ANSI B16.47 Series A Welding Neck Flange Dimensions

Weld neck flange dimensions are covered in ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard, ASME B16.36 – Orifice Flanges, ASME B16.47 – Large Diameter Steel Flanges: NPS 26 Through NPS 60 Metric/Inch Standard.

Weld Neck Flange Dimensions & Approximate Masses

20190130074341 96198 - ANSI B16.47 Series A Welding Neck Flange Dimensions

ansi b16 47 series a welding neck flange dimensions - ANSI B16.47 Series A Welding Neck Flange Dimensions
ANSI CLASS 150, B16.47 Series A (IN), Welding Neck Flange

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

ANSI CLASS 300, B16.47 Series A (IN), Welding Neck Flange

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

ANSI CLASS 400, B16.47 Series A (IN), Welding Neck Flange

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 1/2 * 26 28 5/8 7 5/8 28 1 7/8 34 1/2 650
28 40 3/4 31 1/2 3 3/4 * 28 30 13/16 8 1/8 28 2 37 785
30 43 33 3/4 4 * 30 32 15/16 8 5/8 28 2 1/8 39 1/4 905
32 45 1/4 36 4 1/4 * 32 35 9 1/8 28 2 1/8 41 1/2 1065
34 47 1/2 38 4 3/8 * 34 37 3/16 9 1/2 28 2 1/8 43 1/2 1200
36 50 40 1/4 4 1/4 * 36 39 3/8 9 7/8 32 2 1/8 46 1340
38 47 1/2 40 3/4 4 1/8 * 38 39 1/2 8 1/8 32 1 7/8 44 935
40 50 43 5 1/8 * 40 41 1/2 8 1/2 32 2 46 1/4 1090
42 52 45 5 1/4 * 42 43 5/8 8 13/16 32 2 48 1/4 1190
44 54 1/2 47 1/4 5 1/2 * 44 45 5/8 8 3/16 32 2 1/8 50 1/2 1375
46 56 3/4 49 1/2 5 3/4 * 46 47 3/4 9 5/8 36 2 1/8 52 3/4 1525
48 59 1/2 51 1/2 6 * 48 49 7/8 10 1/8 28 2 3/8 55 1/4 1790
50 61 3/4 53 5/8 6 3/16 * 50 52 10 9/16 32 2 3/8 57 1/2 1950
52 63 3/4 55 5/8 6 3/8 * 52 54 10 7/8 32 2 3/8 59 1/2 2125
54 67 57 7/8 6 11/16 * 54 56 1/8 11 3/8 28 2 5/8 62 1/4 2565
56 69 60 1/8 6 1/8 * 56 58 1/4 11 3/4 32 2 5/8 64 1/4 2710
58 71 62 1/8 7 * 58 60 1/4 12 1/16 32 2 5/8 66 1/4 3230
60 71 1/4 64 3/8 7 5/16 * 60 62 3/8 12 9/16 32 2 7/8 69 3820

ANSI CLASS 600, B16.47 Series A (IN), Welding Neck Flange

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

WELD NECK FLANGE – INDUSTRY STANDARD

20190130074341 96198 - ANSI B16.47 Series A Welding Neck Flange Dimensions

20190130074424 50769 - ANSI B16.47 Series A Welding Neck Flange Dimensions

ANSI Class 75, Industry Standard (in)

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

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