Flange – Weld Neck, ANSI Class 300, ASME B16.36, Orifice Weld Neck, Raised Face (in)
- Dimensions and tolerances in accordance with ANSI/ASME B16.36 for sizes 1/2″ to 24″.
- Carbon steel forgings in accordance with ASTM A105.
- Bolt circle diameters are 1/8 inch larger than bolt diameter.
- All dimensions except “Thickness of Flange C sizes 1″ are the same as a Weld Neck.
- Approximate weight is based on a orifice flange union which is a set of flanges, plate not included.
| Pipe Size(NPS) |
OutsideDiameter
of
Flange
A |
Diameterof
Raised
Face
B |
Thicknessof
Flange
C |
Diameterof
Bore
D |
Diameterof Hub
at Weld
H |
Diameterof Hub
at Base
J |
Lengthof Hub
K |
Numberof
Bolt
Holes |
Diameterof
Bolt
Holes |
BoltCircle
Diameter
P |
Approx.Weight
Per
Union
(lb) |
| 1/2 |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
| 3/4 |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
| 1 |
4 7/8 |
2 |
1 1/2 |
1.049 |
1.315 |
2 1/8 |
2 7/16 |
4 |
3/4 |
3 1/2 |
18 |
| 1 1/4 |
5 1/4 |
2 1/2 |
1 1/2 |
1.380 |
1.660 |
2 1/2 |
2 9/16 |
4 |
3/4 |
3 7/8 |
20 |
| 1 1/2 |
6 1/8 |
2 7/8 |
1 1/2 |
1.610 |
1.900 |
2 3/4 |
2 11/16 |
4 |
7/8 |
4 1/2 |
25 |
| 2 |
6 1/2 |
3 5/8 |
1 1/2 |
2.067 |
2.375 |
3 5/16 |
2 3/4 |
8 |
3/4 |
5 |
27 |
| 2 1/2 |
7 1/2 |
4 1/8 |
1 1/2 |
2.469 |
2.875 |
3 15/16 |
3 |
8 |
7/8 |
5 7/8 |
35 |
| 3 |
8 1/4 |
5 |
1 1/2 |
3.068 |
3.500 |
4 5/8 |
3 1/8 |
8 |
7/8 |
6 5/8 |
43 |
| 3 1/2 |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
| 4 |
10 |
6 3/16 |
1 1/2 |
4.026 |
4.500 |
5 3/4 |
3 3/8 |
8 |
7/8 |
7 7/8 |
66 |
| 5 |
11 |
7 5/16 |
1 1/2 |
5.047 |
5.563 |
7 |
3 7/8 |
8 |
7/8 |
9 1/4 |
78 |
| 6 |
12 1/2 |
8 1/2 |
1 1/2 |
6.065 |
6.625 |
8 1/8 |
3 7/8 |
12 |
7/8 |
10 5/8 |
106 |
| 8 |
15 |
10 5/8 |
1 5/8 |
7.981 |
8.625 |
10 1/4 |
4 3/8 |
12 |
1 |
13 |
152 |
| 10 |
17 1/2 |
12 3/4 |
1 7/8 |
10.020 |
10.750 |
12 5/8 |
4 5/8 |
16 |
1 1/8 |
15 1/4 |
216 |
| 12 |
20 1/2 |
15 |
2 |
12.oo |
12.750 |
14 3/4 |
5 1/8 |
16 |
1 1/4 |
17 3/4 |
327 |
| 14 |
23 |
16 1/4 |
2 1/8 |
13.25 |
14.00 |
16 3/4 |
5 5/8 |
20 |
1 1/4 |
20 1/4 |
448 |
| 16 |
25 1/2 |
18 1/2 |
2 1/4 |
15.25 |
16.00 |
19 |
5 3/4 |
20 |
1 3/8 |
22 1/2 |
596 |
| 18 |
28 |
21 |
2 3/8 |
17.25 |
18.00 |
21 |
6 1/4 |
24 |
1 3/8 |
24 3/4 |
741 |
| 20 |
30 1/2 |
23 |
2 1/2 |
19.25 |
20.00 |
23 1/8 |
6 3/8 |
24 |
1 3/8 |
27 |
887 |
| 22 |
33 |
25 1/4 |
2 5/8 |
21.25 |
22.00 |
25 1/4 |
6 1/2 |
24 |
1 5/8 |
29 1/4 |
1040 |
| 24 |
36 |
27 1/4 |
2 3/4 |
23.25 |
24.00 |
27 5/8 |
6 5/8 |
24 |
1 5/8 |
32 |
1311 |
