Printable Version
Flange Specifications / Materials
Nominal Pipe Size |
"A" (O.D.) |
"B" (Thk.) |
"C" (RF Dia.) |
"D" (B.C.D.) |
# Bolt Holes |
Dia. of Bolt Holes |
Approx. Weight |
|
1/2"
|
3-1/2
|
7/16
|
1-3/8
|
2-3/8
|
4
|
5/8
|
2
|
|
3/4"
|
3-7/8
|
1/2
|
1-11/16
|
2-3/4
|
4
|
5/8
|
2
|
|
1"
|
4-1/4
|
9/16
|
2
|
3-1/8
|
4
|
5/8
|
2
|
|
1-1/4"
|
4-5/8
|
5/8
|
2-1/2
|
3-1/2
|
4
|
5/8
|
3
|
| 1-1/2" |
5
|
11/16
|
2-7/8
|
3-7/8
|
4
|
5/8
|
3
|
| 2" | 6 |
3/4
|
3-5/8
|
4-3/4
|
4
|
3/4
|
4
|
| 2-1/2" |
7
|
7/8
|
4-1/8
|
5-1/2
|
4
|
3/4
|
7
|
| 3" |
7-1/2
|
15/16
|
5
|
6
|
4
|
3/4
|
9
|
| 3-1/2" |
8-1/2
|
15/16
|
5-1/2
|
7
|
8
|
3/4
|
13
|
| 4" |
9
|
15/16
|
6-3/16
|
7-1/2
|
8
|
3/4
|
17
|
| 5" |
10
|
15/16
|
7-5/16
|
8-1/2
|
8
|
7/8
|
20
|
| 6" |
11
|
1
|
8-1/2
|
9-1/2
|
8
|
7/8
|
27
|
| 8" |
13-1/2
|
1-1/8
|
10-5/8
|
11-3/4
|
8
|
7/8
|
47
|
| 10" |
16
|
1-3/16
|
12-3/4
|
14-1/4
|
12
|
1
|
67
|
| 12" |
19
|
1-1/4
|
15
|
17
|
12
|
1
|
123
|
| 14" |
21
|
1-3/8
|
16-1/4
|
18-3/4
|
12
|
1-1/8
|
139
|
| 16" |
23-1/2
|
1-7/16
|
18-1/2
|
21-1/4
|
16
|
1-1/8
|
187
|
| 18" |
25
|
1-9/16
|
21
|
22-3/4
|
16
|
1-1/4
|
217
|
| 20" |
27-1/2
|
1-11/16
|
23
|
25
|
20
|
1-1/4
|
283
|
| 24" |
32
|
1-7/8
|
27-1/4
|
29-1/2
|
20
|
1-3/8
|
415
|
1/16" raised face included in flange thickness. |
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|
Nominal Pipe Size |
"A" (O.D.) |
"B" (Thk.) |
"C" (RF Dia.) |
"D" (B.C.D.) |
# Bolt Holes |
Dia. of Bolt Holes |
Approx. Weight |
| 1/2" | 3-3/4 | 9/16 | 1-3/8 | 2-5/8 | 4 | 5/8 | 2 |
| 3/4" | 4-5/8 | 5/8 | 1-11/16 | 3-1/4 | 4 | 3/4 | 3 |
| 1" | 4-7/8 | 11/16 | 2 | 3-1/2 | 4 | 3/4 | 4 |
| 1-1/4" | 5-1/4 | 3/4 | 2-1/2 | 3-7/8 | 4 | 3/4 | 6 |
| 1-1/2" | 6-1/8 | 13/16 | 2-7/8 | 4-1/2 | 4 | 7/8 | 7 |
| 2" | 6-1/2 | 7/8 | 3-5/8 | 5 | 8 | 3/4 | 8 |
| 2-1/2" | 7-1/2 | 1 | 4-1/8 | 5-7/8 | 8 | 7/8 | 12 |
| 3" | 8-1/4 | 1-1/8 | 5 | 6-5/8 | 8 | 7/8 | 16 |
| 3-1/2" | 9 | 1-3/16 | 5-1/2 | 7-1/4 | 8 | 7/8 | 21 |
| 4" | 10 | 1-1/4 | 6-3/16 | 7-7/8 | 8 | 7/8 | 28 |
| 5" | 11 | 1-3/8 | 7-5/16 | 9-1/4 | 8 | 7/8 | 37 |
| 6" | 12-1/2 | 1-7/16 | 8-1/2 | 10-5/8 | 12 | 7/8 | 48 |
| 8" | 15 | 1-5/8 | 10-5/8 | 13 | 12 | 1 | 79 |
| 10" | 17-1/2 | 1-7/8 | 12-3/4 | 15-1/4 | 16 | 1-1/8 | 122 |
| 12" | 20-1/2 | 2 | 15 | 17-3/4 | 16 | 1-1/4 | 183 |
| 14" | 23 | 2-1/8 | 16-1/4 | 20-1/4 | 20 | 1-1/4 | 241 |
| 16" | 25-1/2 | 2-1/4 | 18-1/2 | 22-1/2 | 20 | 1-3/8 | 315 |
| 18" | 28 | 2-3/8 | 21 | 24-3/4 | 24 | 1-3/8 | 414 |
| 20" | 30-1/2 | 2-1/2 | 23 | 27 | 24 | 1-3/8 | 515 |
| 24" | 36 | 2-3/4 | 27-1/4 | 32 | 24 | 1-5/8 | 800 |
1/16" raised face included in flange thickness. |
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The above information is just for reference and is based on steel machined screw plugs. The actual weights vary based on manufacturer and material type. Dimensions are in inches and weights are in pounds.
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