BS10 Standard Flanges Table F

BS10 Table F

N.B. SIZE
D
K
L
A
C
N1
N2
B
H1
H2
R1
R2
HOLES
IN
mm
 
 
 
 
 
 
 
 
 
 
 
 
 
½”
15
95.3
66.8
14.5
21.3
4.8
27.0
33.3
22.4
9.5
22.2
6.4
1.6
4
¾”
20
101.6
73.2
14.5
26.7
4.8
33.3
38.1
27.7
11.1
22.2
6.4
1.6
4
1″
25
114.3
82.6
14.5
33.5
4.8
42.9
47.6
34.6
11.1
22.2
6.4
1.6
4
1 ¼”
32
120.7
87.4
14.5
42.2
6.4
49.2
55.6
43.2
11.1
25.4
6.4
1.6
4
1 ½”
40
133.4
98.6
14.5
48.3
6.4
58.7
61.9
49.5
12.7
28.6
6.4
1.6
4
2″
50
152.4
114.3
17.5
60.5
7.9
69.9
74.6
62.0
12.7
28.6
6.4
1.6
4
2 ½”
65
165.1
127.0
17.5
73.2
7.9
82.6
90.5
74.7
15.9
31.8
6.4
1.6
4
3″
80
184.2
146.1
17.5
88.9
9.7
101.6
106.4
90.7
15.9
34.9
6.4
1.6
4
3 ½”
88
203.2
165.1
17.5
101.6
9.7
114.3
119.1
103.4
17.5
34.9
6.4
1.6
4
4″
100
215.9
177.8
17.5
114.3
9.7
130.2
133.4
116.1
19.1
41.3
9.5
3.2
4
5″
125
254.0
209.6
17.5
141.2
12.7
152.4
160.3
143.8
19.1
44.5
9.5
3.2
8
6″
150
279.4
235.0
17.5
168.4
12.7
184.2
185.7
171.7
19.1
47.6
9.5
3.2
8
8″
200
336.6
292.1
17.5
219.2
12.7
241.3
241.3
221.5
22.2
50.8
9.5
3.2
8
10″
250
406.4
355.6
22.2
273.1
16.0
292.1
298.5
276.4
27.0
63.5
9.5
3.2
8
12″
300
457.2
406.4
22.2
323.9
19.1
342.9
349.3
325.9
28.6
69.9
9.5
4.8
12
14″
350
527.1
469.9
25.4
355.6
22.2
406.4
-
359.2
-
73.0
9.5
4.8
12
16″
400
577.9
520.7
25.4
406.4
22.2
-
-
410.5
-
-
-
-
12
18″
450
641.4
584.2
25.4
457.2
25.4
-
-
461.8
-
-
-
-
12
20″
500
704.9
641.4
25.4
508.0
28.6
-
-
513.1
-
-
-
-
16
24″
600
825.5
755.7
28.7
609.6
31.8
-
-
616.0
-
-
-
-
16