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DIMENSIONS OF CLASS 150 FLANGES (ANSI B 16.5) (in mm)
NominalPipe Size
FlangeDia'O'
Dia ofBolt Circle'A'
Dia of Bolt Holes'D'
No. ofHoles
Thk of Flange'C'
Diameter at Weld Bevel
Dia of Hub'E'
Length Through Hub
Bore 'B'
Dia ofR/FR
Depth ofSocketF
LengthofThreading
S/O & S/WY
W/NY
L/JY
S/O & S/WB
L/JB
1/2''
15
95.2
66.7
15.9
4
14.3
21.3
38.1
22.2
52.4
22.3
22.9
34.9
9.5
3/4''
20
117.5
82.5
19.0
26.7
47.6
25.4
57.1
27.7
28.2
42.9
11.1
1''
25
123.8
88.9
17.5
33.5
54.0
27.0
61.9
34.5
35.0
50.8
12.7
1 1/4''
32
133.3
98.4
42.2
63.5
65.1
43.2
43.7
20.6
1 1/2''
40
155.6
114.3
48.3
69.8
30.2
68.3
49.5
50.0
73.0
2''
50
165.1
127.0
60.4
84.1
33.3
62.0
62.5
92.1
2 1/2''
65
190.5
149.2
8
73.1
100.0
76.2
74.7
75.4
104.8
28.6
3''
80
209.5
168.3
79.4
90.7
91.4
3 1/2''
90
228.5
184.2
101.6
133.4
44.5
81.0
103.4
104.1
140.0
31.7
4''
100
254.0
200.0
31.8
146.0
57.6
85.7
116.1
116.8
157.2
23.8
5''
125
279.4
234.9
141.2
177.8
143.8
144.5
185.7
36.5
6''
150
317.5
269.9
12
168.4
206.4
170.7
171.4
215.9
39.7
8''
200
381.0
330.2
41.3
219.2
260.3
111.1
221.5
222.2
44.4
10''
250
444.5
387.3
16
273.0
320.7
276.3
277.4
323.8
49.2
12''
300
520.7
450.8
374.6
130.2
327.1
328.2
55.6
14''
350
584.2
514.3
355.6
425.4
142.9
359.1
360.2
412.7
16''
400
647.7
571.5
57.2
406.4
482.6
120.6
410.5
411.2
469.9
18''
450
711.2
628.5
24
60.3
457.2
533.4
158.7
461.8
462.3
20''
500
774.7
685.8
508.0
587.4
161.9
139.7
513.1
24''
600
914.4
812.8
609.6
701.7
106.4
152.4
615.9
692.1
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