Blind Flange Specifications
Blind flanges play an indispensable role in the realm of piping systems. Their primary function is to offer a robust and dependable sealing solution at the terminal points of pipelines or for securely closing openings in piping systems and vessels.
What sets blind flanges apart from other flange varieties is their distinctive design; they lack a central bore, making them solid discs. This unique attribute is key to their functionality and application. We offer these specifications and classes of blind flanges, including:
CLASS 150# BLIND FLANGE ANSI B16.50
ITEM ID |
SIZE |
OD |
Thickness |
Weight |
ITEM ID |
SIZE |
OD |
THK |
WEIGHT |
BF.5150 |
1/2″ |
3-1/2″ |
3/8″ |
2 |
BF.75150 |
3/4″ |
3-7/8″ |
7/16″ |
2 |
BF1150 |
1″ |
4-1/4″ |
1/2″ |
2 |
BF1.25150 |
1-1/4″ |
4-5/8″ |
9/16″ |
3 |
BF1.5150 |
1-1/2″ |
5″ |
5/8″ |
4 |
BF2150 |
2″ |
6″ |
11/16″ |
5 |
BF2.5150 |
2-1/2″ |
7″ |
13/16″ |
7 |
BF3150 |
3″ |
7-1/2″ |
7/8″ |
9 |
BF3.5150 |
3-1/2″ |
8-1/2″ |
7/8″ |
13 |
BF4150 |
4″ |
9″ |
7/8″ |
17 |
BF5150 |
5″ |
10″ |
7/8″ |
20 |
BF6150 |
6″ |
11″ |
15/16″ |
27 |
BF8150 |
8″ |
13-1/2″ |
1-1/16″ |
47 |
BF10150 |
10″ |
16″ |
1-1/8″ |
70 |
BF12150 |
12″ |
19″ |
1-3/16″ |
123 |
BF14150 |
14″ |
21″ |
1-15/16″ |
140 |
BF16150 |
16″ |
23-1/2″ |
1-3/8″ |
180 |
BF18150 |
18″ |
25″ |
1-1/2″ |
220 |
BF20150 |
20″ |
27-1/2″ |
1-5/8″ |
285 |
BF22150 |
22″ |
29-1/2″ |
1-3/4″ |
355 |
BF24150 |
24″ |
32″ |
1-13/16″ |
430 |
CLASS 150# BLIND FLANGE ASME B16.47 (SERIES A)
ITEM ID |
SIZE |
OD |
Thickness |
Weight |
ITEM ID |
SIZE |
OD |
THK |
WEIGHT |
BF26150SA |
26″ |
34-1/4″ |
2-5/8″ |
702 |
BF28150SA |
28″ |
36-1/2″ |
2-3/4″ |
833 |
BF30150SA |
30″ |
38-3/4″ |
2-7/8″ |
982 |
BF32150SA |
32″ |
41-3/4″ |
3-1/8″ |
1,237 |
BF34150SA |
34″ |
43-3/4″ |
3-3/16″ |
1,384 |
BF36150SA |
36″ |
46″ |
3-1/2″ |
1,676 |
BF38150SA |
38″ |
48-3/4″ |
3-3/8″ |
1,819 |
BF40150SA |
40″ |
50-3/4″ |
3-1/2″ |
2,040 |
BF42150SA |
42″ |
53″ |
3-3/4″ |
2,381 |
BF44150SA |
44″ |
55-1/4″ |
3-15/16″ |
2,717 |
BF46150SA |
46″ |
57-1/4″ |
4″ |
2,961 |
BF48150SA |
48″ |
59-1/2″ |
4-3/16″ |
3,348 |
BF50150SA |
50″ |
61-3/4″ |
4-5/16″ |
3,716 |
BF52150SA |
52″ |
64″ |
4-1/2″ |
4,156 |
BF54150SA |
54″ |
66-1/4″ |
4-11/16″ |
4,639 |
BF56150SA |
56″ |
68-3/4″ |
4-13/16″ |
5,132 |
BF58150SA |
58″ |
71″ |
5″ |
5,675 |
BF60150SA |
60″ |
73″ |
5-1/8″ |
6,154 |
CLASS 150# BLIND FLANGE ASME B16.47 (SERIES B)
ITEM ID |
SIZE |
OD |
Thickness |
Weight |
ITEM ID |
SIZE |
OD |
Thickness |
Weight |
BF26150SB |
26″ |
30-15/16″ |
1-11/16″ |
373 |
BF28150SB |
28″ |
32-15/16″ |
1-13/16″ |
454 |
BF30150SB |
30″ |
34-15/16″ |
1-15/16″ |
543 |
BF32150SB |
32″ |
37-1/16″ |
2-1/16″ |
648 |
BF34150SB |
34″ |
39-9/16″ |
2-3/16″ |
783 |
BF36150SB |
36″ |
41-5/8″ |
2-1/4″ |
890 |
BF38150SB |
38″ |
44-1/4″ |
2-7/16″ |
1,089 |
BF40150SB |
40″ |
46-1/4″ |
2-9/16″ |
1,247 |
BF42150SB |
42″ |
48-1/4″ |
2-5/8″ |
1,393 |
BF44150SB |
44″ |
50-1/4″ |
2-3/4″ |
1,579 |
BF46150SB |
46″ |
52-13/16″ |
2-7/8″ |
1,824 |
BF48150SB |
48″ |
54-13/16″ |
3″ |
2,045 |
BF50150SB |
50″ |
56-13/16″ |
3-1/8″ |
2,284 |
BF52150SB |
52″ |
58-13/16″ |
3-1/4″ |
2,547 |
BF54150SB |
54″ |
61″ |
3-3/8″ |
2,846 |
BF56150SB |
56″ |
63″ |
3-1/2″ |
3,144 |
BF58150SB |
58″ |
65-15/16″ |
3-5/8″ |
3,560 |
BF60150SB |
60″ |
67-15/16″ |
3-3/4″ |
3,913 |
CLASS 300# BLIND FLANGE ANSI B16.50
ITEM ID |
SIZE |
OD |
Thickness |
Weight |
ITEM ID |
SIZE |
OD |
THK |
WEIGHT |
BF.5300 |
1/2″ |
3-3/4″ |
1/2″ |
2 |
BF.75300 |
3/4″ |
4-5/8″ |
9/16″ |
3 |
BF1300 |
1″ |
4-7/8″ |
5/8″ |
4 |
BF1.25300 |
1-1/4″ |
5-1/4″ |
11/16″ |
6 |
BF1.5300 |
1-1/2″ |
6-1/8″ |
3/4″ |
7 |
BF2300 |
2″ |
6-1/2″ |
13/16″ |
8 |
BF2.5300 |
2-1/2″ |
7-1/2″ |
15/16″ |
12 |
BF3300 |
3″ |
8-1/4″ |
1-1/16″ |
16 |
BF3.5300 |
3-1/2″ |
9″ |
1-1/8″ |
21 |
BF4300 |
4″ |
10″ |
1-3/16″ |
28 |
BF5300 |
5″ |
11″ |
1-5/16″ |
37 |
BF6300 |
6″ |
12-1/2″ |
1-3/8″ |
50 |
BF8300 |
8″ |
15″ |
1-9/16″ |
81 |
BF10300 |
10″ |
17-1/2″ |
1-13/16″ |
124 |
BF12300 |
12″ |
20-1/2″ |
1-15/16″ |
185 |
BF14300 |
14″ |
23″ |
2-1/16″ |
250 |
BF16300 |
16″ |
25-1/2″ |
2-3/16″ |
315 |
BF18300 |
18″ |
28″ |
2-5/16″ |
414 |
BF20300 |
20″ |
30-1/2″ |
2-7/16″ |
515 |
BF22300 |
22″ |
33″ |
2-9/16″ |
640 |
BF24300 |
24″ |
36″ |
2-11/16″ |
800 |
CLASS 300# BLIND FLANGE ASME B16.47 (SERIES A)
ITEM ID |
SIZE |
OD |
Thickness |
Weight |
ITEM ID |
SIZE |
OD |
THK |
WEIGHT |
BF26300SA |
26″ |
38-1/4″ |
3-1/4″ |
1,078 |
BF28300SA |
28″ |
40-3/4″ |
3-1/2″ |
1,315 |
BF30300SA |
30″ |
43″ |
3-11/16″ |
1,543 |
BF32300SA |
32″ |
45-1/4″ |
3-7/8″ |
1,795 |
BF34300SA |
34″ |
47-1/2″ |
4-1/16″ |
2,068 |
BF36300SA |
36″ |
50″ |
4-5/16″ |
2,436 |
BF38300SA |
38″ |
46″ |
4-3/16″ |
2,001 |
BF40300SA |
40″ |
48-3/4″ |
4-7/16″ |
2,380 |
BF42300SA |
42″ |
50-3/4″ |
4-5/8″ |
2,688 |
BF44300SA |
44″ |
53-1/4″ |
4-13/16″ |
3,079 |
BF46300SA |
46″ |
55-3/4″ |
5″ |
3,499 |
BF48300SA |
48″ |
57-3/4″ |
5-3/16″ |
3,896 |
BF50300SA |
50″ |
60-1/4″ |
5-7/16″ |
4,442 |
BF52300SA |
52″ |
62-1/4″ |
5-5/8″ |
4,906 |
BF54300SA |
54″ |
65-1/4″ |
5-15/16″ |
5,684 |
BF56300SA |
56″ |
67-1/4″ |
6″ |
6,098 |
BF58300SA |
58″ |
69-1/4″ |
6-3/16″ |
6,669 |
BF60300SA |
60″ |
71-1/4″ |
6-3/8″ |
7,274 |
CLASS 300# BLIND FLANGE ASME B16.47 (SERIES B)
ITEM ID |
SIZE |
OD |
Thickness |
Weight |
ITEM ID |
SIZE |
OD |
Thickness |
Weight |
BF26300SB |
26″ |
34-1/8″ |
3-7/16″ |
907 |
BF28300SB |
28″ |
36-1/4″ |
3-7/16″ |
1,023 |
BF30300SB |
30″ |
39″ |
3-5/8″ |
1,249 |
BF32300SB |
32″ |
41-1/2″ |
4″ |
1,556 |
BF34300SB |
34″ |
43-5/8″ |
4″ |
1,719 |
BF36300SB |
36″ |
46-1/8″ |
4″ |
1,921 |
BF38300SB |
38″ |
48-1/8″ |
4-5/16″ |
2,257 |
BF40300SB |
40″ |
50-1/8″ |
4-1/2″ |
2,549 |
BF42300SB |
42″ |
52-1/2″ |
4-5/8″ |
2,876 |
BF44300SB |
44″ |
54-1/2″ |
4-15/16″ |
3,304 |
BF46300SB |
46″ |
57-1/2″ |
5-1/16″ |
3,766 |
BF48300SB |
48″ |
59-1/2″ |
5-1/4″ |
4,183 |
BF50300SB |
50″ |
61-1/2″ |
5-7/16″ |
4,629 |
BF52300SB |
52″ |
63-1/2″ |
5-5/8″ |
5,096 |
BF54300SB |
54″ |
65-7/8″ |
5-13/16″ |
5,678 |
BF56300SB |
56″ |
69-1/2″ |
6-1/8″ |
6,642 |
BF58300SB |
58″ |
71-15/16″ |
6-5/16″ |
7,347 |
BF60300SB |
60″ |
73-15/16″ |
6-1/2″ |
7,980 |
CLASS 600# BLIND FLANGE ANSI B16.50
ITEM ID |
SIZE |
OD |
Thickness |
Weight |
ITEM ID |
SIZE |
OD |
THK |
WEIGHT |
BF.5600 |
1/2″ |
3-3/4″ |
9/16″ |
3 |
BF.75600 |
3/4″ |
4-5/8″ |
5/8″ |
4 |
BF1600 |
1″ |
4-7/8″ |
11/16″ |
4 |
BF1.25600 |
1-1/4″ |
5-1/4″ |
13/16″ |
6 |
BF1.5600 |
1-1/2″ |
6-1/8″ |
7/8″ |
8 |
BF2600 |
2″ |
6-1/2″ |
1″ |
10 |
BF2.5600 |
2-1/2″ |
7-1/2″ |
1-1/8″ |
15 |
BF3600 |
3″ |
8-1/4″ |
8-1/4″ |
20 |
BF3.5600 |
3-1/2″ |
9″ |
1-3/8″ |
29 |
BF4600 |
4″ |
10-3/4″ |
1-1/2″ |
41 |
BF5600 |
5″ |
13″ |
1-3/4″ |
68 |
BF6600 |
6″ |
14″ |
1-7/8″ |
86 |
BF8600 |
8″ |
16-1/2″ |
2-3/16″ |
140 |
BF10600 |
10″ |
20″ |
2-1/2″ |
231 |
BF12600 |
12″ |
22″ |
2-5/8″ |
295 |
BF14600 |
14″ |
23-3/4″ |
2-3/4″ |
378 |
BF16600 |
16″ |
27″ |
3″ |
527 |
BF18600 |
18″ |
29-1/4″ |
3-1/4″ |
665 |
BF20600 |
20″ |
32″ |
3-1/2″ |
855 |
BF22600 |
22″ |
34-1/4 |
3-3/4″ |
1000 |
BF24600 |
24″ |
37″ |
4″ |
1250 |
CLASS 600# BLIND FLANGE ASME B16.47 (SERIES A)
ITEM ID |
SIZE |
OD |
Thickness |
Weight |
ITEM ID |
SIZE |
OD |
THK |
WEIGHT |
BF26600SA |
26″ |
40″ |
4-15/16″ |
1,759 |
BF28600SA |
28″ |
42-1/4″ |
5-3/16″ |
2,061 |
BF30600SA |
30″ |
44-1/2″ |
5-1/2″ |
2,423 |
BF32600SA |
32″ |
47″ |
5-13/16″ |
2,856 |
BF34600SA |
34″ |
49″ |
6-1/16″ |
3,237 |
BF36600SA |
36″ |
51-3/4″ |
6-3/8″ |
3,802 |
BF38600SA |
38″ |
50″ |
6-1/8″ |
3,404 |
BF40600SA |
40″ |
52″ |
6-3/8″ |
3,838 |
BF42600SA |
42″ |
55-1/4″ |
6-3/4″ |
4,585 |
BF44600SA |
44″ |
57-1/4″ |
7″ |
5,105 |
BF46600SA |
46″ |
59-1/2″ |
7-5/16″ |
5,758 |
BF48600SA |
48″ |
62-3/4″ |
7-11/16″ |
6,737 |
BF50600SA |
50″ |
65-3/4″ |
8″ |
7,695 |
BF52600SA |
52″ |
67-3/4″ |
8-1/4″ |
8,426 |
BF54600SA |
54″ |
70″ |
8-9/16″ |
9,333 |
BF56600SA |
56″ |
73″ |
8-7/8″ |
10,529 |
BF58600SA |
58″ |
75″ |
9-1/8″ |
11,414 |
BF60600SA |
60″ |
78-1/2″ |
9-9/16″ |
13,108 |
CLASS 600# BLIND FLANGE ASME B16.47 (SERIES B)
ITEM ID |
SIZE |
OD |
Thickness |
Weight |
ITEM ID |
SIZE |
OD |
Thickness |
Weight |
BF26600SB |
26″ |
35″ |
4-3/8″ |
1,194 |
BF28600SB |
28″ |
37-1/2″ |
4-9/16″ |
1,427 |
BF30600SB |
30″ |
40-1/4″ |
5″ |
1,802 |
BF32600SB |
32″ |
42-3/4″ |
5-5/16″ |
2,159 |
BF34600SB |
34″ |
45-3/4″ |
5-11/16″ |
2,645 |
BF36600SB |
36″ |
47-3/4″ |
5-15/16″ |
3,013 |
BF38600SB |
38″ |
50″ |
6-1/8″ |
3,404 |
BF40600SB |
40″ |
52″ |
6-3/8″ |
3,838 |
BF42600SB |
42″ |
55-1/4″ |
6-3/4″ |
4,585 |
BF44600SB |
44″ |
57-1/4″ |
7″ |
5,105 |
BF46600SB |
46″ |
59-1/2″ |
7-5/16″ |
5,758 |
BF48600SB |
48″ |
62-3/4″ |
7-11/16″ |
6,737 |
BF50600SB |
50″ |
65-3/4″ |
8″ |
7,695 |
BF52600SB |
52″ |
67-3/4″ |
8-1/4″ |
8,426 |
BF54600SB |
54″ |
70″ |
8-9/16″ |
9,333 |
BF56600SB |
56″ |
73″ |
8-7/8″ |
10,529 |
BF58600SB |
58″ |
75″ |
9-1/8″ |
11,414 |
BF60600SB |
60″ |
78-1/2″ |
9-9/16″ |
13,108 |
CLASS 900# BLIND FLANGE ANSI B16.50
ITEM ID |
SIZE |
OD |
Thickness |
Weight |
ITEM ID |
SIZE |
OD |
THK |
WEIGHT |
BF.5900 |
1/2″ |
4-3/4″ |
7/8″ |
4 |
BF.75900 |
3/4″ |
5-1/8″ |
1″ |
6 |
BF1900 |
1″ |
5-7/8″ |
1-1/8″ |
9 |
BF1.25900 |
1-1/4″ |
6-1/4″ |
1-1/8″ |
10 |
BF1.5900 |
1-1/2″ |
7″ |
1-1/4″ |
14 |
BF2900 |
2″ |
8-1/2″ |
1-1/2″ |
25 |
BF2.5900 |
2-1/2″ |
9-5/8″ |
1-5/8″ |
32 |
BF3900 |
3″ |
9-1/2″ |
1-1/2″ |
35 |
|
3-1/2″ |
|
|
|
BF4900 |
4″ |
11-1/2″ |
1-3/4″ |
54 |
BF5900 |
5″ |
13-3/4″ |
2″ |
87 |
BF6900 |
6″ |
15″ |
2-3/16″ |
115 |
BF8900 |
8″ |
18-1/2″ |
2-1/2″ |
200 |
BF10900 |
10″ |
21-1/2″ |
2-3/4″ |
290 |
BF12900 |
12″ |
24″ |
3-1/8″ |
415 |
BF14900 |
14″ |
25-1/4″ |
3-3/8″ |
520 |
BF16900 |
16″ |
27-3/4″ |
2-1/2″ |
619 |
BF18900 |
18″ |
31″ |
4″ |
880 |
BF20900 |
20″ |
33-3/4″ |
4-1/4″ |
1107 |
|
22″ |
|
|
|
BF24900 |
24″ |
41″ |
5-1/2″ |
2099 |
CLASS 900# BLIND FLANGE ASME B16.47 (SERIES A)
ITEM ID |
SIZE |
OD |
Thickness |
Weight |
ITEM ID |
SIZE |
OD |
THK |
WEIGHT |
BF26900SA |
26″ |
42-3/4″ |
6-5/16″ |
2,566 |
BF28900SA |
28″ |
46″ |
6-3/4″ |
3,178 |
BF30900SA |
30″ |
48-1/2″ |
7-13/16″ |
3,758 |
BF32900SA |
32″ |
51-3/4″ |
7-5/8″ |
4,541 |
BF34900SA |
34″ |
55″ |
8-1/16″ |
5,425 |
BF36900SA |
36″ |
57-1/2″ |
8-7/16″ |
6,209 |
BF38900SA |
38″ |
57-1/2″ |
8-1/2″ |
6,253 |
BF40900SA |
40″ |
59-1/2″ |
8-13/16″ |
6,940 |
BF42900SA |
42″ |
61-1/2″ |
9-1/8″ |
7,675 |
BF44900SA |
44″ |
64-7/8″ |
9-9/16″ |
8,954 |
BF46900SA |
46″ |
68-1/4″ |
10-1/16″ |
10,426 |
BF48900SA |
48″ |
70-1/4″ |
10-3/8″ |
11,398 |
CLASS 900# BLIND FLANGE ASME B16.47 (SERIES B)
ITEM ID |
SIZE |
OD |
Thickness |
Weight |
ITEM ID |
SIZE |
OD |
Thickness |
Weight |
BF26900SB |
26″ |
40-1/4″ |
6-1/16″ |
2,184 |
BF28900SB |
28″ |
43-1/2″ |
6-9/16″ |
2,762 |
BF30900SB |
30″ |
46-1/2″ |
6-15/16″ |
3,334 |
BF32900SB |
32″ |
48-3/14″ |
7-5/16″ |
3,865 |
BF34900SB |
34″ |
51-3/4″ |
7-11/16″ |
4,576 |
BF36900SB |
36″ |
53″ |
7-15/16″ |
4,963 |
BF38900SB |
38″ |
57-1/2″ |
8-1/2″ |
6,253 |
BF40900SB |
40″ |
59-1/2″ |
8-13/16″ |
6,940 |
BF42900SB |
42″ |
61-1/2″ |
9-1/8″ |
7,675 |
BF44900SB |
44″ |
64-7/8″ |
9-9/16″ |
8,954 |
BF46900SB |
46″ |
68-1/4″ |
10-1/16″ |
10,426 |
BF48900SB |
48″ |
70-1/4″ |
10-3/8″ |
11,398 |
CLASS 1500# BLIND FLANGE ANSI B16.50
ITEM ID |
SIZE |
OD |
Thickness |
Weight |
ITEM ID |
SIZE |
OD |
THK |
WEIGHT |
BF.51500 |
1/2″ |
4-3/4″ |
7/8″ |
4 |
BF.751500 |
3/4″ |
5-1/8″ |
1″ |
6 |
BF11500 |
1″ |
5-7/8″ |
1-1/8″ |
9 |
BF1.251500 |
1-1/4″ |
6-1/4″ |
1-1/8″ |
10 |
BF1.51500 |
1-1/2″ |
7″ |
1-1/4″ |
14 |
BF21500 |
2″ |
8-1/2″ |
1-1/2″ |
25 |
BF2.51500 |
2-1/2″ |
9-5/8″ |
1-5/8″ |
35 |
BF31500 |
3″ |
10-1/2″ |
1-7/8″ |
48 |
|
3-1/2″ |
|
|
|
BF41500 |
4″ |
12-1/4″ |
2-1/8″ |
73 |
BF51500 |
5″ |
14-3/4″ |
2-7/8″ |
140 |
BF61500 |
6″ |
15-1/2″ |
3-1/4″ |
160 |
BF81500 |
8″ |
19″ |
3-5/8″ |
302 |
BF101500 |
10″ |
23″ |
4-1/4″ |
510 |
BF121500 |
12″ |
26-1/2″ |
4-7/8″ |
775 |
BF141500 |
14″ |
29-1/2″ |
5-1/4″ |
975 |
BF161500 |
16″ |
32-1/2″ |
5-3/4″ |
1300 |
BF181500 |
18″ |
36″ |
6-3/8″ |
1750 |
BF201500 |
20″ |
38-3/4″ |
7″ |
2225 |
|
22″ |
|
|
|
BF241500 |
24″ |
46″ |
8″ |
3625 |
CLASS 2500# BLIND FLANGE ANSI B16.50
ITEM ID |
SIZE |
OD |
Thickness |
Weight |
ITEM ID |
SIZE |
OD |
THK |
WEIGHT |
BF.52500 |
1/2″ |
5-1/4″ |
1-3/16″ |
7 |
BF.752500 |
3/4″ |
5-1/2″ |
1-1/4″ |
10 |
BF12500 |
1″ |
6-1/4″ |
1-3/8″ |
12 |
BF1.252500 |
1-1/4″ |
7-1/4″ |
1-1/2″ |
18 |
BF1.52500 |
1-1/2″ |
8″ |
1-3/4″ |
25 |
BF22500 |
2″ |
9-1/4″ |
2″ |
39 |
BF2.52500 |
2-1/2″ |
10-1/2″ |
2-1/4″ |
56 |
BF32500 |
3″ |
12″ |
2-5/8″ |
86 |
|
3-1/2″ |
|
|
|
BF42500 |
4″ |
14″ |
3″ |
133 |
BF52500 |
5″ |
16-1/2″ |
3-5/8″ |
223 |
BF62500 |
6″ |
19″ |
4-1/4″ |
345 |
BF82500 |
8″ |
21-3/4″ |
5″ |
533 |
BF102500 |
10″ |
26-1/2″ |
6-1/2″ |
1025 |
BF122500 |
12″ |
30″ |
7-1/4″ |
1464 |