½” – 24” Flanges Weight Chart
ANSI B16.5 – ½” – 24” Forged Flanges Weight Chart:
CLASS |
Nominal Pipe Size |
Slip On |
Threaded |
Socket Weld |
Lap Joint |
Blind |
Weld Neck |
150 lb |
½ |
1 |
1 |
2 |
1 |
2 |
2 |
|
¾ |
2 |
2 |
2 |
2 |
2 |
2 |
|
1 |
2 |
2 |
2 |
2 |
2 |
3 |
|
1¼ |
3 |
3 |
3 |
3 |
3 |
3 |
|
1½ |
3 |
3 |
3 |
3 |
4 |
4 |
|
2 |
5 |
5 |
5 |
5 |
5 |
6 |
|
2½ |
8 |
8 |
8 |
8 |
7 |
10 |
|
3 |
9 |
9 |
9 |
9 |
9 |
11.5 |
|
3½ |
11 |
12 |
11 |
11 |
13 |
12 |
|
4 |
13 |
13 |
13 |
13 |
17 |
16.5 |
|
5 |
15 |
15 |
15 |
15 |
20 |
21 |
|
6 |
19 |
19 |
19 |
19 |
27 |
26 |
|
8 |
30 |
30 |
30 |
30 |
47 |
42 |
|
10 |
43 |
43 |
43 |
43 |
70 |
54 |
|
12 |
64 |
64 |
64 |
64 |
123 |
88 |
|
14 |
90 |
90 |
90 |
105 |
140 |
114 |
|
16 |
106 |
98 |
98 |
140 |
180 |
140 |
|
18 |
130 |
130 |
130 |
160 |
220 |
165 |
|
20 |
165 |
165 |
165 |
195 |
285 |
197 |
|
22 |
185 |
185 |
185 |
245 |
355 |
225 |
|
24 |
220 |
220 |
220 |
275 |
430 |
268 |
CLASS |
Nominal Pipe Size |
Slip On |
Threaded |
Socket Weld |
Lap Joint |
Blind |
Weld Neck |
300 lb |
½ |
2 |
2 |
3 |
2 |
2 |
2 |
|
¾ |
3 |
3 |
3 |
3 |
3 |
3 |
|
1 |
3 |
3 |
3 |
3 |
4 |
4 |
|
1¼ |
4.5 |
4.5 |
4 |
4.5 |
6 |
5 |
|
1½ |
6.5 |
6.5 |
6 |
6.5 |
7 |
7 |
|
2 |
7 |
7 |
7 |
7 |
8 |
9 |
|
2½ |
10 |
10 |
10 |
10 |
12 |
12 |
|
3 |
13 |
14 |
13 |
14.5 |
16 |
18 |
|
3½ |
17 |
17 |
17 |
17 |
21 |
20 |
|
4 |
23.5 |
24 |
22 |
24 |
28 |
26.5 |
|
5 |
29 |
31 |
28 |
28 |
37 |
36 |
|
6 |
39 |
39 |
39 |
39 |
50 |
45 |
|
8 |
58 |
58 |
58 |
58 |
81 |
69 |
|
10 |
81 |
81 |
81 |
91 |
124 |
100 |
|
12 |
115 |
115 |
115 |
140 |
185 |
142 |
|
14 |
165 |
165 |
165 |
190 |
250 |
206 |
|
16 |
210 |
220 |
190 |
234 |
315 |
250 |
|
18 |
253 |
280 |
250 |
305 |
414 |
320 |
|
20 |
315 |
325 |
315 |
375 |
515 |
400 |
|
22 |
370 |
370 |
370 |
435 |
640 |
465 |
|
24 |
490 |
490 |
475 |
550 |
800 |
580 |
CLASS |
Nominal Pipe Size |
Slip On |
Threaded |
Socket Weld |
Lap Joint |
Blind |
Weld Neck |
400 lb |
½ |
2 |
2 |
2 |
2 |
2 |
3 |
|
¾ |
3 |
3 |
3 |
3 |
3 |
3.5 |
|
1 |
3.5 |
3.5 |
3.5 |
3.5 |
4 |
4 |
|
1¼ |
4.5 |
4.5 |
4.5 |
4.5 |
6 |
4.5 |
|
1½ |
6.5 |
6.5 |
6.5 |
6.5 |
8 |
8 |
|
2 |
8 |
8 |
8 |
8 |
10 |
10 |
|
2½ |
12 |
12 |
12 |
11 |
15 |
14 |
|
3 |
15 |
15 |
15 |
14 |
20 |
18 |
|
3½ |
21 |
21 |
21 |
20 |
29 |
26 |
|
4 |
26 |
26 |
26 |
25 |
33 |
35 |
|
5 |
31 |
31 |
31 |
29 |
44 |
43 |
|
6 |
44 |
44 |
44 |
42 |
61 |
57 |
|
8 |
67 |
67 |
67 |
64 |
100 |
89 |
|
10 |
91 |
91 |
91 |
110 |
155 |
125 |
|
12 |
130 |
130 |
130 |
152 |
226 |
175 |
|
14 |
191 |
191 |
191 |
210 |
310 |
233 |
|
16 |
253 |
253 |
253 |
280 |
398 |
295 |
|
18 |
310 |
310 |
310 |
345 |
502 |
360 |
|
20 |
378 |
378 |
378 |
420 |
621 |
445 |
|
22 |
405 |
405 |
405 |
455 |
720 |
505 |
|
24 |
539 |
539 |
539 |
615 |
936 |
640 |
CLASS |
Nominal Pipe Size |
Slip On |
Threaded |
Socket Weld |
Lap Joint |
Blind |
Weld Neck |
600 lb |
½ |
2 |
2 |
2 |
2 |
3 |
3 |
|
¾ |
3 |
3 |
3 |
3 |
4 |
4 |
|
1 |
4 |
4 |
4 |
4 |
4 |
4 |
|
1¼ |
5 |
5 |
5 |
5 |
6 |
6 |
|
1½ |
7 |
7 |
7 |
7 |
8 |
8 |
|
2 |
9 |
9 |
9 |
9 |
10 |
12 |
|
2½ |
13 |
13 |
13 |
12 |
15 |
18 |
|
3 |
16 |
16 |
16 |
15 |
20 |
23 |
|
3½ |
21 |
21 |
21 |
20 |
29 |
26 |
|
4 |
37 |
37 |
37 |
36 |
41 |
42 |
|
5 |
63 |
63 |
63 |
63 |
68 |
68 |
|
6 |
80 |
80 |
80 |
78 |
86 |
81 |
|
8 |
115 |
115 |
115 |
112 |
140 |
120 |
|
10 |
177 |
177 |
177 |
195 |
231 |
190 |
|
12 |
215 |
215 |
215 |
240 |
295 |
226 |
|
14 |
259 |
259 |
259 |
290 |
378 |
347 |
|
16 |
366 |
366 |
366 |
400 |
527 |
481 |
|
18 |
476 |
476 |
476 |
469 |
665 |
555 |
|
20 |
612 |
612 |
612 |
604 |
855 |
690 |
|
22 |
590 |
590 |
590 |
670 |
1000 |
720 |
|
24 |
876 |
876 |
876 |
866 |
1250 |
977 |
CLASS |
Nominal Pipe Size |
Slip On |
Threaded |
Socket Weld |
Lap Joint |
Blind |
Weld Neck |
900 lb |
½ |
6 |
6 |
6 |
6 |
4 |
7 |
|
¾ |
6 |
6 |
6 |
6 |
6 |
7 |
|
1 |
7.5 |
7.5 |
7.5 |
7.5 |
9 |
8.5 |
|
1¼ |
10 |
10 |
10 |
10 |
10 |
10 |
|
1½ |
14 |
14 |
14 |
14 |
14 |
14 |
|
2 |
22 |
22 |
22 |
21 |
25 |
24 |
|
2½ |
31 |
31 |
31 |
25 |
32 |
31 |
|
3 |
36 |
36 |
36 |
29 |
35 |
36 |
|
4 |
53 |
53 |
53 |
51 |
54 |
53 |
|
5 |
83 |
83 |
83 |
81 |
87 |
86 |
|
6 |
110 |
110 |
110 |
105 |
115 |
110 |
|
8 |
172 |
172 |
172 |
190 |
200 |
187 |
|
10 |
245 |
245 |
245 |
277 |
290 |
268 |
|
12 |
326 |
326 |
326 |
371 |
415 |
372 |
|
14 |
400 |
400 |
400 |
415 |
520 |
562 |
|
16 |
459 |
459 |
459 |
488 |
619 |
685 |
|
18 |
647 |
647 |
647 |
670 |
880 |
924 |
|
20 |
792 |
792 |
792 |
868 |
1107 |
1164 |
|
24 |
1480 |
1480 |
1480 |
1659 |
2099 |
2107 |
CLASS |
Nominal Pipe Size |
Slip On |
Threaded |
Socket Weld |
Lap Joint |
Blind |
Weld Neck |
1500 lb |
½ |
6 |
6 |
6 |
6 |
4 |
7 |
|
¾ |
6 |
6 |
6 |
6 |
6 |
7 |
|
1 |
8 |
8 |
8 |
8 |
9 |
9 |
|
1¼ |
10 |
10 |
10 |
10 |
10 |
10 |
|
1½ |
14 |
14 |
14 |
14 |
14 |
14 |
|
2 |
25 |
25 |
25 |
25 |
25 |
25 |
|
2½ |
36 |
36 |
36 |
35 |
35 |
36 |
|
3 |
48 |
48 |
48 |
47 |
48 |
48 |
|
4 |
73 |
73 |
73 |
75 |
73 |
73 |
|
5 |
132 |
132 |
132 |
140 |
140 |
132 |
|
6 |
165 |
165 |
165 |
170 |
160 |
165 |
|
8 |
260 |
260 |
260 |
286 |
302 |
275 |
|
10 |
436 |
436 |
436 |
485 |
510 |
455 |
|
12 |
667 |
667 |
667 |
749 |
775 |
690 |
|
14 |
940 |
940 |
940 |
890 |
975 |
940 |
|
16 |
1250 |
1250 |
1250 |
1250 |
1300 |
1250 |
|
18 |
1625 |
1625 |
1625 |
1475 |
1750 |
1625 |
|
20 |
2050 |
2050 |
2050 |
1775 |
2225 |
2050 |
|
24 |
2825 |
2825 |
2825 |
2825 |
3625 |
3325 |
CLASS |
Nominal Pipe Size |
Slip On |
Threaded |
Socket Weld |
Lap Joint |
Blind |
Weld Neck |
2500 lb |
½ |
…. |
7 |
…. |
7 |
7 |
8 |
|
¾ |
…. |
9 |
…. |
8 |
10 |
9 |
|
1 |
…. |
12 |
…. |
12 |
12 |
13 |
|
1¼ |
…. |
18 |
…. |
17 |
18 |
20 |
|
1½ |
…. |
25 |
…. |
24 |
25 |
28 |
|
2 |
…. |
38 |
…. |
37 |
39 |
42 |
|
2½ |
…. |
55 |
…. |
53 |
56 |
52 |
|
3 |
…. |
83 |
…. |
80 |
86 |
94 |
|
4 |
…. |
127 |
…. |
122 |
133 |
146 |
|
5 |
…. |
210 |
…. |
204 |
223 |
244 |
|
6 |
…. |
323 |
…. |
314 |
345 |
378 |
|
8 |
…. |
485 |
…. |
471 |
533 |
576 |
|
10 |
…. |
925 |
…. |
897 |
1025 |
1068 |
|
12 |
…. |
1300 |
…. |
1262 |
1464 |
1608 |
Industrial Flanges Available Materials and Grades