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ITALIAN STANDARDS UNI 2278 PLATE FLANGE PN 16 |
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Directions for the designation |
d1 |
a |
b |
D |
f |
Holes |
screws |
Weight* |
Rated
Diameter |
External diameter
of the pipe |
Nominal |
Tolerance |
Kg |
|
15 |
20 |
20,5 |
+0,5 |
65 |
12 |
95 |
14 |
4 |
M 12 |
0,67 |
|
21,3 |
22 |
0,66 |
|
20 |
25 |
25,5 |
75 |
14 |
105 |
14 |
4 |
M 12 |
0,83 |
|
26,9 |
27,5 |
0,82 |
|
25 |
30 |
30,5 |
85 |
14 |
115 |
14 |
4 |
M 12 |
1,03 |
|
33,7 |
34 |
1,01 |
|
32 |
38 |
38,5 |
100 |
16 |
140 |
18 |
4 |
M 16 |
1,66 |
|
42,4 |
43 |
1,63 |
|
40 |
44,5 |
45 |
110 |
16 |
150 |
18 |
4 |
M 16 |
1,89 |
|
48,3 |
49 |
1,85 |
|
50 |
57 |
58 |
125 |
18 |
165 |
18 |
4 |
M 16 |
2,51 |
|
60,3 |
61,5 |
2,46 |
|
65 |
76,1 |
77 |
145 |
18 |
185 |
18 |
4 |
M 16 |
3,00 |
|
80 |
88,9 |
90 |
160 |
20 |
200 |
18 |
8** |
M 16 |
3,61 |
|
100 |
108 |
109 |
+1,0 |
180 |
22 |
220 |
18 |
8 |
M 16 |
4,60 |
|
114,3 |
115,5 |
4,40 |
|
125 |
133 |
134,5 |
210 |
24 |
250 |
18 |
8 |
M 16 |
6,19 |
|
139,7 |
141 |
5,92 |
|
150 |
159 |
160,5 |
240 |
24 |
285 |
22 |
8 |
M 20 |
7,63 |
|
168,3 |
170 |
7,17 |
|
175 |
193,7 |
195,5 |
270 |
26 |
315 |
22 |
8 |
M 20 |
9,16 |
|
200 |
219,1 |
221 |
295 |
26 |
340 |
22 |
12 |
M 20 |
9,77 |
|
250 |
267 |
269 |
355 |
32 |
405 |
25 |
12 |
M 22 |
16,6 |
|
273 |
275 |
16,0 |
|
300 |
323,9 |
326 |
410 |
32 |
460 |
25 |
12 |
M 22 |
19,3 |
|
350 |
355,6 |
358 |
470 |
36 |
520 |
25 |
16 |
M 22 |
29,4 |
|
368 |
370,5 |
27,3 |
|
400 |
406,4 |
409 |
+1,5 |
525 |
38 |
580 |
30 |
16 |
M 27 |
36,5 |
|
419 |
422 |
33,9 |
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* |
The weight is approximate and calculated on base 7.85 Kg/dm3
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** |
For PN10 the flange should have 4 holes
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