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Welding Neck Orifice Class 900 Flanges

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  Welding Neck Orifice Class 900  
     

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 P E F r max W
in 3 9.5 1.5 5 5 3.5 4  3/8 7.5 1 8  7/8 R31 4.875 0.312 0.469 0.03 1.06
mm 241.3 38.1 127 127 88.9 101.6 9.5 190.5 25.4 22.2 123.825 7.925 11.913 0.8 26.9
in 4    11.5 1.75 6.19 6.25 4.5 4.5  1/2 9.25 1.25 8 1 1/8 R37 5.875 0.312 0.469 0.03 1.06
mm 292.1 44.5 157.2 158.8 114.3 114.3 12.7 235 31.8 28.6 149.225 7.925 11.913 0.8 26.9
in 6 15 2.19 8.5 9.25 6.63 5.5  1/2 12.5 1.25 12 1 1/8 R45 8.312 0.312 0.469 0.03 1.06
mm 381 55.6 215.9 235 168.4 139.7 12.7 317.5 31.8 28.6 211.125 7.925 11.913 0.8 26.9
in 8    18.5 2.5 10.62 11.75 8.63 6.38  1/2 15.5 1.5 12 1 3/8 R49 10.625 0.312 0.469 0.03 1.06
mm 469.9 63.5 269.7 298.5 219.2 162.1 12.7 393.7 38.1 34.9 269.875 7.925 11.913 0.8 26.9
in 10 21.5 2.75 12.75 14.5 10.75 7.25  1/2 18.5 1.5 16 1 3/8 R53 12.75 0.312 0.469 0.03 1.06
mm 546.1 69.9 323.9 368.3 273.1 184.2 12.7 469.9 38.1 34.9 323.850 7.925 11.913 0.8 26.9
in 12 24 3.12 15 16.5 12.75 7.88  1/2 21 1.5 20 1 3/8 R57 15 0.312 0.469 0.03 1.06
mm 609.6 79.2 381 419.1 323.9 200.2 12.7 533.4 38.1 34.9 381.000 7.925 11.913 0.8 26.9
in 14 25.25 3.38 16.25 17.75 14 8.38  1/2 22 1.62 20 1 1/2
mm 641.4 85.9 412.8 450.9 355.6 212.9 12.7 558.8 41.1 38.1
in 16 27.75 3.5 18.5 20 16 8.5  1/2 24.3 1.75 20 1 5/8
mm 704.9 88.9 469.9 508 406.4 215.9 12.7 616 44.5 41.3
in 18 31 4 21 22.25 18 9  1/2 27 2 20 1 7/8
mm 787.4 101.6 533.4 565.2 457.2 228.6 12.7 685.8 50.8 47.6
in 20 33.75 4.25 23 24.5 20 9.75  1/2 29.5 2.12 20 2   
mm 857.3 108 584.2 622.3 508 247.7 12.7 749.3 53.8 50.8
in 24 41 5.5 27.25 29.5 24 11.5  1/2 35.5 2.62 20 2 1/2
mm 1041.4 139.7 692.2 749.3 609.6 292.1 12.7 901.7 66.5 63.5
(1) Bore diameter to be specified by purchaser
(2) Other NPT and SW connections available upon request. 

Welding Neck Orifice Class 900 Flange PDF (for printing).