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Technical Info :
Flanges
Technical Info
Stainless Steel Pipes/Plates
Pipes- Carbon Steel/ Alloy Steel
Plates - Carbon Steel / Alloy Steel
Mild Steel Pipes
Buttweld Fittings
Socketweld Fittings
Flanges
Non Ferrous Metals
Selection of Material
Formula of Weight
150# DIM & Weight
300# DIM & Weight
600# DIM & Weight
900# DIM & Weight
1500# DIM & Weight
2500# 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
