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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)

Threaded Flange Dimensions ASME B16.5

FLANGE
NPS
Inside
Diameter
Outside
Diameter
Bolt Circle (BC)Raised Face (R)Raised Face (RF)HRaised Face Thickness (T)T1Flat 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)

Threaded Flange Dimensions ASME B16.5

FLANGE
NPS
Inside
Diameter
Outside
Diameter
Bolt Circle (BC)Raised Face (R)Raised Face (RF)HRaised Face Thickness (T)T1Flat 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)

Threaded Flange Dimensions ASME B16.5

FLANGE
NPS
Inside
Diameter
Outside
Diameter
Bolt Circle (BC)Raised Face (R)Raised Face (RF)HRaised Face Thickness (T)T1Flat 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)

Threaded Flange Dimensions ASME B16.5

FLANGE
NPS
Inside
Diameter
Outside
Diameter
Bolt Circle (BC)Raised Face (R)Raised Face (RF)HRaised Face Thickness (T)T1Flat 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)

Threaded Flange Dimensions ASME B16.5

FLANGE
NPS
Inside
Diameter
Outside
Diameter
Bolt Circle (BC)Raised Face (R)Raised Face (RF)HRaised Face Thickness (T)T1Flat 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)

Threaded Flange Dimensions ASME B16.5

FLANGE
NPS
Inside
Diameter
Outside
Diameter
Bolt Circle (BC)Raised Face (R)Raised Face (RF)HRaised Face Thickness (T)T1Flat 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)

Threaded Flange Dimensions ASME B16.5

FLANGE
NPS
Inside
Diameter
Outside
Diameter
Bolt Circle (BC)Raised Face (R)Raised Face (RF)HRaised Face Thickness (T)T1Flat 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)

Threaded flange dimension

Size
inch
D
mm
X
mm
G
mm
t
mm
T2
mm
Q
mm
1/28930.235.111.215.715.7
3/49938.142.912.715.715.7
110849.350.814.217.517.5
11758.763.515.720.620.6
12765.073.217.522.422.4
215277.791.919.125.425.4
17890.4104.622.428.428.4
3191108.0127.023.930.230.2
216122.2139.723.931.831.8
4229134.9157.223.933.333.3
5254163.6185.723.936.636.6
6279192.0215.925.439.639.6
8343246.1269.728.444.544.5
10406304.8323.930.249.349.3
12483365.3381.031.855.655.6
14533400.1412.835.157.257.2
16597457.2469.936.663.563.5
18635505.0533.439.668.368.3
20699558.8584.242.973.273.2
24813663.4692.247.882.682.6

 

SizeBolts DrillingBolting Requirements
inchBolt circle
Diameter mm
Holes #Holes Dia. mmBolt Dia. inch.Length
FF Flange
Length
RF Flange
Length
RTJ Flange
1/260.5415.71/250.857.2
3/469.9415.71/250.863.5
179.2415.71/257.263.576.2
88.9415.71/257.269.982.6
98.6415.71/263.569.982.6
2120.7419.15/869.982.695.3
139.7419.15/876.288.9101.6
3152.4419.15/876.288.9101.6
177.8819.15/876.288.9101.6
4190.5819.15/876.288.9101.6
5215.9822.43/482.695.3108.0
6241.3822.43/482.6101.6114.3
8298.5822.43/488.9108.0120.7
10362.01225.47/8101.6114.3127.0
12431.81225.47/8101.6120.7133.4
14476.31228.41114.3133.4146.1
16539.81628.41114.3133.4146.1
18577.91631.811/8127.0146.1158.8
20635.02031.811/8139.7158.8171.5
24749.32035.1152.4171.5184.2

THREADED CLASS 300

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

Threaded flange dimension

Size
inch
D
mm
X
mm
G
mm
t
mm
B
mm
T2
mm
Q
mm
1/29538.135.114.223.622.415.7
3/411747.842.915.729.025.415.7
112453.850.817.535.826.917.5
13363.563.519.144.526.920.6
15569.973.220.650.530.222.4
216584.191.922.463.533.328.4
191100.1104.625.476.238.131.8
3210117.3127.028.492.242.931.8
229133.4139.730.2104.944.536.6
4254146.1157.231.8117.647.836.6
5279177.8185.735.1144.550.842.9
6318206.2215.936.6171.552.346.0
8381260.4269.741.1222.362.050.8
10445320.5323.947.8276.466.555.6
12521374.7381.050.8328.773.260.5
14584425.5412.863.8360.476.263.5
16648482.6469.957.2411.282.668.3
18711533.4533.460.5462.088.969.9
20775587.2584.263.5512.895.373.2
24914701.5692.269.9614.4106.482.6

 

SizeBolts DrillingBolting Requirements
inchBolt circle
Diameter mm
Holes #Holes Dia. mmBolt Dia. inch.Length
FF Flange
Length
RF Flange
Length
RTJ Flange
1/266.5415.71/257.263.576.2
3/482.6419.15/863.576.288.9
188.9419.15/863.576.288.9
98.6419.15/869.982.695.3
114.3422.43/476.288.9101.6
2127.0819.15/876.288.9101.6
149.4822.43/482.6101.6114.3
3168.1822.43/488.9108.0120.7
184.2822.43/495.3108.0127.0
4200.2822.43/495.3114.3127.0
5235.0822.43/4108.0120.7133.4
6269.71222.43/4108.0120.7139.7
8330.21225.47/8120.7139.7152.4
10387.41628.41139.7158.8171.5
12450.91631.811/8146.1171.5184.2
14514.42031.811/8158.8177.8190.5
16571.52035.1165.1190.5203.2
18628.72435.1171.5196.9209.6
20685.82435.1184.2203.2222.3
24812.82441.1203.2228.6254.0

THREADED CLASS 600

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

Threaded flange dimension

Size
inch
D
mm
X
mm
G
mm
t
mm
B2
mm
T2
mm
Q
mm
1/29538.135.114.222.422.415.7
3/411747.842.915.727.725.415.7
112453.850.817.534.526.917.5
13363.563.520.643.228.420.6
15569.973.222.449.531.822.4
216584.191.925.462.036.628.4
191100.1104.628.474.741.131.8
3210117.3127.031.890.746.035.1
229133.4139.735.1103.449.339.6
4273152.4157.238.1116.153.841.1
5330189.0185.744.5143.860.547.8
6356222.3215.947.8170.766.550.8
8419273.1269.755.6221.576.257.2
10508342.9323.963.5276.485.965.0
12559400.1381.066.5327.291.969.9
14603431.8412.869.9359.293.773.2
16686495.3469.976.2410.5106.477.7
18743546.1533.482.6461.8117.379.2
20813609.6584.288.9513.1127.082.6
24940717.6692.2101.6616.0139.791.9

 

SizeBolts DrillingBolting Requirements
inchBolt circle
Diameter mm
Holes #Holes Dia. mmBolt Dia. inch.Length
FF Flange
Length
RF Flange
Length
RTJ Flange
1/266.5415.71/276.269.976.2
3/482.6419.15/888.982.688.9
188.9419.15/888.982.688.9
98.6419.15/895.388.995.3
114.3422.43/4108.0101.6108.0
2127.0819.15/8108.0101.6108.0
149.4822.43/4120.7114.3120.7
3168.1822.43/4127.0120.7127.0
184.2825.47/8139.7133.4139.7
4215.9825.47/8146.1139.7146.1
5266.7828.41165.1158.8165.1
6292.11228.41171.5165.1171.5
8349.31231.811/8190.5184.2196.9
10431.81635.1215.9209.6215.9
12489.02035.1222.3215.9222.3
14527.12038.113/8235.0228.6235.0
16603.32041.1254.0247.7254.0
18654.12044.515/8273.1266.7273.1
20723.92444.515/8285.8279.4292.1
24838.22450.817/8330.2323.9336.6

THREADED CLASS 900

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

Threaded flange dimension

Size
inch
D
mm
X
mm
G
mm
t
mm
B
mm
T2
mm
Q
mm
1/212138.135.122.423.631.822.4
3/413044.542.925.429.035.125.4
114952.350.828.435.841.128.4
15963.563.528.444.541.130.2
17869.973.231.850.544.531.8
2216104.691.938.163.557.238.1
244124.0104.641.176.263.547.8
3241127.0127.038.192.253.841.1
4292158.8157.244.5117.669.947.8
5349190.5185.750.8144.579.253.8
6381235.0215.955.6171.585.957.2
8470298.5269.763.5222.3101.663.5
10546368.3323.969.9276.4108.071.4
12610419.1381.079.2328.7117.376.2
14641450.9412.885.9360.4130.082.6
16705508.0469.988.9411.2133.485.9
18787565.2533.4101.6462.0152.488.9
20857622.3584.2108.0512.8158.891.9
241041749.3692.2139.7614.4203.2101.6

 

SizeBolts DrillingBolting Requirements
inchBolt circle
Diameter mm
Holes #Holes Dia. mmBolt Dia. inch.Length
FF Flange
Length
RF Flange
Length
RTJ Flange
1/282.6422.43/4108.0101.6108.0
3/488.9422.43/4114.3108.0114.3
1101.6425.47/8127.0120.7127.0
111.3425.47/8127.0120.7127.0
124.0428.41139.7133.4139.7
2165.1825.47/8146.1139.7146.1
190.5828.41158.8152.4158.8
3190.5825.47/8146.1139.7146.1
4235.0831.811/8171.5165.1171.5
5279.4835.1190.5184.2190.5
6317.51231.811/8190.5184.2196.9
8393.71238.113/8222.3215.9222.3
10469.91638.113/8235.0228.6235.0
12533.42038.113/8254.0247.7254.0
14558.82041.1273.1266.7292.1
16616.02044.515/8285.8279.4298.5
18685.82050.817/8323.9317.5333.6
20749.32053.82349.3342.9362.0
24901.72066.5438.2431.8457.2

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ANSI Y-Strainers

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SIZES       ⅜” to 12″
RATINGS 150# · 300# · 600# · 800#
GRADES  Carbon · Stainless
ENDS        Flanged RF · BW · THD · SW