Flange Weight Calculator
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Flange Weight Calculator is your go-to tool for accurately determining the weight of flanges. Designed to simplify your calculations, this handy calculator takes into account factors like size, pressure rating, and material to provide you with precise weight measurements. Whether you’re working on a large-scale project or need to assess shipping requirements, the MS Flange Weight Calculator ensures you have the information you need at your fingertips. Say goodbye to guesswork and hello to efficient planning and budgeting. Experience the ease and accuracy of the Blind Flange Weight Calculator today and take control of your flange weight calculations.
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ANSI B16.5 Flange Weight Chart – Blind Flange Chart online
Weight Chart of ANSI B16.5 -½ “-24” Forged Flanges
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 |
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