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Threaded Orifice Class 300 Flanges

Threaded Orifice Class 300

(Click any image above to enlarge it and lock it in place, then scroll to the bottom table for dimensions)
Drilling
Nom Size OD Thickness OD of RF Dia at Base LTH OD of Counter Bore Counter Bore Depth         (from face) Dia of    Pressure Connection Bolt Circle Hole Dia # of Holes Bolt Dia
O C R X Y Qb(2) Qf(3) F G TT
in. 1 4.88 1.5 2 2.12 1.88 1.41 1.3 1.44 0.75  1/4 3.5 0.69 4     5/8
mm. 124 38.1 50.8 53.8 47.8 35.8 33 36.6 19.1 6.4 88.9 17.5 15.9
in. 1 1/2 6.12 1.5 2.88 2.75 1.88 1.99 1.89 1.47 0.72  1/4 4.5 0.81 4     3/4
mm. 155.4 38.1 73.2 69.9 47.8 50.5 48 37.3 18.3 6.4 114.3 20.6 19.1
in. 2 6.5 1.5 3.62 3.31 1.94 2.5 2.36 1.5 0.69  1/4 5 0.69 8     5/8
mm. 165.1 38.1 91.9 84.1 49.3 63.5 59.9 38.1 17.5 6.4 127 17.5 15.9
in. 2 1/2 7.5 1.5 4.12 3.94 2 3 2.84 1.75 0.56  1/4 5.88 0.81 8     3/4
mm. 190.5 38.1 104.6 100.1 50.8 76.2 72.1 44.5 14.2 6.4 149.4 20.6 19.1
in. 3 8.25 1.5 5 4.62 2.06 3.63 3.46 1.81 0.56  3/8 6.62 0.81 8     3/4
mm. 209.6 38.1 127 117.3 52.3 92.2 87.9 46 14.2 9.5 168.1 20.6 19.1
in. 4 10 1.5 6.19 5.75 2.12 4.63 4.45 1.88 0.56  1/2 7.88 0.81 8     3/4
mm. 254 38.1 157.2 146.1 53.8 117.6 113 47.8 14.2 12.7 200.2 20.6 19.1
in. 6 12.5 1.5 8.5 8.12 2.12 6.75 6.57 1.88 0.31  1/2 10.62 0.88 12     3/4
mm. 317.5 38.1 215.9 206.2 53.8 171.5 166.9 47.8 7.9 12.7 269.7 22.4 19.1
in. 8 15 1.62 10.62 10.25 2.44 8.75 8.55 2.19 0.44  1/2 13 1 12     7/8
mm. 381 41.1 269.7 260.4 62 222.3 217.2 55.6 11.2 12.7 330.2 25.4 22.2

(1) Other NPT and SW connections available upon request.
(2) Qb counterbore back.
(3) Qf counterbore face.
Welding Neck Orifice Class 300 Threaded Flange PDF (for printing).