| ITALIAN STANDARDS UNI 2283 WELD NECK FLANGE RF PN 25 |
| Directions for the designation |
d1 |
a |
b |
D |
f |
h |
h1 |
m |
r |
s |
Holes |
Screws |
Weight* |
Rated
Diameter |
External diameter
of the pipe |
Kg |
| 15 |
20 |
21 |
65 |
16 |
95 |
14 |
38 |
6 |
30 |
4 |
2,5 |
4 |
M 12 |
0,83 |
| 21,3 |
22,5 |
32 |
0,83 |
| 20 |
25 |
26 |
75 |
18 |
105 |
14 |
40 |
6 |
38 |
4 |
2,5 |
4 |
M 12 |
1,15 |
| 26,9 |
28 |
40 |
1,15 |
| 25 |
30 |
31 |
85 |
18 |
115 |
14 |
40 |
6 |
42 |
4 |
2,8 |
4 |
M 12 |
1,39 |
| 33,7 |
34,5 |
46 |
1,38 |
| 32 |
38 |
39 |
100 |
18 |
140 |
18 |
42 |
6 |
52 |
6 |
3 |
4 |
M 16 |
2,03 |
| 42,4 |
43,5 |
56 |
2,01 |
| 40 |
44,5 |
45,5 |
110 |
18 |
150 |
18 |
45 |
7 |
60 |
6 |
3 |
4 |
M 16 |
2,35 |
| 48,3 |
49,5 |
64 |
2,33 |
| 50 |
57 |
58 |
125 |
20 |
165 |
18 |
48 |
8 |
72 |
6 |
3,5 |
4 |
M 16 |
3,11 |
| 60,3 |
61,5 |
75 |
3.08 |
| 65 |
76,1 |
77 |
145 |
22 |
185 |
18 |
52 |
10 |
90 |
6 |
3,5 |
8 |
M 16 |
3,95 |
| 80 |
88,9 |
90 |
160 |
24 |
200 |
18 |
58 |
12 |
105 |
8 |
3,7 |
8 |
M 16 |
4,98 |
| 100 |
108 |
109 |
190 |
24 |
235 |
22 |
65 |
12 |
128 |
8 |
3,7 |
8 |
M 20 |
6,85 |
| 114,3 |
115,5 |
134 |
6,70 |
| 125 |
133 |
134 |
220 |
26 |
270 |
25 |
68 |
12 |
155 |
8 |
4 |
8 |
M 22 |
9,42 |
| 139,7 |
141 |
162 |
9,20 |
| 150 |
159 |
161 |
250 |
28 |
300 |
25 |
75 |
12 |
182 |
10 |
5 |
8 |
M 22 |
12,4 |
| 168,3 |
170,5 |
192 |
12,0 |
| 175 |
193,7 |
195,5 |
280 |
28 |
330 |
25 |
75 |
15 |
218 |
10 |
5 |
12 |
M 22 |
13,6 |
| 200 |
219,1 |
221 |
310 |
30 |
360 |
25 |
80 |
16 |
244 |
10 |
5 |
12 |
M 22 |
16,8 |
| 250 |
267 |
269 |
370 |
32 |
425 |
30 |
88 |
18 |
292 |
12 |
5,5 |
12 |
M 27 |
23,8 |
| 273 |
275 |
298 |
23,3 |
| 300 |
323,9 |
326 |
430 |
34 |
485 |
30 |
92 |
18 |
352 |
12 |
6 |
16 |
M 27 |
30,5 |
| 350 |
355,6 |
357,5 |
490 |
38 |
555 |
33 |
100 |
20 |
398 |
12 |
6,4 |
16 |
M 30 |
47,6 |
| 368 |
370 |
44,5 |
| 400 |
406,4 |
408,5 |
550 |
40 |
620 |
36 |
110 |
20 |
452 |
12 |
7,3 |
16 |
M 33 |
62,1 |
| 419 |
421 |
58,3 |
| 450 |
457,2 |
459 |
600 |
40 |
670 |
36 |
115 |
20 |
492 |
12 |
8 |
20 |
M 33 |
67,8 |
| 500 |
508 |
510 |
660 |
44 |
730 |
36 |
125 |
20 |
558 |
12 |
8 |
20 |
M 33 |
88,8 |
| 600 |
609,6 |
611,5 |
770 |
46 |
845 |
39 |
125 |
20 |
660 |
12 |
8 |
20 |
M 36 x 3 |
114 |
| 700 |
711,2 |
715 |
875 |
46 |
960 |
42 |
125 |
20 |
760 |
12 |
10 |
24 |
M 39 x 3 |
138 |
| 800 |
812,8 |
817 |
990 |
50 |
1085 |
48 |
135 |
22 |
865 |
12 |
11 |
24 |
M 45 x 3 |
185 |
| 900 |
914,4 |
918 |
1090 |
54 |
1185 |
48 |
145 |
24 |
968 |
12 |
12 |
28 |
M 45 x 3 |
224 |
| 1000 |
1016 |
1020 |
1210 |
58 |
1320 |
56 |
155 |
24 |
1070 |
16 |
13 |
28 |
M 52 x 3 |
293 |
| * |
The weight is approximate and calculated on base 7.85 Kg/dm3 |
|
