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| Long
Welding Neck Flanges |
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| Class
2500 |
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Unit: mm |
| Nominal
Pipe Size |
Outside Diam |
O.D. of Raised face |
Hub Diameter of Bevel |
Diameter of Bore |
Thickness if Flange Min. |
Length through Hub |
Drilling Template |
| Diameter
or bolt circle |
Number of holes |
Diameter of holes |
| D |
E |
G |
t |
B |
L |
C |
|
d |
| ½ |
135 |
43 |
34.9 |
30.2 |
12.7 |
228.6 |
88.9 |
4 |
22.2 |
| ¾ |
140 |
51 |
42.9 |
31.8 |
19.1 |
228.6 |
95.2 |
4 |
22.2 |
| 1 |
160 |
57 |
50.8 |
35.0 |
25.4 |
228.6 |
108.0 |
4 |
25.4 |
| 1 ¼ |
185 |
73 |
63.5 |
38.1 |
31.8 |
228.6 |
130.2 |
4 |
28.6 |
| 1 ½ |
205 |
79 |
73.0 |
44.5 |
38.1 |
228.6 |
146.0 |
4 |
31.8 |
| 2 |
235 |
95 |
92.1 |
50.9 |
50.8 |
228.6 |
171.4 |
8 |
28.6 |
| 2 ½ |
265 |
114 |
104.8 |
57.2 |
63.5 |
304.8 |
196.8 |
8 |
31.8 |
| 3 |
305 |
133 |
127.0 |
66.7 |
76.2 |
304.8 |
228.6 |
8 |
35.0 |
| 4 |
553 |
165 |
157.2 |
76.2 |
101.6 |
304.8 |
273.0 |
8 |
41.3 |
| 5 |
420 |
203 |
185.7 |
92.1 |
127.0 |
304.8 |
323.8 |
8 |
47.6 |
| 6 |
485 |
235 |
215.9 |
108.0 |
152.4 |
304.8 |
368.3 |
8 |
54.0 |
| 8 |
550 |
305 |
269.9 |
127.0 |
203.2 |
304.8 |
438.2 |
12 |
54.0 |
| 10 |
675 |
375 |
323.8 |
165.1 |
254.0 |
406.4 |
539.8 |
12 |
66.7 |
| 12 |
760 |
441 |
381.0 |
184.2 |
304.8 |
406.4 |
619.1 |
12 |
73.0 |
| Notes: |
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| (1)
Bore (B) is the same as nominal pipe size. |
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| (2)
Welding Necks longer than listed are available in all sizes on special order. |
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