Class 900 Standard Connection Flange
Long Weld Neck Flange Heavy Barrel Flange
Equal Barrel Flange

 

Class 900 - Standard Connection Specifications
Size Flange Barrel OD Bolting Nut Stud Bolt Weights Length
Nom Bore LWN & E Bore HB OD Thk RF of OD LWN HB E # of Holes Hole Size Bolt Circle Stop Dia Relief Dia Relief Length Size RF Length RTJ Length LWN HB E Base
  B  B O  T R  D D D     C NS NR NL       Base Per  1" Base Per  1" Base Per  1" L 
 1/2 0.50 0.55 4.75 0.88 1.38 1.56 2.00 4.75 4 0.88 3.25 2.00 1.56 1.00 3/4  4 1/4 4 1/4 8 0.5 10 0.8 37 5 9
 3/4 0.75 0.74 5.12 1.00 1.69 1.81 2.25 5.12 4 0.88 3.50 2.25 1.81 1.00 3/4  4 1/2 4 1/2 10 0.6 13 1 42 5.7 9
1 1.00 0.96 5.88 1.12 2.00 2.12 2.56 5.88 4 1.00 4.00 2.56 2.12 1.12 7/8  5    5    13 0.8 17 1.3 54 7.5 9
1 1/4 1.25 1.28 6.25 1.12 2.50 2.50 2.94 6.25 4 1.00 4.38 2.94 2.50 1.12 7/8  5    5    17 1 20 1.6 61 8.3 9
1 1/2 1.50 1.50 7.00 1.25 2.88 2.75 3.25 7.00 4 1.12 4.88 3.25 2.75 1.25 1 5 1/2 5 1/2 21 1.2 26 1.9 77 10 9
2 2.00 1.94 8.50 1.50 3.62 4.12 5.06 8.50 8 1.00 6.50 5.06 4.12 1.12 7/8  5 3/4 5 3/4 42 2.9 56 4.9 115 15 9
2 1/2 2.50 2.32 9.62 1.62 4.12 4.88 5.88 9.62 8 1.12 7.50 5.88 4.88 1.25 1 6 1/4 6 1/4 56 3.9 75 6.5 144 19 9
3 3.00 2.90 9.50 1.50 5.00 5.00 6.06 9.50 8 1.00 7.50 6.06 5.00 1.12 7/8  5 3/4 5 3/4 51 3.6 71 6.3 139 18 9
4 4.00 3.83 11.50 1.75 6.19 6.25 7.44 11.50 8 1.25 9.25 7.44 6.25 1.38 1 1/8  6 3/4 6 3/4 93 5.1 133 9.1 270 26 12
5 5.00 4.81 13.75 2.00 7.31 7.50 9.00 13.75 8 1.38 11.00 9.00 7.50 1.50 1 1/4 7 1/2 7 1/2 135 7 194 13 376 37 12
6 6.00 5.76 15.00 2.19 8.50 9.25 10.69 15.00 12 1.25 12.50 10.69 9.25 1.38 1 1/8 7 1/2 7 3/4 191 11 259 18 436 42 12
8 8.00 7.62 18.50 2.50 10.62 11.75 13.31 18.50 12 1.50 15.50 13.31 11.75 1.62 1 3/8 8 3/4 8 3/4 297 16 389 27 626 62 12
10 10.00 9.56 21.50 2.75 12.75 14.50 16.31 21.50 16 1.50 18.50 16.31 14.50 1.62 1 3/8 9 1/4 9 1/4 422 25 558 39 824 81 12
12 12.00 11.38 ### 3.12 15.00 16.50 18.81 ### 20 1.50 21.00 18.81 16.50 1.62 1 3/8 10    10    518 29 715 50 984 96 12
14 14.00 14.00 ### 3.38 16.25 17.75 19.62 ### 20 1.62 22.00 19.62 17.75 1.75 1 1/2 10 3/4 11    624 26 817 42 1368 98 16
16 16.00 16.00 ### 3.50 18.50 20.00 21.69 ### 20 1.75 24.25 21.69 20.00 1.88 1 5/8 11 1/4 11 1/2 750 32 942 48 1573 114 16
18 18.00 18.00 31.00 4.00 21.00 22.25 ### 31.00 20 2.00 27.00 24.06 22.25 2.12 1 7/8 12 3/4 13 1/4 950 38 1169 57 1898 142 16
20 20.00 20.00 ### 4.25 ### 24.50 ### ### 20 2.12 29.50 26.38 24.50 2.25 2    13 3/4 14 1/4 1121 43 1378 66 2182 164 16
24 24.00 24.00 41.00 5.50 ### 29.50 31.62 41.00 20 2.62 35.50 31.62 29.50 2.75 2 1/2 17 1/4 18    1865 65 2160 94 3084 246 16
Dimensions are in inches.  Weights are in pounds.

Class 900 Standard Connection Flange PDF (for printing).