Welding Neck Orifice Class 600 Flanges
Weld Neck Orifice Flange
Welding Neck Orifice Class 600
  Drilling     Ring Type Joint
  Nom  Size OD Thickness OD of RF Dia at base Dia Bevel LTH Dia of Pressure Connection Bolt Circle Hole Dia # of holes Bolt Dia Grove # Pitch Dia Groove Depth Groove width Rad at Bottom Spec Oval RH
O C R X A Y TT   RF RJ       P E F r max W
in 1 4.88 1.50 2.00 2.12 1.32 3.25  1/4 3.50 0.69 0.75 4  5/8 R16 2.000 0.250 0.344 0.03 1.00
mm   124.0 38.1 50.8 53.8 33.5 82.6 6.4 88.9 17.50 19.1   15.9   50.800 6.350 8.738 0.8 25.4
in ### 6.12 1.50 2.88 2.75 1.90 3.38  1/4 4.50 0.81 0.88 4  3/4 R20 2.688 0.250 0.344 0.03 1.00
mm   155.4 38.1 73.2 69.9 48.3 85.9 6.4 114.3 20.60 22.4   19.1   68.275 6.350 8.738 0.8 25.4
in 2 6.50 1.50 3.62 3.31 2.38 3.38  1/4 5.00 0.69 0.75 8  5/8 R23 3.250 0.312 0.469 0.03 1.06
mm   165.1 38.1 91.9 84.1 60.5 85.9 6.4 127.00 17.50 19.1   15.9   82.550 7.925 11.913 0.8 26.9
in ### 7.50 1.50 4.12 3.94 2.88 3.50  1/4 5.88 0.81 0.88 8  3/4 R26 4.000 0.312 0.469 0.03 1.06
mm   190.5 38.1 104.6 100.1 73.2 88.9 6.4 149.4 20.60 22.4   19.1   101.600 7.925 11.913 0.8 26.9
in 3 8.25 1.50 5.00 4.62 3.50 3.50  3/8 6.62 0.81 0.88 8  3/4 R31 4.875 0.312 0.469 0.03 1.06
mm   209.6 38.1 127.0 117.3 88.9 88.9 9.5 168.2 20.60 22.4   19.1   #### 7.925 11.913 0.8 26.9
in 4 10.75 1.50 6.19 6.00 4.50 4.00  1/2 8.50 1.00 1.00 8  7/8 R37 5.875 0.312 0.469 0.03 1.06
mm   273.1 38.1 157.2 152.4 114.3 101.6 12.7 215.9 25.40 25.4   22.2   #### 7.925 11.913 0.8 26.9
in 6 14.00 1.88 8.50 8.75 6.63 4.62  1/2 11.50 1.12 1.12 12 1    R45 8.312 0.312 0.469 0.03 1.06
mm   355.6 47.8 215.9 222.3 168.4 117 12.7 292.1 28.40 28.4   25.4   211.125 7.925 11.913 0.8 26.9
in 8 16.50 2.19 10.62 10.75 8.63 5.25  1/2 13.75 1.25 1.25 12 1 1/8 R49 10.625 0.312 0.469 0.03 1.06
mm   419.1 55.6 269.7 273.1 219.2 133 12.7 349.3 31.80 31.8   28.6   #### 7.925 11.913 0.8 26.9
in 10 20.00 2.50 12.75 13.50 10.75 6.00  1/2 17.00 1.38 1.38 16 1 1/4 R53 12.750 0.312 0.469 0.03 1.06
mm   508.0 63.5 323.9 342.9 273.1 152 12.7 431.8 35.10 35.1   31.8   #### 7.925 11.913 0.8 26.9
in 12 22.00 2.62 15.00 15.75 12.75 6.12  1/2 19.25 1.38 1.38 20 1 1/4 R57 15.000 0.312 0.469 0.03 1.06
mm   558.8 66.5 381.0 400.1 323.9 155.4 12.7 489 35.10 35.1   31.8   #### 7.925 11.913 0.8 26.9
in 14 23.75 2.75 16.25 17.00 14.00 6.50  1/2 20.75 1.50 1.50 20 1 3/8 R61 16.500 0.312 0.469 0.03 1.06
mm   603.3 69.9 412.8 431.8 355.6 165 12.7 527.1 38.10 38.1   35.1   419.100 7.925 11.913 0.8 26.9
in 16 27.00 3.00 18.50 19.50 16.00 7.00  1/2 23.75 1.60 1.60 20 1 1/2 R65 18.500 0.312 0.469 0.03 1.19
mm   685.8 76.2 469.9 495.3 406.4 178 12.7 603.3 41.10 41.1   38.1   #### 7.925 11.913 0.8 30.2
in 18 29.25 3.25 21.00 21.50 18.00 7.25  1/2 25.75 1.75 1.75 20 1 5/8 R69 21.000 0.312 0.469 0.03 1.19
mm   743.0 82.6 533.4 546.1 457.2 184 12.7 654.1 44.50 44.5   41.3   #### 7.925 11.913 0.8 30.2
in 20 32.00 3.50 23.00 24.00 20.00 7.50  1/2 28.50 1.75 1.75 24 1 5/8 R73 23.000 0.375 0.531 0.06 1.25
mm   812.8 88.9 584.2 609.6 508.0 191 12.7 723.9 44.50 44.5   41.3   #### 9.525 13.487 1.5 31.8
in 24 37.00 4.00 27.25 28.25 24.00 8.00  1/2 33.00 2.00 2.00 24 1 7/8            
mm   939.8 101.6 692.2 717.6 609.6 203 12.7 838.2 50.80 50.8   47.6            
1.  Bore diameter to be specified by purchaser.
2.  Other NPT and SW connections available upon request.

Welding Neck Orifice Class 600 Flange PDF (for printing).