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| ANSI
B16.36 FORGED FLANGES |
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Unit: mm |
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| Class
300 Orifice Flanges |
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| Nominal Pipe size |
Outside Diam of Flange |
Thickness of Flanges (1) |
Diam of Hub at base |
Diam of raised face |
Diam of Hub Bevel |
Length thru Hub (1) |
Bore (B) |
Pitch Diam of Ring and Groove |
Ring Number |
Depth of jack screw slot |
Jack screw size |
Drilling Template |
Nominal Pipe size |
| Welding Neck |
Slip- on & threaded |
Welding Neck |
Slip- on |
| Raised Face |
Raised face |
Raised face |
Diam of bolt circle |
Number of Bolts |
Diam. Of Stud Bolts (inch) |
Diam. Of Bolt Holes |
Length of stud
bolts |
| D |
X |
G |
A |
Raised Face |
Raised Face |
P |
Raised face |
| 1 |
124 |
38.1 |
53.8 |
50.8 |
35.5 |
82.6 |
47.8 |
26.7 |
34.5 |
50.8 |
R16 |
9.7 |
Jack screw size for 1” thru 24” are those shown
for length and diameter of bolts |
88.9 |
4 |
5/8 |
17.5 |
139.7 |
1 |
| 1 ¼ |
133 |
38.1 |
63.5 |
63.5 |
42.2 |
84.1 |
46.0 |
35.1 |
43.2 |
60.3 |
R18 |
9.7 |
98.6 |
4 |
5/8 |
17.5 |
152.4 |
1 ¼ |
| 1 ½ |
155 |
38.1 |
69.9 |
73.2 |
48.3 |
85.9 |
47.8 |
40.9 |
49.5 |
68.3 |
R20 |
12.7 |
114.3 |
4 |
3/4 |
20.6 |
152.4 |
1 ½ |
| 2 |
165 |
38.1 |
84.1 |
91.9 |
60.5 |
85.9 |
49.3 |
52.6 |
62.0 |
82.6 |
R23 |
9.7 |
127.0 |
8 |
5/8 |
17.5 |
152.4 |
2 |
| 2 ½ |
191 |
38.1 |
100.1 |
104.6 |
73.2 |
88.9 |
50.8 |
62.7 |
74.7 |
101.6 |
R26 |
12.7 |
149.4 |
8 |
3/4 |
20.6 |
152.4 |
2 ½ |
| 3 |
210 |
38.1 |
117.3 |
127.0 |
88.9 |
88.9 |
52.3 |
78.0 |
90.7 |
123.8 |
R31 |
12.7 |
168.1 |
8 |
3/4 |
20.6 |
152.4 |
3 |
| 4 |
254 |
38.1 |
146.1 |
157.2 |
114.3 |
91.9 |
53.8 |
102.4 |
116.1 |
149.2 |
R37 |
12.7 |
200.2 |
8 |
3/4 |
20.6 |
152.4 |
4 |
| 5 |
279 |
38.1 |
177.8 |
185.7 |
141.2 |
101.6 |
53.8 |
128.3 |
143.8 |
181.0 |
R41 |
12.7 |
235.0 |
8 |
3/4 |
22.4 |
152.4 |
5 |
| 6 |
318 |
38.1 |
206.2 |
215.9 |
168.4 |
100.1 |
53.8 |
154.2 |
170.7 |
211.1 |
R45 |
12.7 |
269.7 |
12 |
3/4 |
22.4 |
152.4 |
6 |
| 8 |
381 |
41.1 |
260.4 |
269.7 |
219.2 |
111.3 |
62.0 |
202.7 |
221.5 |
269.9 |
R49 |
15.7 |
330.2 |
12 |
7/8 |
25.4 |
158.8 |
8 |
| 10 |
445 |
47.8 |
320.5 |
323.9 |
273.1 |
117.3 |
66.5 |
254.5 |
276.4 |
323.9 |
R53 |
19.1 |
387.4 |
16 |
1 |
28.4 |
165.1 |
10 |
| 12 |
521 |
50.8 |
374.7 |
381.0 |
323.9 |
130.0 |
73.2 |
304.8 |
327.2 |
381.0 |
R57 |
22.4 |
450.9 |
16 |
1 1/8 |
31.8 |
177.8 |
12 |
| 14 |
584 |
53.8 |
425.5 |
412.8 |
355.6 |
142.7 |
76.2 |
336.6 |
359.2 |
419.1 |
R61 |
22.4 |
514.4 |
20 |
1 1/8 |
31.8 |
184.2 |
14 |
| 16 |
648 |
57.2 |
482.6 |
469.9 |
406.4 |
146.1 |
82.6 |
387.4 |
410.5 |
469.9 |
R65 |
25.4 |
571.5 |
20 |
1 ¼ |
35.1 |
196.9 |
16 |
| 18 |
711 |
60.5 |
533.4 |
533.4 |
457.2 |
158.8 |
88.9 |
438.2 |
461.8 |
533.4 |
R69 |
25.4 |
628.7 |
24 |
1 ¼ |
35.1 |
203.2 |
18 |
| 20 |
775 |
63.5 |
587.2 |
584.2 |
508.0 |
162.1 |
95.3 |
489.0 |
513.1 |
584.4 |
R73 |
25.4 |
685.8 |
24 |
1 ¼ |
35.1 |
215.9 |
20 |
| 24 |
914 |
69.9 |
701.5 |
692.2 |
609.6 |
168.1 |
106.4 |
590.6 |
616.0 |
692.2 |
R77 |
31.8 |
812.8 |
24 |
1 ½ |
41.1 |
241.3 |
24 |
| Notes: |
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| (1)
For the Bore (B) of welding Neck Flanges other than standard weall thickness,
refer to 54. |
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| (2)
Class 300 welding Neck flanges of size 24" (609.6mm) and smaller will be
bored to match standard wall pipe unless otherwise specified |
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| (3) Class 300 orifice flanges will be
furnished with 0.06" (1.6mm) raised face, which is included in thickness
(t) and length through Hub (T) |
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| (4)
Bolt lengths for raised face flanges include allowance for orifice and gasket
thickness of 0.25" (6.4mm) for NPS 1-12 and 0.38" (9.7mm) for sizes
14-24. |
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| (5)
Unless otherwise specified unions of 1" (25.4mm) thru 24" (609.6mm)
furnished with carbon steel regular square |
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| headed
bolts with semifinished American standard heavy series hex nuts. |
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