12
8″ 8.75″ 15.00″ 13.00″ 10.62″ .063″ 10.25″ 2.44″ 1.56″ 2.38″ 1.00″ 12
10″ 10.88″ 17.50″ 15.25″ 12.75″ .063″ 12.62″ 2.62″ 1.82″ 2.56″ 1.12″ 16
12″ 12.94″ 20.50″ 17.75″ 15.00″ .063″ 14.75″ 2.88″ 1.94″ 2.82″ 1.25″ 16
14″ 14.19″ 23.00″ 20.25″ 16.25″ .063″ 16.75″ 3.00″ 2.06″ 2.94″ 1.25″ 20
16″ 16.19″ 25.50″ 22.50″ 18.50″ .063″ 19.00″ 3.25″ 2.19″ 3.19″ 1.38″ 20
18″ 18.19″ 28.00″ 24.75″ 21.00″ .063″ 21.00″ 3.50″ 2.32″ 3.44″ 1.38″ 24
20″ 20.19″ 30.50″ 27.00″ 23.00″ .063″ 23.12″ 3.75″ 2.44″ 3.69″ 1.38″ 24
22″ 22.19″ 33.00″ 29.25″ 25.25″ .063″ 25.25″ 4.00″ 2.57″ 3.94″ 1.63″ 24
24″ 24.19″ 36.00″ 32.00″ 27.25″ .063″ 27.62″ 4.19″ 2.69″ 4.13″ 1.62″ 24

THREADED CLASS 400

Threaded flange dimensions class 400 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″ 0.93″ 3.75″ 2.62″ 0.12″ .250″ 1.50″ 1.13″ 0.56″ 0.88″ 0.62″ 4
3/4″ 1.14″ 4.62″ 3.25″ 0.12″ .250″ 1.88″ 1.25″ 0.62″ 1.00″ 0.75″ 4
1″ 1.41″ 4.88″ 3.50″ 0.12″ .250″ 2.12″ 1.31″ 0.69″ 1.06″ 0.75″ 4
1-1/4″ 1.75″ 5.25″ 3.88″ 0.19″ .250″ 2.50″ 1.37″ 0.81″ 1.12″ 0.75″ 4
1-1/2″ 1.99″ 6.12″ 4.50″ 0.25″ .250″ 2.75″ 1.50″ 0.88″ 1.25″ 0.88″ 4
2″ 2.50″ 6.50″ 5.00″ 0.31″ .250″ 3.31″ 1.69″ 1.00″ 1.44″ 0.75″ 8
2-1/2″ 3.00″ 7.50″ 5.88″ 0.31″ .250″ 3.94″ 1.87″ 1.12″ 1.62″ 0.88″ 8
3″ 3.63″ 8.25″ 6.62″ 0.38″ .250″ 4.62″ 2.06″ 1.25″ 1.81″ 0.88″ 8
3-1/2″ 4.13″ 9.00″ 7.25″ 0.38″ .250″ 5.25″ 2.19″ 1.38″ 1.94″ 1.00″ 8
4″ 4.63″ 10.00″ 7.88″ 0.44″ .250″ 5.75″ 2.25″ 1.38″ 2.00″ 1.00″ 8
5″ 5.69″ 11.00″ 9.25″ 0.44″ .250″ 7.00″ 2.37″ 1.50″ 2.12″ 1.00″ 8
6″ 6.75″ 12.50″ 10.62″ 0.50″ .250″ 8.12″ 2.50″ 1.62″ 2.25″ 1.00″ 12
8″ 8.75″ 15.00″ 13.00″ 0.50″ .250″ 10.25″ 2.94″ 1.88″ 2.69″ 1.12″ 12
10″ 10.88″ 17.50″ 15.25″ 0.50″ .250″ 12.62″ 3.13″ 2.12″ 2.88″ 1.25″ 16
12″ 12.94″ 20.50″ 17.75″ 0.50″ .250″ 14.75″ 3.37″ 2.25″ 3.12″ 1.38″ 16
14″ 14.19″ 23.00″ 20.25″ 0.50″ .250″ 16.75″ 3.56″ 2.38″ 3.31″ 1.38″ 20
16″ 16.19″ 25.50″ 22.50″ 0.50″ .250″ 19.00″ 3.94″ 2.50″ 3.69″ 1.50″ 20
18″ 18.19″ 28.00″ 24.75″ 0.50″ .250″ 21.00″ 4.13″ 2.62″ 3.88″ 1.50″ 24
20″ 20.19″ 30.50″ 27.00″ 0.50″ .250″ 23.12″ 4.25″ 2.75″ 4.00″ 1.62″ 24
22″ 22.19″ 33.00″ 29.25″ 0.50″ .250″ 25.25″ 4.50″ 2.88″ 4.25″ 1.75″ 24
24″ 24.19″ 36.00″ 32.00″ 0.50″ .250″ 27.62″ 4.75″ 3.00″ 4.50″ 1.88″ 24

THREADED CLASS 600

Threaded flange dimensions class 600 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″ 0.93″ 3.75″ 2.62″ 1.38″ .250″ 1.50″ 1.13″ 0.56″ 0.88″ 0.62″ 4
3/4″ 1.14″ 4.62″ 3.25″ 1.69″ .250″ 1.88″ 1.25″ 0.62″ 1.00″ 0.75″ 4
1″ 1.41″ 4.88″ 3.50″ 2.00″ .250″ 2.12″ 1.31″ 0.69″ 1.06″ 0.75″ 4
1-1/4″ 1.75″ 5.25″ 3.88″ 2.50″ .250″ 2.50″ 1.37″ 0.81″ 1.12″ 0.75″ 4
1-1/2″ 1.99″ 6.12″ 4.50″ 2.88″ .250″ 2.75″ 1.50″ 0.88″ 1.25″ 0.88″ 4
2″ 2.50″ 6.50″ 5.00″ 3.62″ .250″ 3.31″ 1.69″ 1.00″ 1.44″ 0.75″ 8
2-1/2″ 3.00″ 7.50″ 5.88″ 4.12″ .250″ 3.94″ 1.87″ 1.12″ 1.62″ 0.88″ 8

THREADED CLASS 900

Threaded flange dimensions class 900 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″ 0.93″ 4.75″ 3.25″ 1.38″ .250″ 1.50″ 1.50″ 0.88″ 1.25″ 0.88″ 4
3/4″ 1.14″ 5.13″ 3.50″ 1.69″ .250″ 1.75″ 1.63″ 1.00″ 1.38″ 0.88″ 4
1″ 1.41″ 5.88″ 4.00″ 2.00″ .250″ 2.06″ 1.88″ 1.13″ 1.63″ 1.00″ 4
1-1/4″ 1.75″ 6.25″ 4.38″ 2.50″ .250″ 2.50″ 1.88″ 1.13″ 1.63″ 1.00″ 4
1-1/2″ 1.99″ 7.00″ 4.88″ 2.88″ .250″ 2.75″ 2.00″ 1.25″ 1.75″ 1.13″ 4
2″ 2.50″ 8.50″ 6.50″ 3.63″ .250″ 4.13″ 2.50″ 1.50″ 2.25″ 1.00″ 8
2-1/2″ 3.00″ 9.63″ 7.50″ 4.13″ .250″ 4.88″ 2.75″ 1.63″ 2.50″ 1.13″ 8
3″ 3.63″ 9.50″ 7.50″ 5.00″ .250″ 5.00″ 2.38″ 1.50″ 2.13″ 1.00″ 8
4″ 4.63″ 11.50″ 9.25″ 6.19″ .250″ 6.25″ 3.00″ 1.75″ 2.75″ 1.25″ 8
5″ 5.69″ 13.75″ 11.00″ 7.31″ .250″ 7.50″ 3.38″ 3.00″ 3.13″ 1.38″ 8
6″ 6.75″ 15.00″ 12.50″ 8.50″ .250″ 9.25″ 3.63″ 2.19″ 3.38″ 1.25″ 12
8″ 8.75″ 18.50″ 15.50″ 10.63″ .250″ 11.75″ 4.25″ 2.50″ 4.00″ 1.50″ 12
10″ 10.88″ 21.50″ 18.50″ 12.75″ .250″ 14.50″ 4.50″ 2.75″ 4.25″ 1.50″ 16
12″ 12.94″ 24.00″ 21.00″ 15.00″ .250″ 16.50″ 4.88″ 3.13″ 4.63″ 1.50″ 20
14″ 14.19″ 25.25″ 22.00″ 16.25″ .250″ 17.75″ 5.38″ 3.38″ 5.13″ 1.63″ 20
16″ 16.19″ 27.75″ 24.25″ 18.50″ .250″ 20.00″ 5.50″ 3.50″ 5.25″ 1.75″ 20
18″ 18.19″ 31.00″ 27.00″ 21.00″ .250″ 22.25″ 6.25″ 4.00″ 6.00″ 2.00″ 20
20″ 20.19″ 33.75″ 29.50″ 23.00″ .250″ 24.50″ 6.50″ 4.25″ 6.25″ 2.13″ 20
24″ 24.19″ 41.00″ 35.50″ 27.25″ .250″ 29.50″ 8.25″ 5.50″ 8.00″ 2.63″ 20

THREADED CLASS 1500

Threaded 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″ 0.93″ 4.75″ 3.25″ 1.38″ .250″ 1.50″ 1.50″ 0.88″ 1.25″ 0.88″ 4
3/4″ 1.14″ 5.13″ 3.50″ 1.69″ .250″ 1.75″ 1.63″ 1.00″ 1.38″ 0.88″ 4
1″ 1.41″ 5.88″ 4.00″ 2.00″ .250″ 2.06″ 1.88″ 1.13″ 1.63″ 1.00″ 4
1-1/4″ 1.75″ 6.25″ 4.38″ 2.50″ .250″ 2.50″ 1.88″ 1.13″ 1.63″ 1.00″ 4
1-1/2″ 1.99″ 7.00″ 4.88″ 2.88″ .250″ 2.75″ 2.00″ 1.25″ 1.75″ 1.13″ 4
2″ 2.50″ 8.50″ 6.50″ 3.63″ .250″ 4.13″ 2.50″ 1.50″ 2.25″ 1.00″ 8
2-1/2″ 3.00″ 9.63″ 7.50″ 4.13″ .250″ 4.88″ 2.75″ 1.63″ 2.50″ 1.13″ 8

THREADED CLASS 2500

Threaded flange dimensions class 2500 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″ 0.93″ 5.25″ 3.50″ 1.38″ .250″ 1.69″ 1.81″ 1.19″ 1.56″ 0.88″ 4
3/4″ 1.14″ 5.50″ 3.75″ 1.69″ .250″ 2.00″ 1.94″ 1.25″ 1.69″ 0.88″ 4
1″ 1.41″ 6.25″ 4.25″ 2.00″ .250″ 2.25″ 2.13″ 1.38″ 1.88″ 1.00″ 4
1-1/4″ 1.75″ 7.25″ 5.13″ 2.50″ .250″ 2.88″ 2.31″ 1.50″ 2.06″ 1.13″ 4
1-1/2″ 1.99″ 8.00″ 5.75″ 2.88″ .250″ 3.13″ 2.63″ 1.75″ 2.38″ 1.25″ 4
2″ 2.50″ 9.25″ 6.75″ 3.63″ .250″ 3.75″ 3.00″ 2.00″ 2.75″ 1.13″ 8
2-1/2″ 3.00″ 10.50″ 7.75″ 4.13″ .250″ 4.50″ 3.38″ 2.25″ 3.13″ 1.25″ 8

THREADED FLANGE DIMENSIONS IN MILLIMETERS

THREADED CLASS 150

Threaded flange dimensions class 150 in millimeters (ASME B16.5)

Size
inch		 D
mm		 X
mm		 G
mm		 t
mm		 T2
mm		 Q
mm
1/2 89 30.2 35.1 11.2 15.7 15.7
3/4 99 38.1 42.9 12.7 15.7 15.7
1 108 49.3 50.8 14.2 17.5 17.5
1¼ 117 58.7 63.5 15.7 20.6 20.6
1½ 127 65.0 73.2 17.5 22.4 22.4
2 152 77.7 91.9 19.1 25.4 25.4
2½ 178 90.4 104.6 22.4 28.4 28.4
3 191 108.0 127.0 23.9 30.2 30.2
3½ 216 122.2 139.7 23.9 31.8 31.8
4 229 134.9 157.2 23.9 33.3 33.3
5 254 163.6 185.7 23.9 36.6 36.6
6 279 192.0 215.9 25.4 39.6 39.6
8 343 246.1 269.7 28.4 44.5 44.5
10 406 304.8 323.9 30.2 49.3 49.3
12 483 365.3 381.0 31.8 55.6 55.6
14 533 400.1 412.8 35.1 57.2 57.2
16 597 457.2 469.9 36.6 63.5 63.5
18 635 505.0 533.4 39.6 68.3 68.3
20 699 558.8 584.2 42.9 73.2 73.2
24 813 663.4 692.2 47.8 82.6 82.6

 

Size Bolts 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

THREADED CLASS 300

Threaded flange dimensions class 300 in millimeters (ASME B16.5)

Size
inch		 D
mm		 X
mm		 G
mm		 t
mm		 B
mm		 T2
mm		 Q
mm
1/2 95 38.1 35.1 14.2 23.6 22.4 15.7
3/4 117 47.8 42.9 15.7 29.0 25.4 15.7
1 124 53.8 50.8 17.5 35.8 26.9 17.5
1¼ 133 63.5 63.5 19.1 44.5 26.9 20.6
1½ 155 69.9 73.2 20.6 50.5 30.2 22.4
2 165 84.1 91.9 22.4 63.5 33.3 28.4
2½ 191 100.1 104.6 25.4 76.2 38.1 31.8
3 210 117.3 127.0 28.4 92.2 42.9 31.8
3½ 229 133.4 139.7 30.2 104.9 44.5 36.6
4 254 146.1 157.2 31.8 117.6 47.8 36.6
5 279 177.8 185.7 35.1 144.5 50.8 42.9
6 318 206.2 215.9 36.6 171.5 52.3 46.0
8 381 260.4 269.7 41.1 222.3 62.0 50.8
10 445 320.5 323.9 47.8 276.4 66.5 55.6
12 521 374.7 381.0 50.8 328.7 73.2 60.5
14 584 425.5 412.8 63.8 360.4 76.2 63.5
16 648 482.6 469.9 57.2 411.2 82.6 68.3
18 711 533.4 533.4 60.5 462.0 88.9 69.9
20 775 587.2 584.2 63.5 512.8 95.3 73.2
24 914 701.5 692.2 69.9 614.4 106.4 82.6

 

Size Bolts 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

THREADED CLASS 600

Threaded flange dimensions class 600 in millimeters (ASME B16.5)

Size
inch		 D
mm		 X
mm		 G
mm		 t
mm		 B2
mm		 T2
mm		 Q
mm
1/2 95 38.1 35.1 14.2 22.4 22.4 15.7
3/4 117 47.8 42.9 15.7 27.7 25.4 15.7
1 124 53.8 50.8 17.5 34.5 26.9 17.5
1¼ 133 63.5 63.5 20.6 43.2 28.4 20.6
1½ 155 69.9 73.2 22.4 49.5 31.8 22.4
2 165 84.1 91.9 25.4 62.0 36.6 28.4
2½ 191 100.1 104.6 28.4 74.7 41.1 31.8
3 210 117.3 127.0 31.8 90.7 46.0 35.1
3½ 229 133.4 139.7 35.1 103.4 49.3 39.6
4 273 152.4 157.2 38.1 116.1 53.8 41.1
5 330 189.0 185.7 44.5 143.8 60.5 47.8
6 356 222.3 215.9 47.8 170.7 66.5 50.8
8 419 273.1 269.7 55.6 221.5 76.2 57.2
10 508 342.9 323.9 63.5 276.4 85.9 65.0
12 559 400.1 381.0 66.5 327.2 91.9 69.9
14 603 431.8 412.8 69.9 359.2 93.7 73.2
16 686 495.3 469.9 76.2 410.5 106.4 77.7
18 743 546.1 533.4 82.6 461.8 117.3 79.2
20 813 609.6 584.2 88.9 513.1 127.0 82.6
24 940 717.6 692.2 101.6 616.0 139.7 91.9

 

Size Bolts 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

THREADED CLASS 900

Threaded flange dimensions class 900 in millimeters (ASME B16.5)

Size
inch		 D
mm		 X
mm		 G
mm		 t
mm		 B
mm		 T2
mm		 Q
mm
1/2 121 38.1 35.1 22.4 23.6 31.8 22.4
3/4 130 44.5 42.9 25.4 29.0 35.1 25.4
1 149 52.3 50.8 28.4 35.8 41.1 28.4
1¼ 159 63.5 63.5 28.4 44.5 41.1 30.2
1½ 178 69.9 73.2 31.8 50.5 44.5 31.8
2 216 104.6 91.9 38.1 63.5 57.2 38.1
2½ 244 124.0 104.6 41.1 76.2 63.5 47.8
3 241 127.0 127.0 38.1 92.2 53.8 41.1
4 292 158.8 157.2 44.5 117.6 69.9 47.8
5 349 190.5 185.7 50.8 144.5 79.2 53.8
6 381 235.0 215.9 55.6 171.5 85.9 57.2
8 470 298.5 269.7 63.5 222.3 101.6 63.5
10 546 368.3 323.9 69.9 276.4 108.0 71.4
12 610 419.1 381.0 79.2 328.7 117.3 76.2
14 641 450.9 412.8 85.9 360.4 130.0 82.6
16 705 508.0 469.9 88.9 411.2 133.4 85.9
18 787 565.2 533.4 101.6 462.0 152.4 88.9
20 857 622.3 584.2 108.0 512.8 158.8 91.9
24 1041 749.3 692.2 139.7 614.4 203.2 101.6

 

Size Bolts 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

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