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Class 1500 Orifice Flanges, Welding Neck
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| Nominal Pipe Size |
Outside Diameter of Raised Face - R |
Outside Diameter of Flange - O |
Thickness of Flange, Min. - C |
Length Through Hub |
Ring Type Joint |
Diamter of Hub - X |
Hub Diameter at Beginning of Chamfer - A |
Bore - B |
Diameter of Pressure Connection - TT |
Drilling Template |
Length of Stud Bolts [(4)(5)] |
| Groove number |
Pitch Diameter - P |
Groove Depth - E |
Groove Width - F |
Radius at Bottom - rmax |
Special Oval Ring Height - W |
Bolt Circle |
Number of Holes |
Diameter of Holes |
Diameter of Bolts |
Raised Face |
Ring Joint |
| 1" |
2.00 |
5.88 |
1.50 |
3.25 |
R16 |
2.000 |
0.250 |
0.344 |
0.03 |
1.00 |
2.06 |
1.32 |
See Note (5). |
1/4 |
4.00 |
4 |
1.00 |
7/8 |
6.00 |
6.25 |
| 1-1/2" |
2.88 |
7.00 |
1.50 |
3.50 |
R20 |
2.688 |
0.250 |
0.344 |
0.03 |
1.00 |
2.75 |
1.90 |
1/4 |
4.88 |
4 |
1.12 |
1 |
6.25 |
6.50 |
| 2" |
3.62 |
8.50 |
1.50 |
4.00 |
R24 |
3.750 |
0.312 |
0.469 |
0.03 |
1.06 |
4.12 |
2.38 |
1/4 |
6.50 |
8 |
1.00 |
7/8 |
6.00 |
6.50 |
| 2-1/2" |
4.12 |
9.62 |
1.62 |
4.12 |
R27 |
4.250 |
0.312 |
0.469 |
0.03 |
1.06 |
4.88 |
2.88 |
1/4 |
7.50 |
8 |
1.12 |
1 |
6.50 |
7.00 |
| 3" |
5.00 |
10.50 |
1.88 |
4.62 |
R35 |
5.375 |
0.312 |
0.469 |
0.03 |
1.06 |
5.25 |
3.50 |
3/8 |
8.00 |
8 |
1.25 |
1-1/8 |
7.25 |
7.25 |
| 4" |
6.19 |
12.25 |
2.12 |
4.88 |
R39 |
6.375 |
0.312 |
0.469 |
0.03 |
1.06 |
6.38 |
4.50 |
1/2 |
9.50 |
8 |
1.38 |
1-1/4 |
8.00 |
8.50 |
| 6" |
8.50 |
15.50 |
3.25 |
6.75 |
R46 |
8.312 |
0.375 |
0.531 |
0.06 |
1.12 |
9.00 |
6.63 |
1/2 |
12.50 |
12 |
1.50 |
1-3/8 |
10.50 |
11.00 |
| 8" |
10.62 |
19.00 |
3.62 |
8.38 |
R50 |
10.625 |
0.438 |
0.656 |
0.06 |
1.31 |
11.50 |
8.63 |
1/2 |
15.50 |
12 |
1.75 |
1-5/8 |
11.75 |
12.25 |
| 10" |
12.75 |
23.00 |
4.25 |
10.00 |
R54 |
12.750 |
0.438 |
0.656 |
0.06 |
1.31 |
14.50 |
10.75 |
1/2 |
19.00 |
12 |
2.00 |
1-7/8 |
13.50 |
14.00 |
| 12" |
15.00 |
26.50 |
4.88 |
11.12 |
R58 |
15.000 |
0.562 |
0.806 |
0.06 |
1.56 |
17.75 |
12.75 |
1/2 |
22.50 |
16 |
2.12 |
2 |
15.00 |
15.75 |
| 14" |
16.25 |
29.50 |
5.25 |
11.75 |
R63 |
16.500 |
0.625 |
1.062 |
0.09 |
1.75 |
19.50 |
14.00 |
1/2 |
25.00 |
16 |
2.38 |
2-1/4 |
16.25 |
17.52 |
| 16" |
18.50 |
32.50 |
5.75 |
12.25 |
R67 |
18.500 |
0.688 |
1.188 |
0.09 |
2.00 |
21.75 |
16.00 |
1/2 |
27.75 |
16 |
2.62 |
2-1/2 |
17.75 |
19.00 |
| 18" |
21.00 |
36.00 |
6.38 |
12.88 |
R71 |
21.000 |
0.688 |
1.188 |
0.09 |
2.00 |
23.50 |
18.00 |
1/2 |
30.50 |
16 |
2.88 |
2-3/4 |
19.75 |
21.00 |
| 20" |
23.00 |
38.75 |
7.00 |
14.00 |
R75 |
23.000 |
0.688 |
1.312 |
0.09 |
2.12 |
25.25 |
20.00 |
1/2 |
32.75 |
16 |
3.12 |
3 |
21.50 |
22.50 |
| 24" |
27.25 |
46.00 |
8.00 |
16.00 |
R79 |
27.250 |
0.812 |
1.438 |
0.09 |
2.31 |
30.00 |
24.00 |
1/2 |
39.00 |
16 |
3.62 |
3-1/2 |
24.50 |
26.00 |
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General Note: Dimensions are in inches.
Notes:
- Other NPT sizes may be furnished if required.
- All other dimensions are in accordance with ASME B16.5.
- In conformance with ASME B16.5, stud bolt lengths do not include point heights.
- Bolt lengths for raised face flanges include allowance for orifice and gasket thickness of 0.25 in. for NPS
1 - 12 and 0.38 in. for NPS 14 - 24. Bolt lengths for
ring type joint flanges include allowance of 0.62 in. for NPS 1 - 6.
- Bore is to be specified by the purchaser.
- Ring joint flanges larger than NPS 6 will require angular meter taps as shown in Fig 3.
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