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

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

BLIND FLANGE DIMENSIONS IN INCHES

BLIND CLASS 150 (IN INCH)

Blind flange dimensions class 150 in inches

Blind Flange Dimension ASME B16.5

FLANGE
NPS
Outside
Diameter
Bolt Circle (BC) Raised Face (R) Raised Face (RF) Raised Face
Thickness (T)
Flat Face
Thickness (T2)
Bolt Hole (B) No. of
Bolt Holes
1/2″ 3.50″ 2.38″ 1.38″ .063″ .44″ .38″ .62″ 4
3/4″ 3.88″ 2.75″ 1.69″ .063″ .50″ .44″ .62″ 4
1″ 4.25″ 3.12″ 2.00″ .063″ .56″ .50″ .62″ 4
1-1/4″ 4.62″ 3.50″ 2.50″ .063″ .62″ .56″ .62″ 4
1-1/2″ 5.00″ 3.88″ 2.88″ .063″ .68″ .62″ .62″ 4
2″ 6.00″ 4.75″ 3.62″ .063″ .75″ .69″ .75″ 4
2-1/2″ 7.00″ 5.50″ 4.12″ .063″ .88″ .82″ .75″ 4
3″ 7.50″ 6.00″ 5.00″ .063″ .94″ .88″ .75″ 4
3-1/2″ 8.50″ 7.00″ 5.50″ .063″ .94″ .88″ .75″ 8
4″ 9.00″ 7.50″ 6.19″ .063″ .94″ .88″ .75″ 8
5″ 10.00″ 8.50″ 7.31″ .063″ .94″ .88″ .88″ 8
6″ 11.00″ 9.50″ 8.50″ .063″ 1.00″ .94″ .88″ 8
8″ 13.50″ 11.75″ 10.62″ .063″ 1.12″ 1.06″ .88″ 8
10″ 16.00″ 14.25″ 12.75″ .063″ 1.19″ 1.13″ 1.00″ 12
12″ 19.00″ 17.00″ 15.00″ .063″ 1.25″ 1.19″ 1.00″ 12
14″ 21.00″ 18.75″ 16.25″ .063″ 1.38″ 1.32″ 1.12″ 12
16″ 23.50″ 21.25″ 18.50″ .063″ 1.44″ 1.38″ 1.12″ 16
18″ 25.00″ 22.75″ 21.00″ .063″ 1.56″ 1.50″ 1.25″ 16
20″ 27.50″ 25.00″ 23.00″ .063″ 1.69″ 1.63″ 1.25″ 20
22″ 29.50″ 27.25″ 25.25″ .063″ 1.81″ 1.75″ 1.38″ 20
24″ 32.00″ 29.50″ 27.25″ .063″ 1.88″ 1.82″ 1.38″ 20

BLIND CLASS 300 (IN INCH)

Blind flange dimensions class 300 in inches

Blind Flange Dimension ASME B16.5

FLANGE
NPS
Outside
Diameter
Bolt Circle (BC) Raised Face (R) Raised Face (RF) Raised Face
Thickness (T)
Flat Face
Thickness (T2)
Bolt Hole (B) No. of
Bolt Holes
1/2″ 3.75″ 2.62″ 1.38″ .063″ 0.56″ 0.50″ 0.62″ 4
3/4″ 4.62″ 3.25″ 1.69″ .063″ 0.62″ .056″ 0.75″ 4
1″ 4.88″ 3.50″ 2.00″ .063″ 0.69″ 0.63″ 0.75″ 4
1-1/4″ 5.25″ 3.88″ 2.50″ .063″ 0.75″ 0.69″ 0.75″ 4
1-1/2″ 6.12″ 4.50″ 2.88″ .063″ 0.81″ 0.75″ 0.88″ 4
2″ 6.50″ 5.00″ 3.62″ .063″ 0.88″ 0.82″ 0.75″ 8
2-1/2″ 7.50″ 5.88″ 4.12″ .063″ 1.00″ 0.94″ 0.88″ 8
3″ 8.25″ 6.62″ 5.00″ .063″ 1.12″ 1.06″ 0.88″ 8
3-1/2″ 9.00″ 7.25″ 5.50″ .063″ 1.19″ 1.13″ 0.88″ 8
4″ 10.00″ 7.88″ 6.19″ .063″ 1.25″ 1.19″ 0.88″ 8
5″ 11.00″ 9.25″ 7.31″ .063″ 1.38″ 1.32″ 0.88″ 8
6″ 12.50″ 10.62″ 8.50″ .063″ 1.44″ 1.38″ 0.88″ 12
8″ 15.00″ 13.00″ 10.62″ .063″ 1.62″ 1.56″ 1.00″ 12
10″ 17.50″ 15.25″ 12.75″ .063″ 1.88″ 1.82″ 1.12″ 16
12″ 20.50″ 17.75″ 15.00″ .063″ 2.00″ 1.94″ 1.25″ 16
14″ 23.00″ 20.25″ 16.25″ .063″ 2.12″ 2.06″ 1.25″ 20
16″ 25.50″ 22.50″ 18.50″ .063″ 2.25″ 2.19″ 1.38″ 20
18″ 28.00″ 24.75″ 21.00″ .063″ 2.38″ 2.32″ 1.38″ 24
20″ 30.50″ 27.00″ 23.00″ .063″ 2.50″ 2.44″ 1.38″ 24
22″ 33.00″ 29.25″ 25.25″ .063″ 2.63″ 2.57″ 1.63″ 24
24″ 36.00″ 32.00″ 27.25″ .063″ 2.75″ 2.69″ 1.62″ 24

BLIND CLASS 400 (IN INCH)

Blind flange dimensions class 400 in inches

Blind Flange Dimension ASME B16.5

FLANGE
NPS
Outside
Diameter
Bolt Circle (BC) Raised Face (R) Raised Face (RF) Raised Face
Thickness (T)
Flat Face
Thickness (T2)
Bolt Hole (B) No. of
Bolt Holes
1/2″ 3.75″ 2.62″ 0.12″ .250″ 0.81″ 0.56″ 0.62″ 4
3/4″ 4.62″ 3.25″ 0.12″ .250″ 0.87″ 0.62″ 0.75″ 4
1″ 4.88″ 3.50″ 0.12″ .250″ 0.94″ 0.69″ 0.75″ 4
1-1/4″ 5.25″ 3.88″ 0.19″ .250″ 1.06″ 0.81″ 0.75″ 4
1-1/2″ 6.12″ 4.50″ 0.25″ .250″ 1.13″ 0.88″ 0.88″ 4
2″ 6.50″ 5.00″ 0.31″ .250″ 1.25″ 1.00″ 0.75″ 8
2-1/2″ 7.50″ 5.88″ 0.31″ .250″ 1.37″ 1.12″ 0.88″ 8
3″
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