Class 75SO Flanges
Class 75 Slip On Flange Class 75 Blind Flange
Slip On
Blind

 

Industry Standard Class 75 Slip-On & Blind
Nom Size   Thickness   Drilling Weight
OD Slip On Blind OD of RF Dia at Base Borea LTH Bolt Circle Bolt Lengthb Hole Diac #  of Holes Slip On Blind
O T  C R X B L             
26 33.00 1.25 1.25 30.00 28.50 26.25 2.25 31.00 5.00 1.00 32 120 290
28 35.00 1.25 1.38 32.00 30.50 28.25 2.25 33.00 5.25 1.00 36 140 360
30 37.00 1.25 1.38 34.00 32.50 30.25 2.25 35.00 5.25 1.00 36 150 405
32 39.50 1.25 1.50 36.25 34.63 32.25 2.50 37.38 5.50 1.13 40 170 500
34 41.50 1.25 1.63 38.25 36.63 34.25 2.50 39.38 5.75 1.13 40 180 600
36 43.50 1.25 1.63 40.25 38.63 36.25 2.50 41.38 5.75 1.13 44 190 660
42 50.00 1.25 1.88 46.50 44.75 42.25 2.75 47.75 6.25 1.25 48 235 1000
48 56.00 1.25 2.13 52.50 50.75 48.25 2.88 53.75 6.50 1.25 56 270 1450
54 62.50 1.38 2.38 59.00 57.25 54.25 3.13 60.25 6.75 1.25 68 335 2000
60 68.50 1.63 2.63 65.00 63.25 60.25 3.63 66.25 7.25 1.25 72 450 2675
66 75.50 1.75 2.88 71.63 69.50 66.25 4.00 73.00 8.00 1.38 72 590 3550
72 81.50 2.00 3.13 77.63 75.50 72.25 4.50 79.00 8.50 1.38 80 730 4500
Dimensions are in inches.  Weights are in pounds.
Note:  Larger sizes as well as intermediate sizes can be furnished.  When ordering Industry Standard Class 75 blinds specifiy if they are to be used with Weld Neck or Slip On flanges as the blinds differ between the two.                                                                                                                                                                                                                           
(a) Bores listed are most common.  They can be specified by customer were applicable.
(b) Bolt lengths are calculated based on bolting one slip-on to one blind.  Any other bolting combination 
      will cause variance in bolt length.     
(c)  Bolt hole diameter 1/8in. larger than bolt diameter.

Class 75 SO Flange PDF (for printing).