ANSI B16.5 Flanges

Flanges are available as Weld Neck, Integral, Blinds, Targets and Test Blinds for use with the following pressure ratings:

Rating 150lb 300lb 400lb 600lb

Max. Working Pressure 285 PSI 740 PSI 990 PSI 1480 PSI

Test Pressure 450 PSI 1125 PSI 1500 PSI 2225 PSI

Operating Temperature Range

General Note: All Dimensions are in Inches

Class 150 Flanges

HU

B A

ND

BO

RE

DIM

EN

SIO

NS

-28 To +540 Deg C

-28 To +540 Deg C

-28 To +540 Deg C

-28 To +540 Deg C

Nominal Pipe Size

Outside Diameter of

Flange

Min. Thickness of Flange

Diameter of Hub

Hub Diameter Beginning of Chamfer at

Welding Neck

HU

B A

ND

BO

RE

DIM

EN

SIO

NS

D T A E1/2 3.50 0.44 1.19 0.843/4 3.88 0.50 1.50 1.051 4.25 0.56 1.94 1.32

1.1/4 4.62 0.62 2.31 1.661.1/2 5.00 0.69 2.56 1.90

2 6.00 0.75 3.06 2.382.1/2 7.00 0.88 3.56 2.88

3 7.50 0.94 4.25 3.503.1/2 8.50 0.94 4.81 4.00

4 9.00 0.94 5.31 4.505 10.00 0.94 6.44 5.566 11.00 1.00 7.56 6.638 13.50 1.12 9.69 8.63

10 16.00 1.19 12.00 10.7512 19.00 1.25 14.38 12.7514 21.00 1.38 15.75 14.0016 23.50 1.44 18.00 16.0018 25.00 1.56 19.88 18.0020 27.50 1.60 22.00 20.0024 32.00 1.88 26.12 24.00

Nominal Pipe Size

Outside Diameter of

Flange


Diameter of Hub


Welding Neck

Class 300 FlangesH

UB

AN

D B

OR

E D

IME

NS

ION

S

D T A E1/2 3.75 0.56 1.50 0.843/4 4.62 0.62 1.88 1.051 4.88 0.69 2.12 1.32

1.1/4 5.25 0.75 2.50 1.661.1/2 6.12 0.81 2.75 1.90

2 6.50 0.88 3.31 2.382.1/2 7.50 1.00 3.94 2.88

3 8.25 1.12 4.62 3.503.1/2 9.00 1.19 5.25 4.00

4 10.00 1.25 5.75 4.505 11.00 1.38 7.00 5.566 12.50 1.44 8.12 6.638 15.00 1.62 10.25 8.63

10 17.50 1.88 12.62 10.7512 20.50 2.00 14.75 12.7514 23.00 2.12 16.75 14.0016 25.50 2.25 19.00 16.0018 28.00 2.38 21.00 18.0020 30.50 2.50 23.12 20.0024 36.00 2.75 27.62 24.00

Nominal Pipe Size

Outside Diameter of

Flange


Diameter of Hub


Welding Neck

Class 400 Flanges

HU

B A

ND

BO

RE

DIM

EN

SIO

NS

D T A E1/2 3.75 0.56 1.50 0.843/4 4.62 0.62 1.88 1.051 4.88 0.69 2.12 1.32

1.1/4 5.25 0.81 2.50 1.661.1/2 6.12 0.88 2.75 1.90

2 6.50 1.00 3.31 2.382.1/2 7.50 1.12 3.94 2.88

3 8.25 1.25 4.62 3.503.1/2 9.00 1.38 5.25 4.00

4 10.00 1.38 5.75 4.505 11.00 1.50 7.00 5.566 12.50 1.62 8.12 6.638 15.00 1.88 10.25 8.63

10 17.50 2.12 12.62 10.7512 20.50 2.25 14.75 12.7514 23.00 2.38 16.75 14.0016 25.50 2.50 19.00 16.0018 28.00 2.62 21.00 18.0020 30.50 2.75 23.12 20.0024 36.00 3.00 27.62 24.00

Nominal Pipe Size

Outside Diameter of

Flange


Diameter of Hub


Welding Neck

Class 600 Flanges

HU

B A

ND

BO

RE

DIM

EN

SIO

NS

D T A E1/2 3.75 0.56 1.50 0.843/4 4.62 0.62 1.88 1.051 4.88 0.69 2.12 1.32

1.1/4 5.25 0.81 2.50 1.661.1/2 6.12 0.88 2.75 1.90

2 6.50 1.00 3.31 2.382.1/2 7.50 1.12 3.94 2.88

3 8.25 1.25 4.62 3.503.1/2 9.00 1.38 5.25 4.00

4 10.75 1.50 6.00 4.505 13.00 1.75 7.44 5.566 14.00 1.88 8.75 6.638 16.50 2.19 10.75 8.63

10 20.00 2.50 13.50 10.7512 22.00 2.62 15.75 12.7514 23.75 2.75 17.00 14.0016 27.00 3.00 19.50 16.0018 29.25 3.25 21.50 18.0020 32.00 3.50 24.00 20.0024 37.00 4.00 28.25 24.00

Nominal Pipe Size

Outside Diameter of

Flange


Diameter of Hub


Welding Neck

Class 900 Flanges

HU

B A

ND

BO

RE

DIM

EN

SIO

NS

D T A E1/2 4.75 0.88 1.50 0.843/4 5.12 1.00 1.75 1.051 5.88 1.12 2.06 1.32

1.1/4 6.25 1.12 2.50 1.661.1/2 7.00 1.25 2.75 1.90

2 8.50 1.50 4.12 2.382.1/2 9.62 1.62 4.88 2.88

3 9.50 1.50 5.00 3.504 11.50 1.75 6.25 4.505 13.75 2.00 7.50 5.566 15.00 2.19 9.25 6.638 18.50 2.50 11.75 8.63

10 21.50 2.75 14.50 10.7512 24.00 3.12 16.50 12.7514 25.25 3.38 17.75 14.0016 27.75 3.50 20.00 16.0018 31.00 4.00 22.25 18.0020 33.75 4.25 24.50 20.0024 41.00 5.50 29.50 24.00

Nominal Pipe Size

Outside Diameter of

Flange


Diameter of Hub


Welding Neck

Class 1500 Flanges

HU

B A

ND

BO

RE

DIM

EN

SIO

NS

D T A E1/2 4.75 0.88 1.50 0.843/4 5.12 1.00 1.75 1.051 5.88 1.12 2.06 1.32

1.1/4 6.25 1.12 2.50 1.661.1/2 7.00 1.25 2.75 1.90

2 8.50 1.50 4.12 2.382.1/2 9.62 1.62 4.88 2.88

3 10.50 1.88 5.25 3.504 12.25 2.12 6.38 4.505 14.75 2.88 7.75 5.566 15.50 3.25 9.00 6.638 19.00 3.62 11.50 8.63

10 23.00 4.25 14.50 10.7512 26.50 4.88 17.75 12.7514 29.50 5.25 19.50 14.0016 32.50 5.75 21.75 16.0018 36.00 6.38 23.50 18.0020 38.75 7.00 25.25 20.0024 46.00 8.00 30.00 24.00

Nominal Pipe Size

Outside Diameter of

Flange


Diameter of Hub


Welding Neck

Class 2500 Flanges

HU

B A

ND

BO

RE

DIM

EN

SIO

NS D T A E

1/2 5.25 1.19 1.69 0.843/4 5.50 1.25 2.00 1.051 6.25 1.38 2.25 1.32

1.1/4 7.25 1.50 2.88 1.661.1/2 8.00 1.75 3.12 1.90

2 9.25 2.00 3.75 2.382.1/2 10.50 2.25 4.50 2.88

3 12.00 2.62 5.25 3.504 14.00 3.00 6.50 4.505 16.50 3.62 8.00 5.566 19.00 4.25 9.25 6.638 21.75 5.00 12.00 8.63

10 26.50 6.50 14.75 10.7512 30.00 7.25 17.38 12.75

Nominal Pipe Size

Outside Diameter of

Flange


Diameter of Hub


Welding Neck


900lb 1,500lb 2,500lb

2220 PSI 3705 PSI 6170 PSI

3350 PSI 5575 PSI 9275 PSI

Class 150 Flanges

Number of Bolts

-28 To +540 Deg C

-28 To +540 Deg C

-28 To +540 Deg C

Welding Neck Length Through

Hub

Welding Neck Bore

Diameter of Bolt Hole Cirlcle

Diameter of Bolt Holes

Diameter of Bolts

Number of Bolts

L B P1.88 0.62 2.38 0.62 4 1/22.06 0.82 2.75 0.62 4 1/22.19 1.05 3.12 0.62 4 1/22.25 1.38 3.50 0.62 4 1/22.44 1.61 3.88 0.62 4 1/22.50 2.07 4.75 0.75 4 5/82.75 2.47 5.50 0.75 4 5/82.75 3.07 6.00 0.75 4 5/82.81 3.55 7.00 0.75 8 5/83.00 4.03 7.50 0.75 8 5/83.50 5.05 8.50 0.88 8 3/43.50 6.07 9.50 0.88 8 3/44.00 7.98 11.75 0.88 8 3/44.00 10.02 14.25 1.00 12 7/84.50 12.00 17.00 1.00 12 7/85.00 18.75 1.12 12 15.00 21.25 1.12 16 15.50 22.75 1.25 16 1.1/85.69 25.00 1.25 20 1.1/86.00 29.50 1.38 20 1.1/4


Hub

Welding Neck Bore



Diameter of Bolts

To be Specified by Purchaser

Class 300 Flanges

Number of Bolts

L B P2.06 0.62 2.62 0.62 4 1/22.25 0.82 3.25 0.75 4 5/82.44 1.05 3.50 0.75 4 5/82.56 1.38 3.88 0.75 4 5/82.69 1.61 4.50 0.88 4 3/42.75 2.07 5.00 0.75 8 5/83.00 2.47 5.88 0.88 8 3/43.12 3.07 6.62 0.88 8 3/43.19 3.55 7.25 0.88 8 3/43.38 4.03 7.88 0.88 8 3/43.88 5.05 9.25 0.88 8 3/43.88 6.07 10.62 0.88 12 3/44.38 7.98 13.00 1.00 12 7/84.62 10.02 15.25 1.12 16 15.12 12.00 17.75 1.25 16 1.1/85.62 12.00 20.25 1.25 20 1.1/85.75 22.50 1.38 20 1.1/46.25 24.75 1.38 24 1.1/46.38 27.00 1.38 24 1.1/46.62 32.00 1.62 24 1.1/2


Hub

Welding Neck Bore



Diameter of Bolts


Class 400 Flanges

Number of Bolts

L B P2.06 2.62 0.62 4 1/22.25 3.25 0.75 4 5/82.44 3.50 0.75 4 5/82.62 3.88 0.75 4 5/82.75 4.50 0.88 4 3/42.88 5.00 0.75 8 5/83.12 5.88 0.88 8 3/43.25 6.62 0.88 8 3/43.38 7.25 1.00 8 7/83.50 7.88 1.00 8 7/84.00 9.25 1.00 8 7/84.06 10.62 1.00 12 7/84.62 13.00 1.12 12 14.88 15.25 1.25 16 1.1/85.38 17.75 1.38 16 1.1/45.88 20.25 1.38 20 1.1/46.00 22.50 1.50 20 1.3/86.50 24.75 1.50 24 1.3/86.62 27.00 1.62 24 1.1/26.88 32.00 1.88 24 1.3/4


Hub

Welding Neck Bore



Diameter of Bolts


Class 600 Flanges

Number of Bolts

L B P2.06 2.62 0.62 4 1/22.25 3.25 0.75 4 5/82.44 3.50 0.75 4 5/82.62 3.88 0.75 4 5/82.75 4.50 0.88 4 3/42.88 5.00 0.75 8 5/83.12 5.88 0.88 8 3/43.25 6.62 0.88 8 3/43.38 7.25 1.00 8 7/84.00 8.50 1.00 8 7/84.50 10.50 1.12 8 14.62 11.50 1.12 12 15.25 13.75 1.25 12 1.1/86.00 17.00 1.38 16 1.1/46.12 19.25 1.38 20 1.1/46.50 20.75 1.50 20 1.3/87.00 23.75 1.62 20 1.1/27.25 25.75 1.75 20 1.5/87.50 28.50 1.75 24 1.5/88.00 33.00 2.00 24 1.7/8


Hub

Welding Neck Bore



Diameter of Bolts


Class 900 Flanges

Number of Bolts

L B P2.38 3.25 0.88 4 3/42.75 3.50 0.88 4 3/42.88 4.00 1.00 4 7/82.88 4.38 1.00 4 7/83.25 4.88 1.12 4 14.00 6.50 1.00 8 7/84.12 7.50 1.12 8 14.00 7.50 1.00 8 7/84.50 9.25 1.25 8 1.1/85.00 11.00 1.38 8 1.1/45.50 12.50 1.25 12 1.1/86.38 15.50 1.50 12 1.3/87.25 18.50 1.50 16 1.3/87.88 21.00 1.50 20 1.3/88.38 22.00 1.62 20 1.1/28.50 24.25 1.75 20 1.5/89.00 27.00 2.00 20 1.7/89.75 29.50 2.12 20 2

11.50 35.50 2.62 20 2.1/2


Hub

Welding Neck Bore



Diameter of Bolts


Class 1500 Flanges

Number of Bolts

L B P2.38 3.25 0.88 4 3/42.75 3.50 0.88 4 3/42.88 4.00 1.00 4 7/82.88 4.38 1.00 4 7/83.25 4.88 1.12 4 14.00 6.50 1.00 8 7/84.12 7.50 1.12 8 14.62 8.00 1.25 8 1.1/84.88 9.50 1.38 8 1.1/46.12 11.50 1.62 8 1.1/26.75 12.50 1.50 12 1.3/88.38 15.50 1.75 12 1.5/8

10.00 19.00 2.00 12 1.7/811.12 22.50 2.12 16 211.75 25.00 2.38 16 2.1/412.25 27.75 2.62 16 2.1/212.88 30.50 2.88 16 2.3/414.00 32.75 3.12 16 316.00 39.00 3.62 16 3.1/2


Hub

Welding Neck Bore



Diameter of Bolts


Class 2500 Flanges

Number of Bolts

L B P2.88 3.50 0.88 4 3/43.12 3.75 0.88 4 3/43.50 4.25 1.00 4 7/83.75 5.12 1.12 4 14.38 5.75 1.25 4 1.1/85.00 6.75 1.12 8 15.62 7.75 1.25 8 1.1/86.62 9.00 1.38 8 1.1/47.50 10.75 1.62 8 1.1/29.00 12.75 1.88 8 1.3/4

10.75 14.50 2.12 8 212.50 17.25 2.12 12 216.50 21.25 2.62 12 2.1/218.25 24.38 2.88 12 2.3/4


Hub

Welding Neck Bore



Diameter of Bolts



Class 150 Flanges

Length of Raised Face

2.25 -2.50 -2.50 3.002.75 3.252.75 3.253.25 3.753.50 4.003.50 4.003.50 4.003.50 4.003.75 4.254.00 4.504.25 4.754.50 5.004.75 5.255.25 5.755.25 5.755.75 6.256.25 6.756.75 7.25

Diameter of Raised Face

Total Thickness of Flange

Class 300 Flanges


2.50 3.003.00 3.503.00 3.503.25 3.753.50 4.003.50 4.004.00 4.504.25 4.754.25 4.754.50 5.004.75 5.254.75 5.255.50 6.006.25 6.756.75 7.257.00 7.507.50 8.007.75 8.258.00 8.759.00 10.00



Class 400 Flanges


3.00 3.003.50 3.503.50 3.503.75 3.754.25 4.254.25 4.254.75 4.755.00 5.005.50 5.505.50 5.505.75 5.756.00 6.006.75 6.757.50 7.508.00 8.008.25 8.258.75 8.759.00 9.009.50 9.75

10.50 11.00



Class 600 Flanges


3.00 3.003.50 3.503.50 3.503.75 3.754.25 4.254.25 4.254.75 4.755.00 5.005.50 5.505.75 5.756.50 6.506.75 6.757.50 7.508.50 8.508.75 8.759.25 9.25

10.00 10.0010.75 10.7511.25 11.5013.00 13.25



Class 900 Flanges


4.25 4.254.50 4.505.00 5.005.00 5.005.50 5.505.75 5.756.25 6.255.75 5.756.75 6.757.50 7.507.50 7.508.75 8.759.25 9.25

10.00 10.0010.75 11.0011.25 11.5012.75 13.2513.75 14.2517.25 18.00



Class 1500 Flanges


4.25 4.254.50 4.505.00 5.005.00 5.005.50 5.505.75 5.756.25 6.257.00 7.007.75 7.759.75 9.75

10.25 10.5011.50 11.7513.25 13.5014.75 15.2516.00 16.7517.50 18.5019.50 20.7521.25 22.2524.25 25.50



Class 2500 Flanges


4.75 4.755.00 5.005.50 5.506.00 6.006.75 6.757.00 7.007.75 8.008.75 9.00

10.00 10.2511.75 12.2513.50 14.0015.00 15.5019.25 20.0021.25 22.00



Documents

ANSI B16.5 Flanges