ASME B16.47 Series A
(MSS SP-44) Flanges
Class 300 lb
Pipe
Flange Data
Hub Data
Raised Face
Drilling Data
Radius
Nominal Pipe Size
A
C
D
E
F
J
G
H
I
R
Overall Diameter
WNF Flange Thickness mm
Blind Flange Thickness mm
Overall Length WNF
Diameter at Weld Bevel
Hub Diameter
Face Diameter
Number of Holes
Bolt Hole Diameter
Diameter of Circle of Holes
Fillet
inch
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
mm
22
33.00 838.20
2.62
66.55
2.62
66.55
6.50 165.10
22.00 558.80
25.25 641.35
25.25 641.35
24
1.62
41.15
29.25 742.95
0.38 9.65
26
38.25 971.55
3.12
79.25
3.31
84.07
7.25 184.15
26.00 660.40
28.38 720.85
29.50 749.30
28
1.75
44.45
34.50 876.30
0.38 9.65
28
40.75 1035.1
3.38
85.85
3.56
90.42
7.75 196.85
28.00
711.20
30.50 774.70
31.50 800.10
28
1.75
44.45
37.00 939.80
0.44 11.18
30
43.00 1092.2
3.62
91.95
3.75
95.25
8.25 209.55
30.00 762.00
32.56 827.02
33.75 857.25
28
1.88
47.75
39.25 996.95
0.44 11.18
32
45.25 1149.4
3.88
98.55
3.94
100.08
8.75 222.25
32.00
812.80
34.69 881.13
36.00 914.40
28
2.00
50.80
41.50 1054.1
0.44 11.18
34
47.50 120.50
4.00
101.60
4.12
104.65
9.12 231.65
34.00 863.60
36.88 936.75
38.00 965.20
28
2.00
50.80
43.50 1104.9
0.50 12.70
36
50.00 1270.0
4.12
104.65
4.38
111.25
9.50 241.30
36.00 914.40
39.00 990.60
40.25 1022.4
32
2.12
53.85
46.00 1168.4
0.50 12.70
38
46.00 1168.4
4.25
107.95
4.25
107.95
7.12 180.85
38.00 965.20
39.12 993.65
40.50 1028.7
32
1.62
41.15
43.00 1092.2
0.50 12.70
40
48.75 1238.3
4.50
114.30
4.50
114.30
7.62 193.55
40.00 1016.0
41.25 1047.8
42.75 1085.9
32
1.75
44.45
45.50 1155.7
0.50 12.70
42
50.75 1289.1
4.69
119.13
4.69
119.13
7.88 200.15
42.00 1066.8
43.25 1098.6
44.75 1136.7
32
1.75
44.45
47,50 1206.6
0.50 12.70
44
53.25 1352.6
4.88
123.95
4.88
123.95
8.12 206.25
44.00 1117.6
45.25 1149.4
47.00 1193.8
32
1.88
47.75
49.75 1263.7
0.50 12.70
46
55.75 1416.1
5.06
128.52
5.06
128.52
8.50 215.90
46.00 1168.4
47.38 1203.5
49.00 1244.0
28
2.00
50.80
52.00 1320.8
0.50 12.70
48
57 75 1466.9
5.25
133.35
5.25
133.35
8 81 223.77
48.00 1219.2
49.38 1254.3
51.25 1301.8
32
2.00
50.80
54.00 1371.6
0.50 12.70
Notes
- ASME B16.47 Series A flanges (> NPS 26) are MMS SP-44 flanges. MSS SP-44 also covers NPS 12 to NPS 24 flanges
which are equivalent to ASME B16.5. MSS SP-44 is the only source for the NPS 22 flange dimensions above.
-
Dimension B is to be specified by the purchaser. It corresponds to the pipe inside diameter.
-
Flat face flanges may be provided at full thickness, C, or with raised face removed (the latter is nonstandard)
-
WNF = Weld Neck
-
Flange.
The large end of the hub may be straight or tapered.
