ASME B16.47 Flanges

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ANSI B16.47 Series A Class 150 flanges Dimensions Chart

  Thickness   Drilling   Weight
Minimal Size OD Blind Weld Neck Diameter at Base OD of RF Bore LTH Bolt Length Dia Bevel HoleDia Bolt Circle #  of Holes Blind Weld Neck
O C C X R B Y (1) A (2)
26 34.25 2.63 2.63 26.62 29.5 As per Client 4.69 8.75 26 1.38 31.75 24 702 300
28 36.5 2.75 2.75 28.62 31.5 4.88 9 28 1.38 34 28 833 345
30 38.75 2.88 2.88 30.75 33.75 5.32 9.25 30 1.38 36 28 982 400
32 41.75 3.13 3.13 32.75 36 5.63 10.5 32 1.62 38.5 28 1237 505
34 43.75 3.19 3.19 34.75 38 5.82 10.5 34 1.62 40.5 32 1384 540
36 46 3.5 3.5 36.75 40.25 6.13 11 36 1.62 42.75 32 1676 640
38 48.75 3.38 3.38 39 42.25 6.13 11 38 1.62 45.25 32 1819 720
40 50.75 3.5 3.5 41 44.25 6.38 11 40 1.62 47.25 36 2040 775
42 53 3.75 3.75 43 47 6.69 11.5 42 1.62 49.5 36 2381 890
44 55.25 3.94 3.94 45 49 6.94 12 44 1.62 51.75 40 2717 990
46 57.25 4 4 47.12 51 7.25 12 46 1.62 53.75 40 2961 1060
48 59.5 4.19 4.19 49.12 53.5 7.5 12.5 48 1.62 56 44 3348 1185
50 61.75 4.32 4.32 51.25 55.5 7.94 13.25 50 1.88 58.25 44 3716 1270
52 64 4.5 4.5 53.25 57.5 8.19 13.75 52 1.88 60.5 44 4156 1410
54 66.25 4.69 4.69 55.25 59.5 8.44 14 54 1.88 62.75 44 4639 1585
56 68.75 4.82 4.82 57.38 62 8.94 14.25 56 1.88 65 48 5132 1760
58 71 5 5 59.38 64 9.19 14.75 58 1.88 67.25 48 5675 1915
60 73 5.13 5.13 61.38 66 9.38 15 60 1.88 69.25 52 6154 2045

Dimension of ASME B16.47 Class 300 Series A Blind Flange

  Thick. Drilling Weights
NPS O.D. O.D. of  RF Weld Neck Diameter at Base Blind Bore Dia Bevel LTH Hole Dia  Bolt Circle Bolt Length # of Holes Weld Neck Blind
O R C X C B A Y (2) (1)
26 38.25 29.5 3.07 28.38 3.25 As per Client 26 7.19 1.75 34.5 10.75 28 605 1078
28 40.75 31.5 3.32 30.5 3.5 28 7.69 1.75 37 11.25 28 745 1315
30 43 33.75 3.57 32.56 3.69 30 8.19 1.88 39.25 12 28 870 1543
32 45.25 36 3.82 34.69 3.88 32 8.69 2 41.5 12.5 28 1005 1795
34 47.5 38 3.94 36.88 4.07 34 9.07 2 43.5 13 28 1145 2068
36 50 40.25 4.07 39 4.32 36 9.44 2.12 46 13.5 32 1275 2436
38 46 40.5 4.19 39.12 4.19 38 7.06 1.62 43 12.5 32 695 2001
40 48.75 42.75 4.44 41.25 4.44 40 7.56 1.75 45.5 13.25 32 840 2380
42 50.75 44.75 4.63 43.25 4.63 42 7.82 1.75 47.5 13.75 32 950 2688
44 53.25 47 4.82 45.25 4.82 44 8.06 1.88 49.75 14.25 32 1055 3079
46 55.75 49 5 47.38 5 46 8.44 2 52 15 28 1235 3499
48 57.75 51.25 5.19 49.38 5.19 48 8.75 2 54 15.25 32 1380 3896
50 60.25 53.5 5.44 51.38 5.44 50 9.07 2.12 56.25 16 32 1530 4442
52 62.25 55.5 5.63 53.38 5.63 52 9.32 2.12 58.25 16.5 32 1660 4906
54 65.25 57.75 5.94 55.5 5.94 54 9.88 2.38 61 17.5 28 2050 5684
56 67.25 59.75 6 57.62 6 56 10.19 2.38 63 17.75 28 2155 6098
58 69.25 62 6.19 59.62 6.19 58 10.44 2.38 65 18 32 2270 6669
60 71.25 64 6.38 61.62 6.38 60 10.69 2.38 67 18.5 32 2470 7274

ASME B16.47 Class 400 Series A Welding Neck Flanges Dimensional Table

Thk Drilling Weight
Sizes Blind O.D. Weld Neck Diameter at Base OD of RF Bore LTH Length of Bolt Diameter Bevel Bolt Circle # of Holes HoleDia  WN Blind
C O C X R B  Y 1 A 2
26 3.88 38.25 3.5 28.62 29.5 As per Client 7.62 12.5 26 34.5 28 1.88 650 1263
28 4.12 40.75 3.75 30.81 31.5 8.12 13.25 28 37 28 2 785 1522
30 4.38 43 4 32.94 33.75 8.62 14 30 39.25 28 2.12 905 1802
32 4.56 45.25 4.25 35 36 9.12 14.25 32 41.5 28 2.12 1065 2077
34 4.81 47.5 4.38 37.19 38 9.5 14.75 34 43.5 28 2.12 1200 2415
36 5.06 50 4.5 39.38 40.25 9.88 15 36 46 32 2.12 1340 2815
38 4.88 47.5 4.88 39.5 40.75 8.12 14.75 38 44 32 1.88 935 2450
40 5.12 50 5.12 41.5 43 8.5 15.5 40 46.25 32 2 1090 2848
42 5.25 52 5.25 43.62 45 8.81 15.75 42 48.25 32 2 1190 3159
44 5.5 54.5 5.5 45.62 47.25 9.18 16.5 44 50.5 32 2.12 1375 3635
46 5.75 56.75 5.75 47.75 49.5 9.62 17 46 52.75 36 2.12 1525 4120
48 6 59.5 6 49.88 51.5 10.12 18 48 55.25 28 2.38 1790 4726
50 6.25 61.75 6.19 52 53.62 10.56 18.5 50 57.5 32 2.38 1950 5303
52 6.44 63.75 6.38 54 55.62 10.88 18.75 52 59.5 32 2.38 2125 5823
54 6.75 67 6.69 56.12 57.88 11.38 20 54 62.25 28 2.62 2565 6742
56 6.94 69 6.88 58.25 60.12 11.75 20.25 56 64.25 32 2.62 2710 7352
58 7.12 71 7 60.25 62.12 12.06 20.5 58 66.25 32 2.62 3230 7986
60 7.44 74.25 7.31 62.38 64.38 12.56 21.75 60 69 32 2.88 3820 9126

Dimensions Chart of B16 47 Series A 600 Blind Flanges

Thick.   Drilling Weights
Nom Size Blind OD Weld Neck Dia. at Base O.D. of RF Bore LTH Dia Bevel # of Holes Bolt Circle Bolt Length Blind HoleDia  Weld Neck
C O C X R B  Y A -1 -2
26 4.94 40 4.25 29.44 29.5 As per Client 8.75 26 28 36 14.5 1759 2 940
28 5.19 42.25 4.38 31.62 31.5 9.25 28 28 38 15 2061 2.12 1060
30 5.5 44.5 4.5 33.94 33.75 9.75 30 28 40.25 15.5 2423 2.12 1210
32 5.81 47 4.62 36.12 36 10.25 32 28 42.5 16.5 2856 2.38 1375
34 6.06 49 4.75 38.31 38 10.62 34 28 44.5 16.75 3237 2.38 1540
36 6.38 51.75 4.88 40.62 40.25 11.12 36 28 47 17.75 3802 2.62 1705
38 6.12 50 6 40.25 41.5 10 38 28 45.75 18.25 3404 2.38 1470
40 6.38 52 6.25 42.25 43.75 10.38 40 32 47.75 18.75 3838 2.38 1630
42 6.75 55.25 6.62 44.38 46 11 42 28 50.5 19.75 4585 2.62 2030
44 7 57.25 6.81 46.5 48.25 11.38 44 32 52.5 20.25 5105 2.62 2160
46 7.31 59.5 7.06 48.62 50.25 11.81 46 32 54.75 20.75 5758 2.62 2410
48 7.69 62.75 7.44 50.75 52.5 12.44 48 32 57.5 22.25 6737 2.88 2855
50 8 65.75 7.75 52.88 54.5 12.94 50 28 60 23.25 7695 3.12 3330
52 8.25 67.75 8 54.88 56.5 13.25 52 32 62 23.75 8426 3.12 3560
54 8.56 70 8.25 57 58.75 13.75 54 32 64.25 24.25 9333 3.12 3920
56 8.88 73 8.56 59.12 60.75 14.25 56 32 66.75 25.5 10529 3.38 4280
58 9.12 75 8.75 61.12 63 14.56 58 32 68.75 26 11414 3.38 4640
60 9.56 78.5 9.19 63.38 65.25 15.31 60 28 71.75 27.25 13108 3.62 5000

ANSI B16.47 Series A Class 900 Weld Neck Flanges Standard Dimensions

Thk.   Weights
Nom Size Blind O.D. Weld Neck O.D. of RF Diameter at Base Bore Bolt Circle LTH Dia Bevel Hole Dia  Bolt Length # of Holes Blind Weld Neck
C O C R X B  Y A -2 -1
26 6.31 42.75 5.5 29.5 30.5 As per Client 37.5 11.25 26 2.88 18.75 20 2566 1525
28 6.75 46 5.62 31.5 32.75 40.25 11.75 28 3.12 19.75 20 3178 1810
30 7.18 48.5 5.88 33.75 35 42.75 12.25 30 3.12 20.5 20 3758 2120
32 7.62 51.75 6.25 36 37.25 45.5 13 32 3.38 22 20 4541 2545
34 8.06 55 6.5 38 39.62 48.25 13.75 34 3.62 23 20 5425 2970
36 8.44 57.5 6.75 40.25 41.88 50.75 14.25 36 3.62 23.75 20 6209 3395
38 8.5 57.5 7.5 43.25 42.25 50.75 13.88 38 3.62 24.5 20 6253 3385
40 8.81 59.5 7.75 45.75 44.38 52.75 14.31 40 3.62 25 24 6940 3620
42 9.12 61.5 8.12 47.75 46.31 54.75 14.62 42 3.62 25.75 24 7675 3960
44 9.56 64.88 8.44 50 48.62 57.62 15.38 44 3.88 27 24 8954 4300
46 10.06 68.25 8.88 52.5 50.88 60.5 16.18 46 4.12 28.5 24 10426 4640
48 10.38 70.25 9.19 54.5 52.88 62.5 16.5 48 4.12 29 24 11398 4980

Weight Chart of ANSI B16 47 Series A (Mss Sp-44) Flanges

Minimal Pipe Size Dimensions Weight (Kg)
NPS
(inch.)		 DN (millimeter) O.D.
(Millimeter)		 Thickness
D
(mm)		 SOW
Socket Weld		 Blind WN
1/2 15 88.9 11.2 0.4 0.4 0.5
3/4 20 98.6 12.7 0.6 0.6 0.7
1 25 108 14.2 0.8 0.9 1
1 1/4 32 117.3 15.7 1 1.2 1.3
1 1/2 40 127 17.5 1.3 1.5 1.7
2 50 152.4 19.1 2.1 2.4 2.6
2 1/2 65 177.8 22.4 3.3 3.9 4.1
3 80 190.5 23.9 3.9 4.9 4.9
3 1/2 90 215.9 23.9 4.8 6.2 6.1
4 100 228.6 23.9 5.3 7.0 6.8
5 125 254 23.9 6.1 8.6 8.6
6 150 279.4 25.4 7.5 11.3 10.6
8 200 342.9 28.4 12.1 19.6 17.6
10 250 406.4 30.2 16.5 28.6 24
12 300 482.6 31.8 26.2 43.2 36.5
14 350 533.4 35.1 34.6 58.1 48.4
16 400 596.9 36.6 44.8 76.1 60.6
18 450 635 39.6 48.9 93.7 68.3
20 500 698.5 42.9 61.9 122.0 84.5
24 600 812.8 47.8 86.9 185.0 115

ANSI B16.47 Series A Flange Temperature Rating

Flanges Tables -10°
Celsius to 200°
Celsius		 250°
Celsius		 300°
Celsius		 350°
Celsius		 400°
Celsius		 425°
Celsius		 450°
Celsius		 475°
Celsius
6 6 5.5 5 – – – – –
10 10 9 8 7 6 – – –
16 16 15 13 11 9 – – –
25 25 24 21 17 14 12 9 6
40 40 38 33 28 23 20 15 10
64 64 61 53 44 36 32 24 16
100 100 95 83 70 57 50 37 25
160 160 152 132 112 92 80 60 40

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