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Carbon and Stainless Steel Flanges - ASME/ANSI Class 1500
ASME/ANSI B16.5-1996
Pipe Flanges and Flanged Fittings - Class 1500 Flanges - outside
and inside diameters, bolt circles, numbers and diameters of bolts
for Weld neck, Threaded, Slip-on, Lap joint, Socket weld and Blind
flanges.
Carbon and stainless steel qualities
according ASME B16.5 Table 1A.
Pipe Size
(inches) |
Outside Diameter
(inches) |
Inside Diameter
(inches) |
Number of Bolt
Holes |
Bolt Hole Diameter
(inches)1) |
Bolt Circle
(inches) |
| 1/2 |
4-3/4 |
0.88 |
4 |
7/8 |
3-1/4 |
| 3/4 |
5-1/8 |
1.09 |
4 |
7/8 |
3-1/2 |
| 1 |
5-7/8 |
1.36 |
4 |
1 |
4 |
| 1-1/4 |
6-1/4 |
1.70 |
4 |
1 |
4-3/8 |
| 1-1/2 |
7 |
1.95 |
4 |
1-1/8 |
4-7/8 |
| 2 |
8-1/2 |
2.44 |
8 |
1 |
6-1/2 |
| 2-1/2 |
9-5/8 |
2.94 |
8 |
1-1/8 |
7-1/2 |
| 3 |
10-1/2 |
- |
8 |
1-1/4 |
8 |
| 4 |
10 |
- |
8 |
1-3/8 |
9-1/2 |
| 5 |
14-3/4 |
- |
8 |
1-5/8 |
11-1/2 |
| 6 |
15-1/2 |
- |
12 |
1-1/4 |
12-1/2 |
| 8 |
19 |
- |
12 |
1-3/4 |
15-1/2 |
| 10 |
23 |
- |
12 |
2 |
19 |
| 12 |
26-1/2 |
- |
16 |
2-1/8 |
22-1/2 |
| 14 |
29-1/2 |
- |
16 |
2-3/8 |
25 |
| 16 |
32-1/2 |
- |
16 |
2-5/8 |
27-3/4 |
| 18 |
36 |
- |
16 |
2-7/8 |
30-1/2 |
| 20 |
38-3/4 |
- |
16 |
3-1/8 |
32-3/4 |
| 24 |
46 |
- |
16 |
3-5/8 |
39 |
1) Recommended bolts are 1/8 smaller
than the nominal bolt hole diameters shown.
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