Weld Neck Flange or welding neck flange can be differentiated from all other types of flange by their long tapered hub. In addition, there is also a gentle transition of thickness in the region of the butt weld that joins them to pipe or a fitting.
Weld Neck flanges or welding neck flanges are best suited for severe service conditions, whether loading conditions are substantially constant or fluctuate between wide limits.

Weld Neck Flanges are flanges with the wall thickness of the flange having the same dimensions of the matching pipe, the lighter the pipe is, the larger the bore, conversely, the heavier the pipe, the smaller the bore, they are normally used for high pressure, cold or hot temperature.

Dimensions Weld Neck Flanges, ANSI CLASS 75, INDUSTRY STANDARD, 1/16″ RAISED FACE (IN) DATASHEET

  • Industry Standard Flanges have no national standard code or are they covered by any governing body.
  • Bolt circle diameters are 1/8 inch larger than bolt diameter.

data wnf b16.5 150 300data wnf b16.47

Pipe Size

(NPS)

Outside Diameter of Flange

A

Diameter of Raised Face

B

Thickness of Flange

C

Diameter of Bore

D

Diameter of Hub at Weld

H

Diameter of Hub at Base

J

Length of Hub

K

Number of Bolt Holes

 

Diameter of Bolt Holes

 

Bolt Circle Diameter

P

Approx. Weight

(lb)

26 31 1/2 28 5/8 1 1/4 * 26 27 1/8 3 32 1 29 5/8 98
28 33 1/2 30 5/8 1 1/4 * 28 29 1/8 3 36 1 31 5/8 105
30 35 1/2 32 5/8 1 1/4 * 30 31 1/8 3 36 1 33 5/8 110
32 38 1/4 35 1 1/4 * 32 33 3/8 3 1/4 36 1 1/8 36 1/8 140
34 40 1/4 37 1 1/4 * 34 35 3/8 3 1/4 40 1 1/8 38 1/8 150
36 42 1/4 39 1 1/4 * 36 37 3/8 3 1/4 40 1 1/8 40 1/8 160
42 49 45 1/2 1 1/4 * 42 43 3/4 3 1/2 48 1 1/4 46 3/4 210
48 55.00 51 1/2 1 1/4 * 48 49 3/4 3 3/4 52 1 1/4 52 3/4 240
54 61 1/4 57 3/4 1 1/4 * 54 56 4 64 1 1/4 59 310
60 67 1/4 63 3/4 1 1/4 * 60 62 4 3/8 72 1 1/4 65 400
66 74 70 1/8 1 3/8 * 66 68 4 7/8 72 1 3/8 71 1/2 560
72 80 76 1/8 1 5/8 * 72 74 5 1/4 80 1 3/8 77 1/2 700

Dimensions Weld Neck Flanges, ANSI CLASS 150, ASME B16.47 SERIES A, 1/16″ RAISED FACE (IN)

  • Dimensions to ASME B16.47 – Large Diameter Steel Flanges: NPS 26 Through NPS 60 Metric/Inch Standard
  • Bolt circle diameters are 1/8 inch larger than bolt diameter.

data wnf b16.5 400 2500data wnf b16.47

Pipe Size

(NPS)

Outside Diameter of Flange

A

Diameter of Raised Face

B

Thickness of Flange

C

Diameter of Bore

D

Diameter of Hub at Weld

H

Diameter of Hub at Base

J

Length of Hub

K

Number of Bolt Holes

 

Diameter of Bolt Holes

 

Bolt Circle Diameter

P

Approx. Weight

(lb)

26 34 1/4 29 1/2 2 11/16 * 26 26 5/8 4 3/4 24 1 3/8 31 3/4 300
28 36 1/2 31 1/2 2 13/16 * 28 28 5/8 4 15/16 28 1 3/8 34 345
30 38 3/4 33 3/4 2 15/16 * 30 30 3/4 5 3/8 28 1 3/8 36 400
32 41 3/4 36 3 3/16 * 32 32 3/4 5 11/16 28 1 5/8 38 1/2 505
34 43 3/4 38 3 1/4 * 34 34 3/4 5 7/8 32 1 5/8 40 1/2 540
36 46 40 1/4 3 9/16 * 36 36 3/4 6 3/16 32 1 5/8 42 3/4 640
38 48 3/4 42 1/4 3 7/16 * 38 39 6 3/16 32 1 5/8 45 1/4 720
40 50 3/4 44 1/4 3 9/16 * 40 41 6 7/16 36 1 5/8 47 1/4 775
42 53 47 3 13/16 * 42 43 6 3/4 36 1 5/8 49 1/2 890
44 55 1/4 49 4 * 44 45 7 40 1 5/8 51 3/4 990
46 57 1/4 51 4 1/16 * 46 47 1/8 7 5/16 40 1 5/8 53 1/4 1060
48 59 1/2 53 1/2 10 1/4 * 48 49 1/8 7 9/16 44 1 5/8 56 1185
50 61 3/4 55 1/2 4 3/8 * 50 51 1/4 8 44 1 7/8 58 1/4 1270
52 64 57 1/2 4 9/16 * 52 53 1/4 8 1/4 44 1 7/8 60 1/2 1410
54 66 1/4 59 1/2 4 3/4 * 54 55 1/4 8 1/2 44 1 7/8 62 3/4 1585
56 68 3/4 62 4 7/8 * 56 57 3/8 9 48 1 7/8 65 1760
58 71 64 5 1/16 * 58 59 3/8 9 1/4 48 1 7/8 67 1/4 1915
60 73 66 5 3/16 * 60 61 3/8 9 7/16 52 1 7/8 69 1/4 2045

Dimensions Weld Neck Flanges, ANSI CLASS 150, ASME B16.5, 1/16″ RAISED FACE (IN)

This datasheet is for weld neck flanges that have a raised face connection.  Additional in depth information about these flanges can be found on the raised face page.

  • Dimensions to ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
  • Bolt circle diameters are 1/8 inch larger than bolt diameter.

data wnf b16.5 150 300data wnf b16.5

Pipe Size

(NPS)

Outside Diameter of Flange

A

Diameter of Raised Face

B

Thickness of Flange

C

Diameter of Bore

D

Diameter of Hub at Weld

H

Diameter of Hub at Base

J

Length of Hub

K

Number of Bolt Holes

 

Diameter of Bolt Holes

 

Bolt Circle Diameter

P

Approx. Weight

(lb)

1/2 3 1/2 1 3/8 7/16 0.622 0.840 1 3/16 1 7/8 4 5/8 2 3/8 2
3/4 3 7/8 1 11/16 1/2 0.824 1.050 1 1/2 2 1/16 4 5/8 2 3/4 2
1 4 1/4 2 9/16 1.049 1.315 1 15/16 2 3/16 4 5/8 3 1/8 2.5
1 1/4 4 5/8 2 1/2 5/8 1.380 1.660 2 5/16 2 1/4 4 5/8 3 1/2 2.5
1 1/2 5 2 7/8 11/16 1.610 1.900 2 9/16 2 7/16 4 5/8 3 7/8 4
2 6 3 5/8 3/4 2.067 2.375 3 1/16 2 1/2 4 3/4 4 3/4 6
2 1/2 7 4 1/8 7/8 2.469 2.875 3 9/16 2 3/4 4 3/4 5 1/2 10
3 7 1/2 5 15/16 3.068 3.500 4 1/4 2 3/4 4 3/4 6 11
3 1/2 8 1/2 5 1/2 15/16 3.548 4.00 4 13/16 2 13/16 8 3/4 7 12
4 9 6 3/16 15/16 4.026 4.500 5 5/16 3 8 3/4 7 1/2 15
5 10 7 5/16 15/16 5.047 5.563 6 7/16 3 1/2 8 7/8 8 1/2 19
6 11 8 1/2 1 6.065 6.625 7 9/16 3 1/2 8 7/8 9 1/2 24
8 13 1/2 10 5/8 1 1/8 7.981 8.625 9 11/16 4 8 7/8 11 3/4 39
10 16 12 3/4 1 3/16 10.020 10.750 12 4 12 1 14 1/4 52
12 19 15 1 1/4 12.00 12.750 14 3/8 4 1/2 12 1 17 80
14 21 16 1/4 1 3/8 13.25 14.00 15 3/4 5 12 1 1/8 18 3/4 120
16 23 1/2 18 1/2 1 7/16 15.25 16.00 18 5 16 1 1/8 21 1/4 127
18 25 21 1 9/16 17.25 18.00 19 7/8 5 1/2 16 1 1/4 22 3/4 140
20 27 1/2 23 1 11/16 19.25 20.00 22 5 11/16 20 1 1/4 25 170
22 29 1/2 25 1/4 1 13/16 21.25 22.00 24 5 7/8 20 1 3/8 27 1/4 224
24 32 27 1/4 1 7/8 23.25 24.00 26 1/8 6 20 1 3/8 29 1/2 260

Dimensions Weld Neck Flanges, ANSI CLASS 150, ASME B16.5, 1/16″ RING TYPE JOINT (IN)

  • Dimensions to ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
  • Bolt circle diameters are 1/8 inch larger than bolt diameter.

data wnf rjf b16.5 150 400Data rtj b16.5 150 2500data wnf rjf b16.5

Pipe Size

(NPS)

Outside Diameter of Flange

A

Thickness of Flange

C

Diameter of Bore

D

Diameter of Hub at Weld

H

Diameter of Hub at Base

J

Length of Hub

K

Diameter of Raised Face

T

Diameter of Groove

U

Groove Width

W

Groove Depth

X

Number of Bolt Holes

 

Diameter of Bolt Holes

 

Bolt Circle Diameter

P

1/2
3/4
1 4 1/4 1/2 1.049 1.315 1 15/16 2 3/16 2 1/2 1 7/8 11/32 1/4 4 5/8 3 1/8
1 1/4 4 5/8 9/16 1.380 1.660 2 5/16 2 1/4 2 7/8 2 1/4 11/32 1/4 4 5/8 3 1/2
1 1/2 5 5/8 1.610 1.900 2 9/16 2 7/16 3 1/4 2 9/16 11/32 1/4 4 5/8 3 7/8
2 6 11/16 2.067 2.375 3 1/16 2 1/2 4 3 1/4 11/32 1/4 4 3/4 4 3/4
2 1/2 7 13/16 2.469 2.875 3 9/16 2 3/4 4 3/4 4 11/32 1/4 4 3/4 5 1/2
3 7 1/2 7/8 3.068 3.500 4 1/4 2 3/4 5 1/4 4 1/2 11/32 1/4 4 3/4 6
3 1/2 8 1/2 7/8 3.548 4.00 4 13/16 2 13/16 6 1/16 5 3/16 11/32 1/4 8 3/4 7
4 9 7/8 4.026 4.500 5 5/16 3 6 3/4 5 7/8 11/32 1/4 8 3/4 7 1/2
5 10 7/8 5.047 5.563 6 7/16 3 1/2 7 5/8 6 3/4 11/32 1/4 8 7/8 8 1/2
6 11 15/16 6.065 6.625 7 9/16 3 1/2 8 5/8 7 5/8 11/32 1/4 8 7/8 9 1/2
8 13 1/2 1 1/16 7.981 8.625 9 11/16 4 10 3/4 9 3/4 11/32 1/4 8 7/8 11 3/4
10 16 1 1/8 10.020 10.750 12 4 13 12 11/32 1/4 12 1 14 1/4
12 19 1 3/16 12.00 12.750 14 3/8 4 1/2 16 15 11/32 1/4 12 1 17
14 21 1 5/16 13.25 14.00 15 3/4 5 16 3/4 15 5/8 11/32 1/4 12 1 1/8 18 3/4
16 23 1/2 1 3/8 15.25 16.00 18 5 19 17 7/8 11/32 1/4 16 1 1/8 21 1/4
18 25 1 1/2 17.25 18.00 19 7/8 5 1/2 21 1/2 20 3/8 11/32 1/4 16 1 1/4 22 3/4
20 27 1/2 1 5/8 19.25 20.00 22 5 11/16 23 1/2 22 11/32 1/4 20 1 1/4 25
22 29 1/2 1 3/4 21.25 22.00 24 5 7/8 25 1/2 24 1/4 11/32 1/4 20 1 3/8 27 1/4
24 32 1 13/16 23.25 24.00 26 1/8 6 28 26 1/2 11/32 1/4 20 1 3/8 29 1/2

Dimensions Weld Neck Flanges, ANSI CLASS 300, ASME B16.47 SERIES A, 1/16″ RAISED FACE (IN)

  • Dimensions to ASME B16.47 – Large Diameter Steel Flanges: NPS 26 Through NPS 60 Metric/Inch Standard
  • Bolt circle diameters are 1/8 inch larger than bolt diameter.

data wnf b16.5 400 2500data wnf b16.47

Pipe Size

(NPS)

Outside Diameter of Flange

A

Diameter of Raised Face

B

Thickness of Flange

C

Diameter of Bore

D

Diameter of Hub at Weld

H

Diameter of Hub at Base

J

Length of Hub

K

Number of Bolt Holes

 

Diameter of Bolt Holes

 

Bolt Circle Diameter

P

Approx. Weight

(lb)

26 38 1/4 29 1/2 3 1/8 * 26 28 3/8 7 1/4 28 1 3/4 34 1/2 605
28 40 3/4 31 1/2 3 9/16 * 28 30 1/2 7 3/4 28 1 3/4 37 745
30 43 33 3/4 3 3/4 * 30 32 9/16 8 1/4 28 1 7/8 39 1/4 870
32 45 1/4 36 3 15/16 * 32 34 11/16 8 3/4 28 2 41 1/2 1005
34 47 1/2 38 3 1/8 * 34 36 7/8 9 1/8 28 2 43 1/2 1145
36 50 40 1/4 3 3/8 * 36 39 9 1/2 32 2 1/8 46 1275
38 46 42 1/4 4 1/4 * 38 39 1/8 7 1/8 32 1 5/8 43 695
40 48 1/4 44 1/4 4 1/2 * 40 41 1/4 7 5/8 32 1 3/4 45 1/2 840
42 50 3/4 47 4 11/16 * 42 43 1/4 7 7/8 32 1 3/4 47 1/2 950
44 53 1/4 49 4 7/8 * 44 45 1/4 8 1/8 32 1 7/8 49 3/4 1055
46 55 3/4 51 5 1/16 * 46 47 3/8 8 1/2 28 2 52 1235
48 57 3/4 53 1/2 5 1/4 * 48 49 3/8 8 13/16 32 2 54 1380
50 60 1/4 55 1/2 5 1/2 * 50 51 3/8 9 1/8 32 2 1/8 56 1/4 1530
52 62 1/4 57 1/2 5 11/16 * 52 53 3/8 9 3/8 32 2 1/8 58 1/4 1660
54 65 1/4 59 1/2 6 * 54 55 1/2 9 15/16 28 2 3/8 61 2050
56 67 1/4 62 6 1/16 * 56 57 5/8 10 1/4 28 2 3/8 63 2155
58 69 1/4 64 6 1/4 * 58 59 5/8 10 1/2 32 2 3/8 65 2270
60 71 1/4 66 6 7/16 * 60 61 5/8 10 3/4 32 2 3/8 67 2470

Dimensions Weld Neck Flanges, ANSI CLASS 300, ASME B16.5, 1/16″ RAISED FACE (IN)

his datasheet is for weld neck flanges that have a raised face connection.  Additional in depth information about these flanges can be found on the raised face page.

  • Dimensions to ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
  • Bolt circle diameters are 1/8 inch larger than bolt diameter.

data wnf b16.5 150 300data wnf b16.5

Pipe Size

(NPS)

Outside Diameter of Flange

A

Diameter of Raised Face

B

Thickness of Flange

C

Diameter of Bore

D

Diameter of Hub at Weld

H

Diameter of Hub at Base

J

Length of Hub

K

Number of Bolt Holes

 

Diameter of Bolt Holes

 

Bolt Circle Diameter

P

Approx. Weight

(lb)

1/2 3 3/4 1 3/8 9/16 0.622 0.840 1 1/2 2 1/16 4 5/8 2 5/8 2
3/4 4 5/8 1 11/16 5/8 0.824 1.050 1 7/8 2 1/4 4 3/4 3 1/4 3
1 4 7/8 2 11/16 1.049 1.315 2 1/8 2 7/16 4 3/4 3 1/2 4
1 1/4 5 1/4 2 1/2 3/4 1.380 1.660 2 1/2 2 9/16 4 3/4 3 7/8 6
1 1/2 6 1/8 2 7/8 13/16 1.610 1.900 2 3/4 2 11/16 4 7/8 4 1/2 8
2 6 1/2 3 5/8 7/8 2.067 2.375 3 5/16 2 3/4 8 3/4 5 9
2 1/2 7 1/2 4 1/8 1 2.469 2.875 3 15/16 3 8 7/8 5 7/8 12
3 8 1/4 5 1 1/8 3.068 3.500 4 5/8 3 1/8 8 7/8 6 5/8 15
3 1/2 9 5 1/2 1 3/16 3.548 4.00 5 1/4 3 3/16 8 7/8 7 1/4 18
4 10 6 3/16 1 1/4 4.026 4.500 5 3/4 3 3/8 8 7/8 7 7/8 25
5 11 7 5/16 1 3/8 5.047 5.563 7 3 7/8 8 7/8 9 1/4 32
6 12 1/2 8 1/2 1 7/16 6.065 6.625 8 1/8 3 7/8 12 7/8 10 5/8 42
8 15 10 5/8 1 5/8 7.981 8.625 10 1/4 4 3/8 12 1 13 67
10 17 1/2 12 3/4 1 7/8 10.020 10.750 12 5/8 4 5/8 16 1 1/8 15 1/4 91
12 20 1/2 15 2 12.00 12.750 14 3/4 5 1/8 16 1 1/4 17 3/4 138
14 23 16 1/4 2 1/8 13.25 14.00 16 3/4 5 5/8 20 1 1/4 20 1/4 186
16 25 1/2 18 1/2 2 1/4 15.25 16.00 19 5 3/4 20 1 3/8 22 1/2 246
18 28 21 2 3/8 17.25 18.00 21 6 1/4 24 1 3/8 24 3/4 305
20 30 1/2 23 2 1/2 19.25 20.00 23 1/8 6 3/8 24 1 3/8 27 378
22 33 25 1/4 2 5/8 21.25 22.00 25 1/4 6 1/2 24 1 5/8 29 1/4 425
24 36 27 1/4 2 3/4 23.25 24.00 27 5/8 6 5/8 24 1 5/8 32 545

Dimensions Weld Neck Flanges, ANSI CLASS 300, ASME B16.5, 1/16″ RING TYPE JOINT (IN)

  • Dimensions to ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
  • Bolt circle diameters are 1/8 inch larger than bolt diameter.

data wnf rjf b16.5 150 400Data rtj b16.5 150 2500data wnf rjf b16.5

Pipe Size

(NPS)

Outside Diameter of Flange

A

Thickness of Flange

C

Diameter of Bore

D

Diameter of Hub at Weld

H

Diameter of Hub at Base

J

Length of Hub

K

Diameter of Raised Face

T

Diameter of Groove

U

Groove Width

W

Groove Depth

X

Number of Bolt Holes

 

Diameter of Bolt Holes

 

Bolt Circle Diameter

P

1/2 3 3/4 1/2 0.622 0.840 1 1/2 2 1/16 2 1 11/32 9/32 7/32 4 5/8 2 5/8
3/4 4 5/8 9/16 0.824 1.050 1 7/8 2 1/4 2 1/2 1 11/16 11/32 1/4 4 3/4 3 1/4
1 4 7/8 5/8 1.049 1.315 2 1/8 2 7/16 2 3/4 2 11/32 1/4 4 3/4 3 1/2
1 1/4 5 1/4 11/16 1.380 1.660 2 1/2 2 9/16 3 1/8 2 3/8 11/32 1/4 4 3/4 3 7/8
1 1/2 6 1/8 3/4 1.610 1.900 2 3/4 2 11/16 3 9/16 2 11/16 11/32 1/4 4 7/8 4 1/2
2 6 1/2 13/16 2.067 2.375 3 5/16 2 3/4 4 1/4 3 1/4 15/32 5/16 8 3/4 5
2 1/2 7 1/2 15/16 2.469 2.875 3 15/16 3 5 4 15/32 5/16 8 7/8 5 7/8
3 8 1/4 1 1/16 3.068 3.500 4 5/8 3 1/8 5 3/4 4 7/8 15/32 5/16 8 7/8 6 5/8
3 1/2 9 1 1/8 3.548 4.00 5 1/4 3 3/16 6 1/4 5 3/16 15/32 5/16 8 7/8 7 1/4
4 10 1 3/16 4.026 4.500 5 3/4 3 3/8 6 7/8 5 7/8 15/32 5/16 8 7/8 7 7/8
5 11 1 5/16 5.047 5.563 7 3 7/8 8 1/4 7 1/8 15/32 5/16 8 7/8 9 1/4
6 12 1/2 1 3/8 6.065 6.625 8 1/8 3 7/8 9 1/2 8 5/16 15/32 5/16 12 7/8 10 5/8
8 15 1 9/16 7.981 8.625 10 1/4 4 3/8 11 7/8 10 5/8 15/32 5/16 12 1 13
10 17 1/2 1 13/16 10.020 10.750 12 5/8 4 5/8 14 12 3/4 15/32 5/16 16 1 1/8 15 1/4
12 20 1/2 1 15/16 12.00 12.750 14 3/4 5 1/8 16 1/4 15 15/32 5/16 16 1 1/4 17 3/4
14 23 2 1/16 13.25 14.00 16 3/4 5 5/8 18 16 1/2 15/32 5/16 20 1 1/4 20 1/4
16 25 1/2 2 3/16 15.25 16.00 19 5 3/4 20 18 1/2 15/32 5/16 20 1 3/8 22 1/2
18 28 2 5/16 17.25 18.00 21 6 1/4 22 5/8 21 15/32 5/16 24 1 3/8 24 3/4
20 30 1/2 2 7/16 19.25 20.00 23 1/8 6 3/8 25 23 17/32 3/8 24 1 3/8 27
22 33 2 9/16 21.25 22.00 25 1/4 6 1/2 27 25 19/32 7/16 24 1 5/8 29 1/4
24 36 2 11/16 23.25 24.00 27 5/8 6 5/8 29 1/2 27 1/4 21/32 7/16 24 1 5/8 32

Dimensions Weld Neck Flanges, ANSI CLASS 400, ASME B16.5, 1/16″ RING TYPE JOINT (IN)

  • Dimensions to ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
  • Bolt circle diameters are 1/8 inch larger than bolt diameter.

data wnf rjf b16.5 150 400Data rtj b16.5 150 2500data wnf rjf b16.5

Pipe Size

(NPS)

Outside

Diameterof

Flange

A

Thickness

of

Flange


C

Diameter

of

Bore


D

Diameter

of Hub

at Weld


H

Diameter

of Hub

at Base


J

Length

of

Hub


K

Diameter

of Raised

Face


T

Diameter

of

Grove


U

Grove

Width

 


W

Grove

Depth

 


X

Number

of

Bolt

Holes

Diameter

of

Bolt

Holes

Bolt

CircleDiameter


P

1/2 3 3/4 9/16 * 0.840 1 1/2 2 1/16 2 1 11/32 9/32 7/32 4 5/8 2 5/8
3/4 4 5/8 5/8 * 1.050 1 7/8 2 1/4 2 1/2 1 11/16 11/32 1/4 4 3/4 3 1/4
1 4 7/8 11/16 * 1.315 2 1/8 2 7/16 2 3/4 2 11/32 1/4 4 3/4 3 1/2
1 1/4 5 1/4 13/16 * 1.660 2 1/2 2 5/8 3 1/8 2 3/8 11/32 1/4 4 3/4 3 7/8
1 1/2 6 1/8 7/8 * 1.900 2 3/4 2 3/4 3 9/16 2 11/16 11/32 1/4 4 7/8 4 1/2
2 6 1/2 1 * 2.375 3 5/16 2 7/8 4 1/4 3 1/4 15/32 5/16 8 3/4 5
2 1/2 7 1/2 1 1/8 * 2.875 3 15/16 3 1/8 5 4 15/32 5/16 8 7/8 5 7/8
3 8 1/4 1 1/4 * 3.500 4 5/8 3 1/4 5 3/4 4 7/8 15/32 5/16 8 7/8 6 5/8
3 1/2 9 1 3/8 * 4.00 5 1/4 3 3/8 6 1/4 5 3/16 15/32 5/16 8 1 7 1/4
4 10 1 3/8 * 4.500 5 3/4 3 1/2 6 7/8 5 7/8 15/32 5/16 8 1 7 7/8
5 11 1 1/2 * 5.563 7 4 8 1/4 7 1/8 15/32 5/16 8 1 9 1/4
6 12 1/2 1 5/8 * 6.625 8 1/8 4 1/16 9 1/2 8 5/16 15/32 5/16 12 1 10 5/8
8 15 1 7/8 * 8.625 10 1/4 4 5/8 11 7/8 10 5/8 15/32 5/16 12 1 1/8 13
10 17 1/2 2 1/8 * 10.750 12 5/8 4 7/8 14 12 3/4 15/32 5/16 16 1 1/4 15 1/4
12 20 1/2 2 1/4 * 12.750 14 3/4 5 3/8 16 1/4 15 15/32 5/16 16 1 3/8 17 3/4
14 23 2 3/8 * 14.00 16 3/4 5 7/8 18 16 1/2 15/32 5/16 20 1 3/8 20 1/4
16 25 1/2 2 1/2 * 16.00 19 6 20 18 1/2 15/32 5/16 20 1 1/2 22 1/2
18 28 2 5/8 * 18.00 21 6 1/2 22 5/8 21 15/32 5/16 24 1 1/2 24 3/4
20 30 1/2 2 3/4 * 20.00 23 1/8 6 5/8 25 23 17/32 3/8 24 1 5/8 27
22 33 2 7/8 * 22.00 25 1/4 6 3/4 27 25 19/32 7/16 24 1 3/4 29 1/4
24 36 3 * 24.00 27 5/8 6 7/8 29 1/2 27 1/4 21/32 7/16 24 1 7/8 32

Dimensions Weld Neck Flanges, ANSI CLASS 600, ASME B16.47 SERIES A, 1/16″ RAISED FACE (IN)

  • Dimensions to ASME B16.47 – Large Diameter Steel Flanges: NPS 26 Through NPS 60 Metric/Inch Standard
  • Bolt circle diameters are 1/8 inch larger than bolt diameter.

data wnf b16.5 400 2500data wnf b16.47

Pipe Size

(NPS)

Outside Diameter of Flange

A

Diameter of Raised Face

B

Thickness of Flange

C

Diameter of Bore

D

Diameter of Hub at Weld

H

Diameter of Hub at Base

J

Length of Hub

K

Number of Bolt Holes

 

Diameter of Bolt Holes

 

Bolt Circle Diameter

P

Approx. Weight

(lb)

26 40 29 1/2 4 1/4 * 26 29 7/16 8 3/4 28 2 36 940
28 42 1/4 31 1/2 4 3/8 * 28 31 5/8 9 1/4 28 2 1/8 38 1060
30 44 1/2 33 3/4 4 1/2 * 30 33 15/16 9 3/4 28 2 1/8 40 1/4 1210
32 47 36 4 5/8 * 32 36 1/8 10 1/4 28 2 3/8 42 1/2 1375
34 49 38 4 3/4 * 34 38 5/16 10 5/8 28 2 3/8 44 1/2 1540
36 51 3/4 40 1/4 4 7/8 * 36 40 5/8 11 1/8 28 2 5/8 47 1705
38 50 41 1/2 6 * 38 40 1/4 10 28 2 3/8 45 3/4 1470
40 52 43 3/4 6 1/4 * 40 42 1/4 10 3/8 32 2 3/8 47 3/4 1630
42 55 1/4 46 6 5/8 * 42 44 3/8 11 28 2 5/8 50 1/2 2030
44 57 1/4 48 1/4 6 13/16 * 44 46 1/2 11 3/8 32 2 5/8 52 1/2 2160
46 59 1/2 50 1/4 7 1/16 * 46 48 5/8 11 13/16 32 2 5/8 54 3/4 2410
48 62 3/4 52 1/2 7 7/16 * 48 50 3/4 12 7/16 32 2 7/8 57 1/2 2855
50 65 3/4 54 1/2 7 3/4 * 50 52 7/8 12 15/16 28 3 1/8 60 3330
52 67 3/4 56 1/2 8 * 52 54 7/8 13 1/4 32 3 1/8 62 3560
54 70 58 3/4 8 1/4 * 54 57 13 3/4 32 3 1/8 64 1/4 3920
56 73 60 3/4 8 9/16 * 56 59 1/8 14 1/4 32 3 3/8 66 3/4 4280
58 75 63 8 3/4 * 58 61 1/8 14 9/16 32 3 3/8 68 3/4 4640
60 78 1/2 65 3/4 9 3/16 * 60 63 3/8 15 5/16 28 3 5/8 71 3/4 5000

Dimensions Weld Neck Flanges, ANSI CLASS 600, ASME B16.5, 1/4″ RAISED FACE (IN)

his datasheet is for weld neck flanges that have a raised face connection.  Additional in depth information about these flanges can be found on the raised face page.

  • Dimensions to ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
  • Bolt circle diameters are 1/8 inch larger than bolt diameter.

data wnf b16.5 400 2500data wnf b16.5

Pipe Size

(NPS)

Outside Diameter of Flange

A

Diameter of Raised Face

B

Thickness of Flange

C

Diameter of Bore

D

Diameter of Hub at Weld

H

Diameter of Hub at Base

J

Length of Hub

K

Number of Bolt Holes

 

Diameter of Bolt Holes

 

Bolt Circle Diameter

P

Approx. Weight

(lb)

1/2 3 3/4 1 3/8 9/16 * 0.840 1 1/2 2 1/16 4 5/8 2 5/8 3
3/4 4 5/8 1 11/16 5/8 * 1.050 1 7/8 2 1/4 4 3/4 3 1/4 4
1 4 7/8 2 11/16 * 1.315 2 1/8 2 7/16 4 3/4 3 1/2 5
1 1/4 5 1/4 2 1/2 13/16 * 1.660 2 1/2 2 5/8 4 3/4 3 7/8 7
1 1/2 6 1/8 2 7/8 7/8 * 1.900 2 3/4 2 3/4 4 7/8 4 1/2 10
2 6 1/2 3 5/8 1 * 2.375 3 5/16 2 7/8 8 3/4 5 12
2 1/2 7 1/2 4 1/8 1 1/8 * 2.875 3 15/16 3 1/8 8 7/8 5 7/8 18
3 8 1/4 5 1 1/4 * 3.500 4 5/8 3 1/4 8 7/8 6 5/8 23
3 1/2 9 5 1/2 1 3/8 * 4.00 5 1/4 3 3/8 8 1 7 1/4 26
4 10 3/4 6 3/16 1 1/2 * 4.500 6 4 8 1 8 1/2 42
5 13 7 5/16 1 3/4 * 5.563 7 7/16 4 1/2 8 1 1/8 10 1/2 68
6 14 8 1/2 1 7/8 * 6.625 8 3/4 4 5/8 12 1 1/8 11 1/2 81
8 16 1/2 10 5/8 2 3/16 * 8.625 10 3/4 5 1/4 12 1 1/4 13 3/4 117
10 20 12 3/4 2 1/2 * 10.75 13 1/2 6 16 1 3/8 17 189
12 22 15 2 5/8 * 12.75 15 3/4 6 1/8 20 1 3/8 19 1/4 226
14 23 3/4 16 1/4 2 3/4 * 14.00 17 6 1/2 20 1 1/2 20 3/4 347
16 27 18 1/2 3 * 16.00 19 1/2 7 20 1 5/8 23 3/4 481
18 29 1/4 21 3 1/4 * 18.00 21 1/2 7 1/4 20 1 3/4 25 3/4 555
20 32 23 3 1/2 * 20.00 24 7 1/2 24 1 3/4 28 1/2 690
22 34 1/4 25 1/4 3 3/4 * 22.00 26 1/2 7 3/4 24 1 7/8 30 5/8 620
24 37 27 1/4 4 * 24.00 28 1/4 8 24 2 33 977

Dimensions Weld Neck Flanges, ANSI CLASS 600, ASME B16.5, 1/16″ RING TYPE JOINT (IN)

  • Dimensions to ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
  • Bolt circle diameters are 1/8 inch larger than bolt diameter.

data wnf rjf b16.5 600 2500Data rtj b16.5 150 2500data wnf rjf b16.5

Pipe Size

(NPS)

Outside Diameter of Flange

A

Thickness of Flange

C

Diameter of Bore

D

Diameter of Hub at Weld

H

Diameter of Hub at Base

J

Length of Hub

K

Diameter of Raised Face

T

Diameter of Groove

U

Groove Width

W

Groove Depth

X

Number of Bolt Holes

 

Diameter of Bolt Holes

 

Bolt Circle Diameter

P

1/2 3 3/4 9/16 * 0.840 1 1/2 2 1/16 2 1 11/32 9/32 7/32 4 5/8 2 5/8
3/4 4 5/8 5/8 * 1.050 1 7/8 2 1/4 2 1/2 1 11/16 11/32 1/4 4 3/4 3 1/4
1 4 7/8 11/16 * 1.315 2 1/8 2 7/16 2 3/4 2 11/32 1/4 4 3/4 3 1/2
1 1/4 5 1/4 13/16 * 1.660 2 1/2 2 5/8 3 1/8 2 3/8 11/32 1/4 4 3/4 3 7/8
1 1/2 6 1/8 7/8 * 1.900 2 3/4 2 3/4 3 9/16 2 11/16 11/32 1/4 4 7/8 4 1/2
2 6 1/2 1 * 2.375 3 5/16 2 7/8 4 1/4 3 1/4 15/32 5/16 8 3/4 5
2 1/2 7 1/2 1 1/8 * 2.875 3 15/16 3 1/8 5 4 15/32 5/16 8 7/8 5 7/8
3 8 1/4 1 1/4 * 3.500 4 5/8 3 1/4 5 3/4 4 7/8 15/32 5/16 8 7/8 6 5/8
3 1/2 9 1 3/8 * 4.00 5 1/4 3 3/8 6 1/4 5 3/16 15/32 5/16 8 1 7 1/4
4 10 3/4 1 1/2 * 4.500 6 4 6 7/8 5 7/8 15/32 5/16 8 1 8 1/2
5 13 1 3/4 * 5.563 7 7/16 4 1/2 8 1/4 7 1/8 15/32 5/16 8 1 1/8 10 1/2
6 14 1 7/8 * 6.625 8 3/4 4 5/8 9 1/2 8 5/16 15/32 5/16 12 1 1/8 11 1/2
8 16 1/2 2 3/16 * 8.625 10 3/4 5 1/4 11 7/8 10 5/8 15/32 5/16 12 1 1/4 13 3/4
10 20 2 1/2 * 10.750 13 1/2 6 14 12 3/4 15/32 5/16 16 1 3/8 17
12 22 2 5/8 * 12.750 15 3/4 6 1/8 16 1/4 15 15/32 5/16 20 1 3/8 19 1/4
14 23 3/4 2 3/4 * 14.00 17 6 1/2 18 16 1/2 15/32 5/16 20 1 1/2 20 3/4
16 27 3 * 16.00 19 1/2 7 20 18 1/2 15/32 5/16 20 1 5/8 23 3/4
18 29 1/4 3 1/4 * 18.00 21 1/2 7 1/4 22 5/8 21 15/32 5/16 20 1 3/4 25 3/4
20 32 3 1/2 * 20.00 24 7 1/2 25 23 17/32 3/8 24 1 3/4 28 1/2
22 34 1/4 3 3/4 * 22.00 26 1/2 7 3/4 27 25 19/32 7/16 24 1 7/8 30 5/8
24 37 4 * 24.00 28 1/4 8 29 1/2 27 1/4 21/32 7/16 24 2 33

Dimensions Weld Neck Flanges, ANSI CLASS 900, ASME B16.5, 1/4″ RAISED FACE (IN)

his datasheet is for weld neck flanges that have a raised face connection.  Additional in depth information about these flanges can be found on the raised face page.

  • Dimensions to ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
  • Bolt circle diameters are 1/8 inch larger than bolt diameter.

data wnf b16.5 400 2500data wnf b16.5

Pipe Size

(NPS)

Outside Diameter of Flange

A

Diameter of Raised Face

B

Thickness of Flange

C

Diameter of Bore

D

Diameter of Hub at Weld

H

Diameter of Hub at Base

J

Length of Hub

K

Number of Bolt Holes

 

Diameter of Bolt Holes

 

Bolt Circle Diameter

P

Approx. Weight

(lb)

1/2 4 3/4 1 3/8 7/8 * 0.840 1 1/2 2 3/8 4 7/8 3 1/4 7
3/4 5 1/8 1 11/16 1 * 1.050 1 3/4 2 3/4 4 7/8 3 1/2 7
1 5 7/8 2 1 1/8 * 1.315 2 1/16 2 7/8 4 1 4 9
1 1/4 6 1/4 2 1/2 1 1/8 * 1.660 2 1/2 2 7/8 4 1 4 3/8 10
1 1/2 7 2 7/8 1 1/4 * 1.900 2 3/4 3 1/4 4 1 1/8 4 7/8 14
2 8 1/2 3 5/8 1 1/2 * 2.375 4 1/8 4 8 1 6 1/2 25
2 1/2 9 5/8 4 1/8 1 5/8 * 2.875 4 7/8 4 1/8 8 1 1/8 7 1/2 36
3 9 1/2 5 1 1/2 * 3.500 5 4 8 1 7 1/2 32
3 1/2
4 11 1/2 6 3/16 1 3/4 * 4.500 6 1/4 4 1/2 8 1 1/4 9 1/4 51
5 13 3/4 7 5/16 2 * 5.563 7 1/2 5 8 1 3/8 11 86
6 15 8 1/2 2 3/16 * 6.625 9 1/4 5 1/2 12 1 1/4 12 1/2 110
8 18 1/2 10 5/8 2 1/2 * 8.625 11 3/4 6 3/8 12 1 1/2 15 1/2 187
10 21 1/2 12 3/4 2 3/4 * 10.750 14 1/2 7 1/4 16 1 1/2 18 1/2 268
12 24 15 3 1/8 * 12.750 16 1/2 7 7/8 20 1 1/2 21 372
14 25 1/4 16 1/4 3 3/8 * 14.00 17 3/4 8 3/8 20 1 5/8 22 562
16 27 3/4 18 1/2 3 1/2 * 16.00 20 8 1/2 20 1 3/4 24 1/4 685
18 31 21 4 * 18.00 22 1/4 9 20 2 27 924
20 33 3/4 23 4 1/4 * 20.00 24 1/2 9 3/4 20 2 1/8 29 1/2 1164
22
24 41 27 1/4 5 1/2 * 24.00 29 1/2 11 1/2 20 2 5/8 35 1/2 2107

Dimensions Weld Neck Flanges, ANSI CLASS 900, ASME B16.5, 1/16″ RING TYPE JOINT (IN)

  • Dimensions to ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
  • Bolt circle diameters are 1/8 inch larger than bolt diameter.

data wnf rjf b16.5 600 2500Data rtj b16.5 150 2500data wnf rjf b16.5

Pipe Size

(NPS)

Outside Diameter of Flange

A

Thickness of Flange

C

Diameter of Bore

D

Diameter of Hub at Weld

H

Diameter of Hub at Base

J

Length of Hub

K

Diameter of Raised Face

T

Diameter of Groove

U

Groove Width

W

Groove Depth

X

Number of Bolt Holes

 

Diameter of Bolt Holes

 

Bolt Circle Diameter

P

1/2 4 3/4 7/8 * 0.840 1 1/2 2 3/8 2 3/8 1 9/16 11/32 1/4 4 7/8 3 1/4
3/4 5 1/8 1 * 1.050 1 3/4 2 3/4 2 5/8 1 3/4 11/32 1/4 4 7/8 3 1/2
1 5 7/8 1 1/8 * 1.315 2 1/16 2 7/8 2 13/16 2 11/32 1/4 4 1 4
1 1/4 6 1/4 1 1/8 * 1.660 2 1/2 2 7/8 3 3/16 2 3/8 11/32 1/4 4 1 4 3/8
1 1/2 7 1 1/4 * 1.900 2 3/4 3 1/4 3 5/8 2 11/16 11/32 1/4 4 1 1/8 4 7/8
2 8 1/2 1 1/2 * 2.375 4 1/8 4 4 7/8 3 3/4 15/32 5/16 8 1 6 1/2
2 1/2 9 5/8 1 5/8 * 2.875 4 7/8 4 1/8 5 3/8 4 1/4 15/32 5/16 8 1 1/8 7 1/2
3 9 1/2 1 1/2 * 3.500 5 4 6 1/8 4 7/8 15/32 5/16 8 1 7 1/2
3 1/2
4 11 1/2 1 3/4 * 4.500 6 1/4 4 1/2 7 1/8 5 7/8 15/32 5/16 8 1 1/4 9 1/4
5 13 3/4 2 * 5.563 7 1/2 5 8 1/2 7 1/8 15/32 5/16 8 1 3/8 11
6 15 2 3/16 * 6.625 9 1/4 5 1/2 9 1/2 8 5/16 15/32 5/16 12 1 1/4 12 1/2
8 18 1/2 2 1/2 * 8.625 11 3/4 6 3/8 12 1/8 10 5/8 15/32 5/16 12 1 1/2 15 1/2
10 21 1/2 2 3/4 * 10.750 14 1/2 7 1/4 14 1/4 12 3/4 15/32 5/16 16 1 1/2 18 1/2
12 24 3 1/8 * 12.750 16 1/2 7 7/8 16 1/2 15 15/32 5/16 20 1 1/2 21
14 25 1/4 3 3/8 * 14.00 17 3/4 8 3/8 18 3/8 16 1/2 21/32 7/16 20 1 5/8 22
16 27 3/4 3 1/2 * 16.00 20 8 1/2 20 5/8 18 1/2 21/32 7/16 20 1 3/4 24 1/4
18 31 4 * 18.00 22 1/4 9 23 3/8 21 25/32 1/2 20 2 27
20 33 3/4 4 1/4 * 20.00 24 1/2 9 3/4 25 1/2 23 25/32 1/2 20 2 1/8 29 1/2
22
24 41 5 1/2 * 24.00 29 1/2 11 1/2 30 3/8 27 1/4 1 1/16 5/8 20 2 5/8 35 1/2

Dimensions Weld Neck Flanges, ANSI CLASS 1500, ASME B16.5, 1/4″ RAISED FACE (IN)

his datasheet is for weld neck flanges that have a raised face connection.  Additional in depth information about these flanges can be found on the raised face page.

  • Dimensions to ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
  • Bolt circle diameters are 1/8 inch larger than bolt diameter.

data wnf b16.5 400 2500data wnf b16.5

Pipe Size

(NPS)

Outside Diameter of Flange

A

Diameter of Raised Face

B

Thickness of Flange

C

Diameter of Bore

D

Diameter of Hub at Weld

H

Diameter of Hub at Base

J

Length of Hub

K

Number of Bolt Holes

 

Diameter of Bolt Holes

 

Bolt Circle Diameter

P

Approx. Weight

(lb)

1/2 4 3/4 1 3/8 7/8 * 0.840 1 1/2 2 3/8 4 7/8 3 1/4 9
3/4 5 1/8 1 11/16 1 * 1.050 1 3/4 2 3/4 4 7/8 3 1/2 9
1 5 7/8 2 1 1/8 * 1.315 2 1/16 2 7/8 4 1 4 9
1 1/4 6 1/4 2 1/2 1 1/8 * 1.660 2 1/2 2 7/8 4 1 4 3/8 10
1 1/2 7 2 7/8 1 1/4 * 1.900 2 3/4 3 1/4 4 1 1/8 4 7/8 14
2 8 1/2 3 5/8 1 1/2 * 2.375 4 1/8 4 8 1 6 1/2 25
2 1/2 9 5/8 4 1/8 1 5/8 * 2.875 4 7/8 4 1/8 8 1 1/8 7 1/2 36
3 10 1/2 5 1 7/8 * 3.500 5 1/4 4 5/8 8 1 1/4 8 48
3 1/2
4 12 1/4 6 3/16 2 1/8 * 4.500 6 3/8 4 7/8 8 1 3/8 9 1/2 73
5 14 3/4 7 5/16 2 7/8 * 5.563 7 3/4 6 1/8 8 1 5/8 11 1/2 132
6 15 1/2 8 1/2 3 1/4 * 6.625 9 6 3/4 12 1 1/2 12 1/2 164
8 19 10 5/8 3 5/8 * 8.625 11 1/2 8 3/8 12 1 3/4 15 1/2 273
10 23 12 3/4 4 1/4 * 10.750 14 1/2 10 12 2 19 454
12 26 1/2 15 4 7/8 * 12.750 17 3/4 11 1/8 16 2 1/8 22 1/2 690
14 29 1/2 16 1/4 5 1/4 * 14.00 19 1/2 11 3/4 16 2 3/8 25 940
16 32 1/2 18 1/2 5 3/4 * 16.00 21 3/4 12 1/4 16 2 5/8 27 3/4 1250
18 36 21 6 3/8 * 18.00 23 1/2 12 7/8 16 2 7/8 30 1/2 1625
20 38 3/4 23 7 * 20.00 25 1/4 14 16 3 1/8 32 3/4 2050
22
24 46 27 1/4 8 * 24.00 30 16 16 3 5/8 39 3325

Dimensions Weld Neck Flanges, ANSI CLASS 1500, ASME B16.5, 1/16″ RING TYPE JOINT (IN)

  • Dimensions to ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
  • Bolt circle diameters are 1/8 inch larger than bolt diameter.

data wnf rjf b16.5 600 2500Data rtj b16.5 150 2500data wnf rjf b16.5

Pipe Size

(NPS)

Outside Diameter of Flange

A

Thickness of Flange

C

Diameter of Bore

D

Diameter of Hub at Weld

H

Diameter of Hub at Base

J

Length of Hub

K

Diameter of Raised Face

T

Diameter of Groove

U

Groove Width

W

Groove Depth

X

Number of Bolt Holes

 

Diameter of Bolt Holes

 

Bolt Circle Diameter

P

1/2 4 3/4 7/8 * 0.840 1 1/2 2 3/8 2 3/8 1 9/16 11/32 1/4 4 7/8 3 1/4
3/4 5 1/8 1 * 1.050 1 3/4 2 3/4 2 5/8 1 3/4 11/32 1/4 4 7/8 3 1/2
1 5 7/8 1 1/8 * 1.315 2 1/16 2 7/8 2 13/16 2 11/32 1/4 4 1 4
1 1/4 6 1/4 1 1/8 * 1.660 2 1/2 2 7/8 3 3/16 2 3/8 11/32 1/4 4 1 4 3/8
1 1/2 7 1 1/4 * 1.900 2 3/4 3 1/4 3 5/8 2 11/16 11/32 1/4 4 1 1/8 4 7/8
2 8 1/2 1 1/2 * 2.375 4 1/8 4 4 7/8 3 3/4 15/32 5/16 8 1 6 1/2
2 1/2 9 5/8 1 5/8 * 2.875 4 7/8 4 1/8 5 3/8 4 1/4 15/32 5/16 8 1 1/8 7 1/2
3 10 1/2 1 7/8 * 3.500 5 1/4 4 5/8 6 5/8 5 3/8 15/32 5/16 8 1 1/4 8
3 1/2
4 12 1/4 2 1/8 * 4.500 6 3/8 4 7/8 7 5/8 6 3/8 15/32 5/16 8 1 3/8 9 1/2
5 14 3/4 2 7/8 * 5.563 7 3/4 6 1/8 9 7 5/8 15/32 5/16 8 1 5/8 11 1/2
6 15 1/2 3 1/4 * 6.625 9 6 3/4 9 3/4 8 5/16 17/32 3/8 12 1 1/2 12 1/2
8 19 3 5/8 * 8.625 11 1/2 8 3/8 12 1/2 10 5/8 21/32 7/16 12 1 3/4 15 1/2
10 23 4 1/4 * 10.750 14 1/2 10 14 5/8 12 3/4 21/32 7/16 12 2 19
12 26 1/2 4 7/8 * 12.750 17 3/4 11 1/8 17 1/4 15 29/32 9/16 16 2 1/8 22 1/2
14 29 1/2 5 1/4 * 14.00 19 1/2 11 3/4 19 1/4 16 1/2 1 1/16 5/8 16 2 3/8 25
16 32 1/2 5 3/4 * 16.00 21 3/4 12 1/4 21 1/2 18 1/2 1 3/16 11/16 16 2 5/8 27 3/4
18 36 6 3/8 * 18.00 23 1/2 12 7/8 24 1/8 21 1 3/16 11/16 16 2 7/8 30 1/2
20 38 3/4 7 * 20.00 25 1/4 14 26 1/2 23 1 5/16 11/16 16 3 1/8 32 3/4
22
24 46 8 * 24.00 30 16 31 1/4 27 1/4 1 7/16 13/16 16 3 5/8 39

Dimensions Weld Neck Flanges, ANSI CLASS 2500, ASME B16.5, 1/4″ RAISED FACE (IN)

his datasheet is for weld neck flanges that have a raised face connection.  Additional in depth information about these flanges can be found on the raised face page.

  • Dimensions to ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
  • Bolt circle diameters are 1/8 inch larger than bolt diameter.

data wnf b16.5 400 2500data wnf b16.5

Pipe Size

(NPS)

Outside Diameter of Flange

A

Diameter of Raised Face

B

Thickness of Flange

C

Diameter of Bore

D

Diameter of Hub at Weld

H

Diameter of Hub at Base

J

Length of Hub

K

Number of Bolt Holes

 

Diameter of Bolt Holes

 

Bolt Circle Diameter

P

Approx. Weight

(lb)

1/2 5 1/4 1 3/8 1 3/16 * 0.840 1 11/16 2 7/8 4 7/8 3 1/2 8
3/4 5 1/2 1 11/16 1 1/4 * 1.050 2 3 1/8 4 7/8 3 3/4 9
1 6 1/4 2 1 3/8 * 1.315 2 1/4 3 1/2 4 1 4 1/4 13
1 1/4 7 1/4 2 1/2 1 1/2 * 1.660 2 7/8 3 3/4 4 1 1/8 5 1/8 20
1 1/2 8 2 7/8 1 3/4 * 1.900 3 1/8 4 3/8 4 1 1/4 5 3/4 28
2 9 1/4 3 5/8 2 * 2.375 3 3/4 5 8 1 1/8 6 3/4 42
2 1/2 10 1/2 4 1/8 2 1/4 * 2.900 4 1/2 5 5/8 8 1 1/4 7 3/4 52
3 12 5 2 5/8 * 3.500 5 1/4 6 5/8 8 1 3/8 9 94
3 1/2
4 14 6 3/16 3 * 4.500 6 1/2 7 1/2 8 1 5/8 10 3/4 146
5 16 1/2 7 5/16 3 5/8 * 5.563 8 9 8 1 7/8 12 3/4 244
6 19 8 1/2 4 1/4 * 6.625 9 1/4 10 3/4 8 2 1/8 14 1/2 378
8 21 3/4 10 5/8 5 * 8.625 12 12 1/2 12 2 1/8 17 1/4 576
10 26 1/2 12 3/4 6 1/2 * 10.750 14 3/4 16 1/2 12 2 5/8 21 1/4 1068
12 30 15 7 1/4 * 12.750 17 3/8 18 1/4 12 2 7/8 24 3/8 1608

Dimensions Weld Neck Flanges, ANSI CLASS 2500, ASME B16.5, 1/16″ RING TYPE JOINT (IN)

  • Dimensions to ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
  • Bolt circle diameters are 1/8 inch larger than bolt diameter.

data wnf rjf b16.5 600 2500Data rtj b16.5 150 2500data wnf rjf b16.5

Pipe Size

(NPS)

Outside Diameter of Flange

A

Thickness of Flange

C

Diameter of Bore

D

Diameter of Hub at Weld

H

Diameter of Hub at Base

J

Length of Hub

K

Diameter of Raised Face

T

Diameter of Groove

U

Groove Width

W

Groove Depth

X

Number of Bolt Holes

 

Diameter of Bolt Holes

 

Bolt Circle Diameter

P

1/2 5 1/4 1 3/16 * 0.840 1 11/16 2 7/8 2 9/16 1 11/16 11/32 1/4 4 7/8 3 1/2
3/4 5 1/2 1 1/4 * 1.050 2 3 1/8 2 7/8 2 11/32 1/4 4 7/8 3 3/4
1 6 1/4 1 3/8 * 1.315 2 1/4 3 1/2 3 1/4 2 3/8 11/32 1/4 4 1 4 1/4
1 1/4 7 1/4 1 1/2 * 1.660 2 7/8 3 3/4 4 2 27/32 15/32 5/16 4 1 1/8 5 1/8
1 1/2 8 1 3/4 * 1.900 3 1/8 4 3/8 4 1/2 3 1/4 15/32 5/16 4 1 1/4 5 3/4
2 9 1/4 2 * 2.375 3 3/4 5 5 1/4 4 15/32 5/16 8 1 1/8 6 3/4
2 1/2 10 1/2 2 1/4 * 2.875 4 1/2 5 5/8 5 7/8 4 3/8 17/32 3/8 8 1 1/4 7 3/4
3 12 2 5/8 * 3.500 5 1/4 6 5/8 6 5/8 5 17/32 3/8 8 1 3/8 9
3 1/2
4 14 3 * 4.500 6 1/2 7 1/2 8 6 3/16 22/51 7/16 8 1 5/8 10 3/4
5 16 1/2 3 5/8 * 5.563 8 9 9 1/2 7 1/2 21/32 1/2 8 1 7/8 12 3/4
6 19 4 1/4 * 6.625 9 1/4 10 3/4 11 9 25/32 1/2 8 2 1/8 14 1/2
8 21 3/4 5 * 8.625 12 12 1/2 13 3/8 11 29/32 9/16 12 2 1/8 17 1/4
10 26 1/2 6 1/2 * 10.75 14 3/4 16 1/2 16 3/4 13 1/2 1 3/16 11/16 12 2 5/8 21 1/4
12 30 7 1/4 * 12.75 17 3/8 18 1/4 19 1/2 16 1 5/16 11/16 12 2 7/8 24 3/8

 

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