Flanges Dimension & Grade

150# DIM & Weight
300# DIM & Weight
400# DIM & Weight
900# DIM & Weight
1500# DIM & Weight
2500# DIM & Weight

300# DIM & Weight

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
82.6

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