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Dimensions for Class 300 Flanges
Nom. Pipe Size (inches)
O
Q*
R
X
No. of Holes
Dia of Bolt Holes
Bolt Circle Dia
YY*
H
J
Y*
B
R
YV
BB
Z
C
T
1/2
95.3
14.2
35
38.1
4
15.7
66.5
52.3
21.3
15.7
22.4
22.4
3.0
22.4
22.9
9.7
23.6
15.7
3/4
117.3
15.7
43
47.8
4
19.1
82.6
57.2
26.7
20.8
25.4
27.7
3.0
25.4
28.2
11.2
29.0
15.7
1
124.0
17.5
51
53.8
4
19.1
88.9
62.0
33.5
26.7
26.9
34.5
3.0
26.9
35.1
12.7
35.8
17.5
1 1/4
133.4
19.1
64
63.5
4
19.1
98.6
65.0
42.2
35.1
26.9
43.2
4.8
26.9
43.7
14.2
44.5
20.6
1 1/2
155.4
20.6
73
69.9
4
22.4
114.3
68.3
48.3
40.9
30.2
49.5
6.4
30.2
50.0
15.7
50.5
22.4
2
165.1
22.4
92
84.1
8
19.1
127.0
69.9
60.5
52.6
33.3
62.0
7.9
33.3
62.5
17.5
63.5
28.4
21/2
190.5
25.4
105
100.1
8
22.4
149.4
76.2
73.2
62.7
38.1
74.7
7.9
38.1
75.4
19.1
76.2
31.8
3
209.6
28.4
127
117.3
8
22.4
168.1
79.2
88.9
78.0
42.9
90.7
9.7
42.9
91.4
20.6
92.2
31.8
31/2
228.6
30.2
140
133.4
8
22.4
184.2
81.0
101.6
90.2
44.5
103.4
9.7
44.5
104.1
104.9
36.6
4
254.0
31.8
157
146.1
8
22.4
200.2
85.9
114.3
102.4
47.8
116.1
11.2
47.8
116.8
117.6
36.6
5
279.4
35.1
186
177.8
8
22.4
235.0
98.6
141.2
128.3
50.8
143.8
11.2
50.8
144.5
144.5
42.9
6
317.5
36.6
216
206.2
12
22.4
269.7
98.6
168.4
154.2
52.3
170.7
12.7
52.3
171.5
171.5
46.0
8
381.0
41.1
270
260.4
12
25.4
330.2
111.3
219.2
202.7
62.0
221.5
12.7
62.0
222.3
222.3
50.8
10
444.5
47.8
324
320.5
16
28.4
387.4
117.3
273.1
254.5
66.5
276.4
12.7
95.3
277.4
276.4
55.6
12
520.7
50.8
381
374.7
16
31.8
450.9
130.0
323.9
304.8
73.2
327.2
12.7
101.6
328.2
328.7
60.5
14
584.2
53.8
413
425.5
20
31.8
514.4
142.7
355.6
To Be
76.2
359.2
12.7
111.3
360.2
360.4
63.5
16
647.7
57.2
470
482.6
20
35.1
571.5
146.1
406.4
To Specified by Purchaser
82.6
410.5
12.7
120.7
411.2
411.2
68.3
18
711.2
60.5
533
533.4
24
35.1
628.7
158.8
457.2
88.9
461.8
12.7
130.0
462.3
462.0
69.9
20
774.7
63.5
584
587.2
24
35.1
685.8
162.1
508.0
95.3
513.1
12.7
139.7
514.4
512.8
73.2
24
914.4
69.9
692
701.5
24
41.1
812.8
168.1
609.6
106.4
616.0
12.7
152.4
616.0
614.4
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Yash Impex
All rights reserved
Exporters and Suppliers of Iron & Steel Products
