f=2mm on class 150 and 300. =7mm on class 400 and higher.
Dimesions of WN flanges - ASME B16.5 Class 150
DN |
NPS |
Overall Diameter |
Inside Diameter |
Thickness of Flange(Min.) |
Overall Lenght |
Diameter at Bevel |
Diameter of Hub |
Diameter of Face |
Number of Bolts |
Diameter of Bolt Holes |
Diameter of Bolt Circle |
|
|
A |
B |
C |
D |
E |
F |
G |
H |
I |
J |
15 |
1/2 |
90 |
15.8 |
9.6 |
46 |
21.3 |
30 |
34.9 |
4 |
15.7 |
60.3 |
20 |
3/4 |
100 |
20.9 |
11.2 |
51 |
26.7 |
38 |
42.9 |
4 |
15.7 |
69.9 |
25 |
1 |
110 |
26.6 |
12.7 |
54 |
33.4 |
49 |
50.8 |
4 |
15.7 |
79.4 |
32 |
1 1/4 |
115 |
35.1 |
14.3 |
56 |
42.2 |
59 |
63.5 |
4 |
15.7 |
88.9 |
40 |
1 1/2 |
125 |
40.9 |
15.9 |
60 |
48.3 |
65 |
73 |
4 |
15.7 |
98.4 |
50 |
2 |
150 |
52.5 |
17.5 |
62 |
60.3 |
78 |
92.1 |
4 |
19.1 |
120.7 |
65 |
2 1/2 |
180 |
62.7 |
20.7 |
68 |
73 |
90 |
104.8 |
4 |
19.1 |
139.7 |
80 |
3 |
190 |
77.9 |
22.3 |
68 |
88.9 |
108 |
127 |
4 |
19.1 |
152.4 |
90 |
3 1/2 |
215 |
90.1 |
22.3 |
70 |
101.6 |
122 |
139.7 |
8 |
19.1 |
177.8 |
100 |
4 |
230 |
102.3 |
22.3 |
75 |
114.3 |
135 |
157.2 |
8 |
19.1 |
190.5 |
125 |
5 |
255 |
128.2 |
22.3 |
87 |
141.3 |
164 |
185.7 |
8 |
22.4 |
215.9 |
150 |
6 |
280 |
154.1 |
23.9 |
87 |
168.3 |
192 |
215.9 |
8 |
22.4 |
241.3 |
200 |
8 |
345 |
202.7 |
27 |
100 |
219.1 |
246 |
269.9 |
8 |
22.4 |
298.5 |
250 |
10 |
405 |
254.6 |
28.6 |
100 |
273 |
305 |
323.8 |
12 |
25.4 |
362 |
300 |
12 |
485 |
304.8 |
30.2 |
113 |
323.8 |
365 |
381 |
12 |
25.4 |
431.8 |
350 |
14 |
535 |
- |
33.4 |
125 |
355.6 |
400 |
412.8 |
12 |
28.4 |
476.3 |
400 |
16 |
595 |
- |
35 |
125 |
406.4 |
457 |
469.9 |
16 |
28.4 |
539.8 |
450 |
18 |
635 |
- |
38.1 |
138 |
457 |
505 |
533.4 |
16 |
31.75 |
577.9 |
500 |
20 |
700 |
- |
41.3 |
143 |
508 |
559 |
584.2 |
20 |
31.75 |
635 |
600 |
24 |
815 |
- |
46.1 |
151 |
610 |
663 |
692.2 |
20 |
35.1 |
749.3 |
Class 300
DN |
NPS |
Overall Diameter |
Inside Diameter |
Thickness of Flange(Min.) |
Overall Lenght |
Diameter at Bevel |
Diameter of Hub |
Diameter of Face |
Number of Bolts |
Diameter of Bolt Holes |
Diameter of Bolt Circle |
|
|
A |
B |
C |
D |
E |
F |
G |
H |
I |
J |
15 |
1/2 |
95 |
15.8 |
12.7 |
51 |
21.3 |
38 |
34.9 |
4 |
15.7 |
66.7 |
20 |
3/4 |
115 |
20.9 |
14.3 |
56 |
26.7 |
48 |
42.9 |
4 |
19 |
82.6 |
25 |
1 |
125 |
26.6 |
15.9 |
60 |
33.4 |
54 |
50.8 |
4 |
19 |
88.9 |
32 |
1 1/4 |
135 |
35.1 |
17.5 |
64 |
42.2 |
64 |
63.5 |
4 |
19 |
98.4 |
40 |
1 1/2 |
155 |
40.9 |
19.1 |
67 |
48.3 |
70 |
73 |
4 |
22.3 |
114.3 |
50 |
2 |
165 |
52.5 |
20.7 |
68 |
60.3 |
84 |
92.1 |
8 |
19 |
127 |
65 |
2 1/2 |
190 |
62.7 |
23.9 |
75 |
73 |
100 |
104.8 |
8 |
22.3 |
149.2 |
80 |
3 |
210 |
77.9 |
27 |
78 |
88.9 |
117 |
127 |
8 |
22.3 |
168.3 |
90 |
3 1/2 |
230 |
90.1 |
28.6 |
79 |
101.6 |
133 |
139.7 |
8 |
22.3 |
184.2 |
100 |
4 |
255 |
102.3 |
30.2 |
84 |
114.3 |
146 |
157.2 |
8 |
22.3 |
200 |
125 |
5 |
280 |
128.2 |
33.4 |
97 |
141.3 |
178 |
185.7 |
8 |
22.3 |
235 |
150 |
6 |
320 |
154.1 |
35 |
97 |
168.3 |
206 |
215.9 |
12 |
22.3 |
269.9 |
200 |
8 |
380 |
202.7 |
39.7 |
110 |
219.1 |
260 |
269.9 |
12 |
25.4 |
330.2 |
250 |
10 |
445 |
254.6 |
46.1 |
116 |
273 |
321 |
323.8 |
16 |
28.4 |
387.4 |
300 |
12 |
520 |
304.8 |
49.3 |
129 |
323.8 |
375 |
381 |
16 |
31.7 |
450.8 |
350 |
14 |
585 |
- |
52.4 |
141 |
355.6 |
425 |
412.8 |
20 |
31.7 |
514.4 |
400 |
16 |
650 |
- |
55.6 |
144 |
406.4 |
483 |
469.9 |
20 |
35 |
571.5 |
450 |
18 |
710 |
- |
58.8 |
157 |
457 |
533 |
533.4 |
24 |
35 |
628.6 |
500 |
20 |
775 |
- |
62 |
160 |
508 |
587 |
584.2 |
24 |
35 |
685.8 |
600 |
24 |
915 |
- |
68.3 |
167 |
610 |
702 |
692.2 |
24 |
41.1 |
812.8 |
Class 400
DN |
NPS |
Overall Diameter |
Inside Diameter |
Thickness of Flange(Min.) |
Overall Lenght |
Diameter at Bevel |
Diameter of Hub |
Diameter of Face |
Number of Bolts |
Diameter of Bolt Holes |
Diameter of Bolt Circle |
|
|
A |
B |
C |
D |
E |
F |
G |
H |
I |
J |
15 |
1/2 |
95 |
- |
14.3 |
52 |
21.3 |
38 |
34.9 |
4 |
15.7 |
66.7 |
20 |
3/4 |
115 |
- |
15.9 |
57 |
26.7 |
48 |
42.9 |
4 |
19 |
82.6 |
25 |
1 |
125 |
- |
17.5 |
62 |
33.4 |
54 |
50.8 |
4 |
19 |
88.9 |
32 |
1 1/4 |
135 |
- |
20.7 |
67 |
42.2 |
64 |
63.5 |
4 |
19 |
98.4 |
40 |
1 1/2 |
155 |
- |
22.3 |
70 |
48.3 |
70 |
73 |
4 |
22.3 |
114.3 |
50 |
2 |
165 |
- |
25.4 |
73 |
60.3 |
84 |
92.1 |
8 |
19 |
127 |
65 |
2 1/2 |
190 |
- |
28.6 |
79 |
73 |
100 |
104.8 |
8 |
22.3 |
149.2 |
80 |
3 |
210 |
- |
31.8 |
83 |
88.9 |
117 |
127 |
8 |
22.3 |
168.3 |
90 |
3 1/2 |
230 |
- |
35 |
86 |
101.6 |
133 |
139.7 |
8 |
25.4 |
184.2 |
100 |
4 |
255 |
- |
35 |
89 |
114.3 |
146 |
157.2 |
8 |
25.4 |
200 |
125 |
5 |
280 |
- |
38.1 |
102 |
141.3 |
178 |
185.7 |
8 |
25.4 |
235 |
150 |
6 |
320 |
- |
41.3 |
103 |
168.3 |
206 |
215.9 |
12 |
35.4 |
269.9 |
200 |
8 |
380 |
- |
47.7 |
117 |
219.1 |
260 |
269.9 |
12 |
28.4 |
330.2 |
250 |
10 |
445 |
- |
54 |
124 |
273 |
321 |
323.8 |
16 |
31.75 |
387.4 |
300 |
12 |
520 |
- |
57.2 |
137 |
323.8 |
375 |
381 |
16 |
35.1 |
450.8 |
350 |
14 |
585 |
- |
60.4 |
149 |
355.6 |
425 |
412.8 |
20 |
35.1 |
514.4 |
400 |
16 |
650 |
- |
63.5 |
152 |
406.4 |
483 |
469.9 |
20 |
38.1 |
571.5 |
450 |
18 |
710 |
- |
66.7 |
165 |
457 |
533 |
533.4 |
24 |
38.1 |
628.6 |
500 |
20 |
775 |
- |
69.9 |
168 |
508 |
587 |
584.2 |
24 |
41.1 |
685.8 |
600 |
24 |
915 |
- |
76.2 |
175 |
610 |
702 |
692.2 |
24 |
47.8 |
812.8 |
Class 600
DN |
NPS |
Overall Diameter |
Inside Diameter |
Thickness of Flange(Min.) |
Overall Lenght |
Diameter at Bevel |
Diameter of Hub |
Diameter of Face |
Number of Bolts |
Diameter of Bolt Holes |
Diameter of Bolt Circle |
|
|
A |
B |
C |
D |
E |
F |
G |
H |
I |
J |
15 |
1/2 |
95 |
- |
14.3 |
52 |
21.3 |
38 |
34.9 |
4 |
15.7 |
66.7 |
20 |
3/4 |
115 |
- |
15.9 |
57 |
26.7 |
48 |
42.9 |
4 |
19 |
82.6 |
25 |
1 |
125 |
- |
17.5 |
62 |
33.4 |
54 |
50.8 |
4 |
19 |
88.9 |
32 |
1 1/4 |
135 |
- |
20.7 |
67 |
42.2 |
64 |
63.5 |
4 |
19 |
98.4 |
40 |
1 1/2 |
155 |
- |
22.3 |
70 |
48.3 |
70 |
73 |
4 |
22.3 |
114.3 |
50 |
2 |
165 |
- |
25.4 |
73 |
60.3 |
84 |
92.1 |
8 |
19 |
127 |
65 |
2 1/2 |
190 |
- |
28.6 |
79 |
73 |
100 |
104.8 |
8 |
22.3 |
149.2 |
80 |
3 |
210 |
- |
31.8 |
83 |
88.9 |
117 |
127 |
8 |
22.3 |
168.3 |
90 |
3 1/2 |
230 |
- |
35 |
86 |
101.6 |
133 |
139.7 |
8 |
25.4 |
184.2 |
100 |
4 |
275 |
- |
38.1 |
102 |
114.3 |
152 |
157.2 |
8 |
25.4 |
215.9 |
125 |
5 |
330 |
- |
44.5 |
114 |
141.3 |
189 |
185.7 |
8 |
28.4 |
266.7 |
150 |
6 |
355 |
- |
47.7 |
117 |
168.3 |
222 |
215.9 |
12 |
28.4 |
292.1 |
200 |
8 |
420 |
- |
55.6 |
133 |
219.1 |
273 |
269.9 |
12 |
31.75 |
349.2 |
250 |
10 |
510 |
- |
63.5 |
152 |
273 |
343 |
323.8 |
16 |
35.1 |
431.8 |
300 |
12 |
560 |
- |
66.7 |
156 |
323.8 |
400 |
381 |
20 |
35.1 |
489 |
350 |
14 |
605 |
- |
69.9 |
165 |
355.6 |
432 |
412.8 |
20 |
38.1 |
527 |
400 |
16 |
685 |
- |
76.2 |
178 |
406.4 |
495 |
469.9 |
20 |
41.1 |
603.2 |
450 |
18 |
745 |
- |
82.6 |
184 |
457 |
546 |
533.4 |
20 |
44.5 |
654 |
500 |
20 |
815 |
- |
88.9 |
190 |
508 |
610 |
584.2 |
24 |
44.5 |
723.9 |
600 |
24 |
940 |
- |
101.6 |
203 |
610 |
718 |
692.2 |
24 |
50.8 |
838.2 |
Class 900
DN |
NPS |
Overall Diameter |
Inside Diameter |
Thickness of Flange(Min.) |
Overall Lenght |
Diameter at Bevel |
Diameter of Hub |
Diameter of Face |
Number of Bolts |
Diameter of Bolt Holes |
Diameter of Bolt Circle |
|
|
A |
B |
C |
D |
E |
F |
G |
H |
I |
J |
15 |
1/2 |
120 |
- |
22.3 |
60 |
21.3 |
38 |
34.9 |
4 |
22.3 |
82.6 |
20 |
3/4 |
130 |
- |
25.4 |
70 |
26.7 |
44 |
42.9 |
4 |
22.3 |
88.9 |
25 |
1 |
150 |
- |
28.6 |
73 |
33.4 |
52 |
50.8 |
4 |
25.4 |
101.6 |
32 |
1 1/4 |
160 |
- |
28.6 |
73 |
42.2 |
64 |
63.5 |
4 |
25.4 |
111.1 |
40 |
1 1/2 |
180 |
- |
31.8 |
83 |
48.3 |
70 |
73 |
4 |
28.4 |
123.8 |
50 |
2 |
215 |
- |
38.1 |
102 |
60.3 |
105 |
92.1 |
8 |
25.4 |
165.1 |
65 |
2 1/2 |
245 |
- |
41.3 |
105 |
73 |
124 |
104.8 |
8 |
28.4 |
190.5 |
80 |
3 |
240 |
- |
38.1 |
102 |
88.9 |
127 |
127 |
8 |
25.4 |
190.5 |
100 |
4 |
290 |
- |
44.5 |
114 |
114.3 |
159 |
157.2 |
8 |
31.7 |
235 |
125 |
5 |
350 |
- |
50.8 |
127 |
141.3 |
190 |
185.7 |
8 |
35 |
279.4 |
150 |
6 |
380 |
- |
55.6 |
140 |
168.3 |
235 |
215.9 |
12 |
31.7 |
317.5 |
200 |
8 |
470 |
- |
63.5 |
162 |
219.1 |
298 |
269.9 |
12 |
38.1 |
393.7 |
250 |
10 |
545 |
- |
69.9 |
184 |
273 |
368 |
323.8 |
16 |
38.1 |
469.9 |
300 |
12 |
610 |
- |
79.4 |
200 |
323.8 |
419 |
381 |
20 |
38.1 |
533.4 |
350 |
14 |
640 |
- |
85.8 |
213 |
355.6 |
451 |
412.8 |
20 |
41.1 |
558.8 |
400 |
16 |
705 |
- |
88.9 |
216 |
406.4 |
508 |
469.9 |
20 |
44.4 |
616 |
450 |
18 |
785 |
- |
101.6 |
229 |
457 |
565 |
533.4 |
20 |
50.8 |
685.8 |
500 |
20 |
855 |
- |
108 |
248 |
508 |
622 |
584.2 |
20 |
53.8 |
749.3 |
600 |
24 |
1040 |
- |
139.7 |
292 |
610 |
749 |
692.2 |
20 |
66.55 |
901.7 |
Class 1500
DN |
NPS |
Overall Diameter |
Inside Diameter |
Thickness of Flange(Min.) |
Overall Lenght |
Diameter at Bevel |
Diameter of Hub |
Diameter of Face |
Number of Bolts |
Diameter of Bolt Holes |
Diameter of Bolt Circle |
|
|
A |
B |
C |
D |
E |
F |
G |
H |
I |
J |
15 |
1/2 |
120 |
- |
22.3 |
60 |
21.3 |
38 |
34.9 |
4 |
22.3 |
82.6 |
20 |
3/4 |
130 |
- |
25.4 |
70 |
26.7 |
44 |
42.9 |
4 |
22.3 |
88.9 |
25 |
1 |
150 |
- |
28.6 |
73 |
33.4 |
52 |
50.8 |
4 |
25.4 |
101.6 |
32 |
1 1/4 |
160 |
- |
28.6 |
73 |
42.2 |
64 |
63.5 |
4 |
25.4 |
111.1 |
40 |
1 1/2 |
180 |
- |
31.8 |
83 |
48.3 |
70 |
73 |
4 |
28.4 |
123.8 |
50 |
2 |
215 |
- |
38.1 |
102 |
60.3 |
105 |
92.1 |
8 |
25.4 |
165.1 |
65 |
2 1/2 |
245 |
- |
41.3 |
105 |
73 |
124 |
104.8 |
8 |
28.4 |
190.5 |
80 |
3 |
265 |
- |
47.7 |
117 |
88.9 |
133 |
127 |
8 |
31.7 |
203.2 |
100 |
4 |
310 |
- |
54 |
124 |
114.3 |
162 |
157.2 |
8 |
35 |
241.3 |
125 |
5 |
375 |
- |
73.1 |
156 |
141.3 |
197 |
185.7 |
8 |
41.1 |
292.1 |
150 |
6 |
395 |
- |
82.6 |
171 |
168.3 |
229 |
215.9 |
12 |
38.1 |
317.5 |
200 |
8 |
485 |
- |
92.1 |
213 |
219.1 |
292 |
269.9 |
12 |
44.4 |
393.7 |
250 |
10 |
585 |
- |
108 |
254 |
273 |
368 |
323.8 |
12 |
50.8 |
482.6 |
300 |
12 |
675 |
- |
123.9 |
283 |
323.8 |
451 |
381 |
16 |
53.8 |
571.5 |
350 |
14 |
750 |
- |
133.4 |
298 |
355.6 |
495 |
412.8 |
16 |
60.45 |
635 |
400 |
16 |
825 |
- |
146.1 |
311 |
406.4 |
552 |
469.9 |
16 |
66.55 |
704.8 |
450 |
18 |
915 |
- |
162 |
327 |
457 |
597 |
533.4 |
16 |
73.15 |
774.7 |
500 |
20 |
985 |
- |
177.8 |
356 |
508 |
641 |
584.2 |
16 |
79.25 |
831.8 |
600 |
24 |
1170 |
- |
203.2 |
406 |
610 |
762 |
692.2 |
16 |
91.9 |
990.6 |
Class 2500
DN |
NPS |
Overall Diameter |
Inside Diameter |
Thickness of Flange(Min.) |
Overall Lenght |
Diameter at Bevel |
Diameter of Hub |
Diameter of Face |
Number of Bolts |
Diameter of Bolt Holes |
Diameter of Bolt Circle |
|
|
A |
B |
C |
D |
E |
F |
G |
H |
I |
J |
15 |
1/2 |
135 |
- |
30.2 |
73 |
21.3 |
43 |
34.9 |
4 |
22.3 |
88.9 |
20 |
3/4 |
140 |
- |
31.8 |
79 |
26.7 |
51 |
42.9 |
4 |
22.3 |
95.2 |
25 |
1 |
160 |
- |
35 |
89 |
33.4 |
57 |
50.8 |
4 |
25.4 |
108 |
32 |
1 1/4 |
185 |
- |
38.1 |
95 |
42.2 |
73 |
63.5 |
4 |
28.4 |
130.2 |
40 |
1 1/2 |
205 |
- |
44.5 |
111 |
48.3 |
79 |
73 |
4 |
31.75 |
146 |
50 |
2 |
235 |
- |
50.9 |
127 |
60.3 |
95 |
92.1 |
8 |
28.4 |
171.4 |
65 |
2 1/2 |
265 |
- |
57.2 |
143 |
73 |
114 |
104.8 |
8 |
31.75 |
196.8 |
80 |
3 |
305 |
- |
66.7 |
168 |
88.9 |
133 |
127 |
8 |
35.1 |
228.6 |
100 |
4 |
355 |
- |
76.2 |
190 |
114.3 |
165 |
157.2 |
8 |
41.1 |
273 |
125 |
5 |
420 |
- |
92.1 |
229 |
141.3 |
203 |
185.7 |
8 |
47.8 |
323.8 |
150 |
6 |
485 |
- |
108 |
273 |
168.3 |
235 |
215.9 |
8 |
53.8 |
368.3 |
200 |
8 |
550 |
- |
127 |
318 |
219.1 |
305 |
269.9 |
12 |
53.8 |
438.2 |
250 |
10 |
675 |
- |
165.1 |
419 |
273 |
375 |
323.8 |
12 |
66.55 |
539.8 |
300 |
12 |
760 |
- |
184.2 |
464 |
323.8 |
441 |
381 |
12 |
73.15 |
619.1 |
Tolerances of Welding Neck Flanges ASME B16.5
Outside Diameter (Note) |
Inside Diameter |
OD≤ 610mm = ± 2.0 mm | > 610 mm= ± 3.0 mm |
NPS ≤ 10 = ± 1.0 mm | 12≤ NPS ≤18 = 1.5 mm NPS ≥ 20 = + 3.0 mm / - 1.5 mm |
Diameter of Contact Face |
Diameter of Hub at Base (Note) |
2 mm RF= ± 1 mm |
Hub base ≤ 610 mm = ±1.6 mm | Hub base > 610 mm = ± 3.2 mm |
7 mm RF, Tongue & Groove / Male-Female = ± 0.5 mm |
|
Diameter of Hub at Point of Welding |
Drilling |
NPS≤ 5 = + 2.0mm / - 1.0 mm NPS≥ 6 = + 4.0 mm / - 1.0 mm |
Bolt Circle = ± 1.6 mm | Bolt Hole Spacing = ± 0.8 mm |
|
Eccentricity of Bolt Circle with Respect to Facing |
|
≤ 2½ = ± 0.8 mm max. | ≥ 3 = ± 1.6 mm max |
Thickness |
Length through Hub |
NPS≤ 18 = + 3.0 mm / - 0 | NPS≥ 20 = + 5.0 mm / - 0 |
NPS ≤ 4 = ± 1.5 mm | 5 ≤ NPS ≤12 = + 1.5 mm / - 3.0 mm NPS ≥ 12 = + 3.0 mm / - 5.0 mm |
Note:
These tolerances are not listed in ASME B16.5
|