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ANSI B16.47 Ser. B Class 75 Flanges

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Series B 75 Weld Neck Flange Series B 75 Blind Flange  
     

Thickness Drilling Weight
Nom Size OD Weld Neck Blind OD of RF Dia at Base Bore LTH Dia Bevel Bolt Circle Bolt Length Hole Dia  # of Holes Weld Neck Blind
O C C R X B Y A (1) (2)
26 30 1.25 1.25 27.75 26.62 flanges, flange, industrial flanges, industrial flange, industrial pipe flanges, industrial fittings, industrial pipe, industrial carbon steel, industrial blind, industrial blinds, industrial, industrial waterworks, industrial stainless steel, industrial steel, industrial weld, industrial forgings, industrial orifice, industrial slip, industrial steel flange, industrial steel flanges, industrial titanium flange, industrial titanium flanges 2.25 26.06 28.5 4.5 0.75 36 80 255
28 32 1.25 1.25 29.75 28.62 2.38 28.06 30.5 4.5 0.75 40 85 290
30 34 1.25 1.25 31.75 30.62 2.5 30.06 32.5 4.5 0.75 44 90 330
32 36 1.32 1.38 33.75 32.62 2.69 32.06 34.5 4.75 0.75 48 105 390
34 38 1.32 1.44 35.75 34.62 2.82 34.06 36.5 4.75 0.75 52 110 430
36 40.69 1.38 1.61 38 36.81 3.32 36.06 39.06 5.25 0.88 40 145 518
38 42.69 1.44 1.69 40 38.81 3.44 38.06 41.06 5.5 0.88 40 160 595
40 44.69 1.44 1.69 42 40.81 3.57 40.06 43.06 5.5 0.88 44 170 760
42 46.69 1.5 1.82 44 42.81 3.69 42.06 45.06 5.5 0.88 48 185 895
44 49.25 1.63 1.88 46.25 44.88 4.07 44.06 47.38 6 1 36 230 1065
46 51.25 1.69 1.94 48.25 46.88 4.19 46.06 49.38 6.25 1 40 245 1185
48 53.25 1.75 2.07 50.25 48.88 4.32 48.06 51.38 6.5 1 44 270 1315
50 55.25 1.82 2.13 52.25 50.94 4.5 50.06 53.38 6.5 1 44 290 1505
52 57.38 1.82 2.19 54.25 52.94 4.69 52.06 55.5 6.75 1 48 310 1665
54 59.38 1.88 2.32 56.25 55 4.88 54.06 57.5 6.75 1 48 340 1840
56 62 1.94 2.38 58.5 57.12 5.25 56.06 59.88 7.25 1.12 40 400 2110
58 64 2 2.44 60.5 59.12 5.38 58.06 61.88 7.25 1.12 44 430 2300
60 66 2.13 2.57 62.5 61.12 5.63 60.06 63.88 7.75 1.12 44 475 2500

Dimensions are in inches. Weights are in pounds.

(1)- Bolt lenghts are calculated based on bolting one WN to one Blind. 
(2)- Bolt diameter should be 1/8" less than the bolt hole diameter
Note:

Larger sizes as well as intermediate sizes can be furnished.
ANSI B16.47 Series B Class 75 Flange PDF (for printing).