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ASME B16.47 Series A
(MSS SP-44) Flanges
Class 900 lb |
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| Pipe |
Flange Data |
Hub Data |
Raised Face |
Drilling Data |
Radius |
Nominal Pipe
Size |
A |
C |
D |
E |
F |
G |
H |
I |
J |
R |
| Overall Oiameter |
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 |
inch
mm |
| 26 |
42.75 1085.9 |
5 50
139.70 |
6 31
160.27 |
11.25 285.75 |
26 00 660.40 |
30 50 774.70 |
29 50 749.30 |
20 |
2.88
73.15 |
37 50 952.50 |
0.44
11.18 |
| 28 |
46.00 1168.4 |
5.62
142.75 |
6.75
171.45 |
11.75 298.45 |
28.00 711.20 |
32.75 831.85 |
31.50 800.10 |
20 |
3.12
79.25 |
40.25 1022.4 |
0.50 12.70 |
| 30 |
48.50 1231.9 |
5.88
149.35 |
7.18
182.37 |
12.25 311.15 |
30.00 762.00 |
35.00 389.00 |
33.75 857.25 |
20 |
3.12
79.25 |
42.75 1085.9 |
0.50 12.70 |
| 32 |
51.75 1314.5 |
6.25
158.75 |
7.62
193.55 |
13.00 330.20 |
32.00 812.80 |
37.25 946.15 |
36.00 914.40 |
20 |
3.38
85.85 |
45.50 1155.7 |
0.50 12.70 |
| 34 |
55.00 1397.0 |
6.50
165.10 |
8.06
204.72 |
13.75 349.25 |
34.00 863.60 |
39.62 1006.4 |
38.00 965.20 |
20 |
3.62
91.95 |
48.25 1225.6 |
0.56 14.22 |
| 36 |
57.50 1460.5 |
6.75
171.45 |
8.44
214.38 |
14.25 361.95 |
36.00 914.40 |
41.88 1063.8 |
40.25 1022.4 |
20 |
3.62
91.95 |
50.75 1289.1 |
0.56 14.22 |
| 38 |
57.50 1460.5 |
7 50
190.50 |
8.50
215.90 |
13.88 352.55 |
38.00 965.20 |
42.25 1073.2 |
43.25 1098.6 |
20 |
3.62
91.95 |
50.75 1289.1 |
0.75 19.05 |
| 40 |
59.50 1511.3 |
7.75
196.85 |
8.81
223.77 |
14.31 363.47 |
40.00 1016.0 |
44.38 1127.3 |
45.75 1162.1 |
24 |
3.62
91.95 |
52.75 1339.9 |
0.81 20.57 |
| 42 |
61.50 1562.1 |
8.12
206.25 |
9.12
231.65 |
14.62 371.35 |
42.00 1066.8 |
46.31 1176.3 |
47 75 1212.9 |
24 |
3.62
91.95 |
54.75 1390.7 |
0.81 20.57 |
| 44 |
64.88 1648.0 |
8.44
214.38 |
9.56
242 82 |
15.38 390.65 |
44.00 1117.6 |
48.62 1235.0 |
50.00 1270.0 |
24 |
3.88
98.55 |
57.62 1463.6 |
0.88 22.35 |
| 46 |
68.25 1733.6 |
8.88
225.55 |
10.06
255.52 |
16.18 410.97 |
46.00 1168.4 |
50.88 1292.4 |
52.50 1333.5 |
24 |
4.12 104.65 |
60.50 1536.7 |
0.88 22.35 |
| 48 |
70.25 1784.4 |
9.19
233.43 |
10.38
263.65 |
16.50 419.10 |
48.00 1219.2 |
52.88 1343.2 |
54.50 1384.3 |
24 |
4.12 104.65 |
62.50 1587.5 |
0.94 23.88 |
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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 900 Series A dimensions at NPS 38 and larger also apply to Class 900 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.
-
For ring joint facings see page 8-6. For weld end bevel see page 8-5.
-
For tolerances see page 8-4.
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