DIMENSION OF PIPE FLANGES AS PER TABLE BS- 10

Table D: For Working Steam Pressure upto 50 Ibs per sq. inch

Nominal
O.D of
Dia. of
Dia. of
No. of
Dia. of
Thickness
Pipe size
Pipe
Flange
Bolt Circle
Bolt
Bolt
1/2"
21.3
95.3
66.7
4
12.7
4.8
3/4"
26.7
101.6
73.0
4
12.7
4.8
1"
33.4
114.3
82.6
4
12.7
4.8
1 1/4"
42.2
120.7
87.6
4
12.7
6.4
1 1/2"
48.3
133.4
98.4
4
12.7
6.4
2"
60.3
152.4
114.3
4
15.9
7.9
2 1/2"
73.0
165.1
127.0
4
15.9
7.9
3"
88.9
184.2
146.1
4
15.9
9.5
3 1/2"
101.6
203.2
165.1
4
15.9
9.5
4"
114.3
215.9
177.8
4
15.9
9.5
5"
141.3
254.0
209.6
8
15.9
12.7
6"
168.3
279.4
228.6
8
15.9
12.7
7"
190.5
304.8
260.4
8
15.9
12.7
8"
219.1
336.6
292.1
8
15.9
12.7
9"
244.5
368.3
323.9
8
15.9
15.9
10"
273.0
406.4
355.6
8
19.1
15.9
12"
323.9
457.2
406.4
12
19.1
15.9
14"
355.6
527.1
469.9
12
22.2
19.1
16"
406.4
577.9
520.7
12
22.2
19.1
18"
457.2
641.4
584.2
12
22.2
22.2
20"
508.0
704.9
641.4
16
22.5
25.4
24"
609.6
825.5
755.7
16
25.4
28.6

Table E: For Working Steam Pressure 50 Ibs upto 100 Ibs per sq. inch

Nominal
Dia. of
Dia. of
No. of
Dia. of
Thickness
Pipe Size
Flange
Bolt Circle
Bolt
Bolt
1/2"
95.3
66.7
4
12.7
6.4
3/4"
101.6
73.0
4
12.7
6.4
1"
114.3
82.6
4
12.7
7.1
1 1/4"
120.7
87.3
4
12.7
7.9
1 1/2"
133.4
98.4
4
12.7
8.7
2"
152.4
114.3
4
15.9
9.5
2 1/2"
165.1
127.0
4
15.9
10.3
3"
184.2
146.1
4
15.9
11.1
3 1/2"
203.2
165.1
8
15.9
11.9
4"
215.9
177.8
8
15.9
12.7
5"
254.0
209.6
8
15.9
14.3
6"
279.4
228.6
8
19.1
17.5
7"
304.8
260.4
8
19.1
19.1
8"
336.6
292.1
8
19.1
19.1
9"
368.3
323.9
12
19.1
20.6
10"
406.4
355.6
12
19.1
22.2
12"
457.2
406.4
12
22.2
25.4
14"
527.2
469.9
12
22.2
25.4
16"
577.9
520.7
12
22.2
25.4
18"
641.4
584.2
16
22.2
28.6
20"
704.9
647.4
16
22.2
31.8
24"
825.5
755.7
16
25.4
38.1

Table F: For Working Steam Pressure above 100 Ibs and upto 150 Ibs per sq. inch

Nominal
O.D. of
Dia of
Dia of
No. of
Dia. of
Thickness
Pipe Size
Pipe
Flange
Bolt Circle
Bolt
Bolt
1/2"
21.3
95.3
66.7
4
12.7
9.5
3/4"
26.7
101.6
73.0
4
12.7
9.5
1"
33.4
120.7
87.3
4
15.9
9.5
1 1/4"
42.2
133.4
98.4
4
15.9
12.7
1 1/2"
48.3
139.7
104.8
4
15.9
12.7
2"
60.3
165.1
127.0
4
15.9
15.9
2 1/2"
73.0
184.2
146.1
8
15.9
15.9
3"
88.9
203.2
165.1
8
15.9
15.9
3 1/2"
101.6
215.9
177.8
8
15.9
19.1
4"
114.3
228.6
190.5
8
15.9
19.1
5"
141.3
279.4
235.0
8
19.1
22.2
6"
168.3
304.8
260.4
12
19.1
22.2
7"
190.3
336.6
292.1
12
19.1
22.2
8"
219.1
368.3
323.9
12
19.1
25.4
9"
244.5
406.4
355.6
12
22.2
25.4
10"
273.0
431.8
381.0
12
22.2
25.4
12"
323.0
489.0
438.2
16
22.2
28.6
14"
355.6
552.5
495.3
16
25.4
31.8
16"
406.4
609.6
552.5
20
25.4
31.8
18"
457.2
673.1
609.6
20
28.6
34.9
20"
508.0
736.6
673.1
24
28.6
38.1
24"
609.6
850.9
781.1
24
31.8
41.3

Table H: For Working Steam Pressure above 150 Ibs and upto 250 Ibs per sq. inch

Nominal
Dia of
Dia. of
No. of
Dia. of
Thickness
Pipe size
Flange
Bolt Circle
Bolt
Bolt
1/2"
114.3
82.6
4
15.9
12.7
3/4"
114.3
82.6
4
15.9
12.7
1"
120.78
87.3
4
15.9
14.3
1 1/4"
133.4
98.4
4
15.9
17.5
1 1/2"
139.7
104.8
4
15.9
17.5
2"
165.1
127.0
4
15.9
19.1
2 1/2"
184.2
146.1
8
15.9
19.1
3"
203.2
165.1
8
15.9
22.2
3 1/2"
215.9
177.8
8
15.9
22.2
4"
228.6
190.5
8
15.9
25.4
5"
279.4
235.0
8
19.1
28.6
6"
304.8
260.4
12
19.1
28.6
7"
336.6
292.1
12
19.1
31.8
8"
368.3
323.9
12
19.1
31.8
9"
406.4
355.6
12
22.2
34.9
10"
431.8
381.0
12
22.2
34.9
12"
489.0
438.2
16
22.2
38.1
14"
552.5
495.3
16
25.4
41.3
16"
609.6
552.5
20
25.4
44.5
18"
673.1
609.6
20
28.6
47.6
20"
736.6
673.1
24
28.6
50.8
24"
850.9
781.1
24
31.8
57.2


FORGED FLANGES TO ANSI B 16.5 (ASA 150 / 300 LBS)

Slip On Flange

Slip On Flange

Weld Neck Flange

Welding Neck Flange

Blind Flange

Blind Flange

150 LBS

Nominal
Flange
Dia of
Dia of
Length through Hub
Dia of Bore
Pipe Size
Pipe size
Dia
Bolt
Bolt
No. of
Thk. of
Dia of
S/O & S/W
W/N
L/J
S/O & S/W
L/J
Dia of
Depth of
Circle
Holes
Holes
Flange
Hub
R/F
Socket
(MM)
(INCH.)
O
A
D
C
E
Y
Y
Y
B
B
R
F
15
1/2
88.9
60.3
15.9
4
11.1
30.2
15.9
47.6
15.9
22.3
22.9
34.9
9.5
20
3/4
98.4
69.8
15.9
4
12.7
38.1
15.9
52.4
15.9
27.7
28.2
42.9
11.1
25
1
107.9
79.4
15.9
4
14.3
49.2
17.5
55.6
17.5
34.5
35.0
50.8
12.7
32
1 1/4
117.5
88.9
15.9
4
15.9
58.7
20.6
57.1
20.6
43.2
43.7
63.5
14.3
40
1 1/2
127.0
98.4
15.9
4
17.5
65.1
22.2
61.9
22.2
49.5
50.0
73.0
15.9
50
2
152.4
120.6
19.0
4
19.0
77.8
25.4
63.5
25.4
62.0
62.5
92.1
17.5
65
2 1/2
177.8
139.7
19.0
4
22.2
90.5
28.6
69.8
28.6
74.7
75.4
104.8
19.0
80
3
190.5
152.4
19.0
4
23.8
107.9
30.2
69.8
30.2
90.7
91.4
127.0
20.6
100
4
228.6
190.5
19.0
8
23.8
134.9
33.3
76.2
33.3
116.1
116.8
157.2
23.8
125
5
254.0
215.9
22.2
8
23.8
163.5
36.5
88.9
36.5
143.8
144.5
185.7
23.8
150
6
279.4
241.3
22.2
8
25.4
192.1
39.7
88.9
39.7
170.7
171.4
215.9
27.0
200
8
342.9
298.4
22.2
8
28.6
246.1
44.4
101.6
44.4
221.5
222.2
269.9
31.7
250
10
406.4
361.9
25.4
12
30.2
304.8
49.2
101.6
49.2
276.3
277.4
323.8
33.3
300
12
482.6
431.8
25.4
12
31.8
365.1
55.6
114.3
55.6
327.1
328.2
381.0
39.7
350
14
533.4
476.2
28.6
12
34.9
400.0
57.1
127.0
79.4
359.1
360.2
412.7
41.3
400
16
596.9
539.7
28.6
16
36.5
457.2
63.5
127.0
87.3
410.5
411.2
469.9
44.4
450
18
635.0
577.8
31.7
16
39.7
504.8
68.3
139.7
96.8
461.8
462.3
533.4
49.2
500
20
698.5
635.0
31.7
20
42.9
558.8
73.0
144.5
103.2
513.1
514.3
584.2
54.0
600
24
812.8
749.3
34.9
20
47.6
663.6
82.5
152.4
111.1
615.9
615.9
692.1
63.5


300 LBS
Length through Hub
Dia of Bore
Nominal Pipe
Flange Dia
Dia of Bolt
Dia of Bolt
No. of
Thk. of
Dia of
S/O & S/W
W/N
L/J
S/O & S/W
L/J
Dia of
Depth of
Size
Circle
Holes
Holes
Flange
Hub
R/F
Socket
(MM)
(INCH.)
O
A
D
C
E
Y
Y
Y
B
B
R
F
15
1/2
95.2
66.7
15.9
4
14.3
38.1
22.2
52.4
22.2
22.3
22.9
34.9
9.5
20
3/4
117.5
82.5
19.0
4
15.9
47.6
25.4
57.1
25.4
27.7
28.2
42.9
11.1
25
1
123.8
88.9
19.0
4
17.5
54.0
27.0
61.9
27.0
34.5
35.0
50.8
12.7
32
1 1/4
133.3
98.4
19.0
4
19.0
63.5
27.0
65.1
27.0
43.2
43.7
63.5
14.3
40
1 1/2
155.6
114.3
22.2
4
20.6
69.8
30.2
68.3
30.2
49.5
50.0
73.0
15.9
50
2
165.1
127.0
19.0
8
22.2
84.1
33.3
69.8
33.3
62.0
62.5
92.1
17.5
65
2 1/2
190.5
149.2
22.2
8
25.4
100.0
38.1
76.2
38.1
74.7
75.4
104.8
19.0
80
3
209.5
168.3
22.2
8
28.6
117.5
42.9
79.4
42.9
90.7
91.4
127.0
20.6
100
4
254.0
200.0
22.2
8
31.8
146.0
47.6
85.7
47.6
116.1
116.8
157.2
23.8
125
5
279.4
234.9
22.2
8
34.9
177.8
50.8
98.4
50.8
143.8
144.5
185.7
-
150
6
317.5
269.9
22.2
12
36.5
206.4
52.4
98.4
52.4
170.7
171.4
215.9
-
200
8
381.0
330.2
25.4
12
41.3
260.3
61.9
111.1
61.9
221.5
222.2
269.9
-
250
10
444.5
387.3
28.6
16
47.6
320.7
66.7
117.5
95.2
276.3
277.4
323.8
-
300
12
520.7
450.8
31.7
16
50.8
374.6
73.0
130.2
101.6
327.1
328.2
381.0
-
350
14
584.2
514.3
31.7
20
54.0
425.4
76.2
142.9
111.1
359.1
360.2
412.7
-
400
16
647.7
571.5
34.9
20
57.2
482.6
82.5
146.0
120.6
410.5
411.2
469.9
-
450
18
711.2
628.5
34.9
24
60.3
533.4
88.9
158.7
130.2
461.8
462.3
533.4
-
500
20
774.7
685.8
34.9
24
63.5
587.4
95.2
161.9
139.7
513.1
514.3
584.2
-
600
24
914.4
812.8
41.3
24
69.8
701.7
106.4
168.3
152.4
615.9
615.9
692.1
-

Download: flange dimensions chart pdf


 

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