ASME B16.47 Series A
(MSS SP-44) Flanges
Class 400 lb
Pipe
Flange Data
Hub Data
Raised
Face
Drilling Data
Radius
Norminal
Pipe
Size
A
C
D
E
F
G
H
I
J
R
Overall
Diameter
WNF
Flange
Thickness
min
Blind
Flange
Thickness
min
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
2.88
73.15
2.88
73.15
6.75 171.45
22.00 558.80
25.25 641.35
25.25 641.35
24
1.75
44.45
29.25 742.95
0.44 11.18
26
38.25 971.55
3.50
88.90
3.88
98.55
7.62 193.55
26.00 660.40
28.62 726.95
29.50 749.30
28
1.88
47.75
34.50 876.30
0.44 11.18
28
40.75 1035.1
3.75
95.25
4.12 104.65
8.12 206.25
28.00 711.20
30.81 782.57
31.50 800.10
28
2.00
50.80
37.00 939.80
0.50 12.70
30
43.00 1092.2
4.00 101.60
4.38 111.25
8.62 218.95
30.00 762.00
32.94 836.68
33.75 857.25
28
2.12
53.85
39.25 996.95
0.50 12.70
32
45.25 1149.4
4.25 107.95
4.56 115.82
9.12 231.65
32.00 812.80
35.00 889.00
36.00 914.40
28
2.12
53.85
41.50 1054.1
0.50 12.70
34
47.50 1206.5
4.38 111.25
4.81 122.17
9.50 241.30
34.00 863.60
37.19 944.63
38.00 965.20
28
2.12
53.85
43.50 1104.9
0.56 14.22
36
50.00 1270.0
4.50 114.30
5.06 128.52
9.88 250.95
36.00 914.40
39.38 1000.3
40.25 1022.4
32
2.12
53.85
46.00 1168.4
0.56 14.22
38
47.50 1206.5
4.88 123.95
4.88 123.95
81.2 206.25
48.00 1219.2
39.50 1003.3
40.75 1035.1
32
1.88
47.75
44.00 1117.6
0.56 14.22
40
50.00 1270.0
5.12 130.05
5.12 130.05
8.50 215.90
40.00 1016.0
41.50 1054.1
43.00 1092.2
32
2.00
50.80
46.25 1174.8
0.56 14.22
42
52.00 1320.8
5.25 133.35
5.25 133.35
8.81 223.77
42.00 1066.8
43.62 1107.9
45.00 1143.0
32
2.00
50.80
48.25 1225.6
0.56 14.22
44
54.50 1384.3
5.50 139.70
5.50 139.70
9.18 233.17
44.00 1117.6
45.62 1158.7
47.25 1200.2
32
2.12
53.85
50.50 1282.7
0.56 14.22
46
56.75 1441.5
5.75 146.05
5.75 146.05
9.62 244.35
46.00 1168.4
47.75 1212.9
49.50 1257.3
36
2.12
53.85
52.75 1339.9
0.56 14.22
48
59.50 1511.3
6.00 152.40
6.00 152.40
10.12 257.05
48.00 1219.2
49.88 1267.0
51.50 1308.1
28
2.38
60.45
55.25 1403.4
0.56 14.22
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.
-
Class 400 Series A dimensions at NPS 38 and larger also apply to Class 400 Series B flanges.
-
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 + raised face, or with raised face removed (the latter is nonstandard).
- WNF = Weld Neck Flange.
-
The large end of the hub may be straight or tapered.
