Blind Flange Dimensions Chart 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 CLASS #300 CLASS #600 CLASS #900 CLASS #1500 CLASS #2500
CLASS 150# BLIND FLANGE ANSI B16.50 ITEM SIZE OD Thickness 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 SIZE OD Thickness 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 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 SIZE OD Thickness 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 SIZE OD Thickness 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 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 SIZE OD Thickness 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 SIZE OD Thickness 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 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 SIZE OD Thickness 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 SIZE OD Thickness 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 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 SIZE OD Thickness 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 SIZE OD Thickness 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
