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Class 300WN Flanges

Welding Neck Orifice Class 300 FlangeS

(Click any image above to enlarge it and lock it in place, then scroll to the bottom table for dimensions)
Drilling
Nom  SizeODThicknessOD of RFDia at BaseDia BevelLTHDia of Pressure ConnectionBolt CircleHole Dia# of HolesBolt Dia
OCRXAYTT
in14.881.522.121.323.25 1/43.50.694 5/8
mm12438.150.853.833.582.66.488.917.515.9
in1 1/26.121.52.882.751.93.38 1/44.50.814 3/4
mm155.438.173.269.948.385.96.4114.320.619.1
in26.51.53.623.312.383.38 1/450.698 5/8
mm165.138.191.984.160.585.96.412717.515.9
in2 1/27.51.54.123.942.883.5 1/45.880.818 3/4
mm190.538.1104.6100.173.288.96.4149.420.619.1
in38.251.554.623.53.5 3/86.620.818 3/4
mm209.638.1127117.388.988.99.5168.120.619.1
in4101.56.195.754.53.62 1/27.880.818 3/4
mm25438.1157.2146.1114.391.912.7200.220.619.1
in612.51.58.58.126.633.94 1/210.620.8812 3/4
mm317.538.1215.9206.2168.4100.112.7269.722.419.1
in8151.6210.6210.258.634.38 1/213112 7/8
mm38141.1269.7260.4219.2111.312.7330.225.422.2
in1017.51.8812.7512.6210.754.62 1/215.251.12161   
mm444.547.8323.9320.5273.1117.312.7387.428.425.4
in1220.521514.7512.755.12 1/217.751.25161 1/8
mm520.750.8381374.7323.913012.7450.931.828.6
in14232.1216.2516.75145.62 1/220.251.25201 1/8
mm584.253.8412.8425.5355.6142.712.7514.431.828.6
in1625.52.2518.519165.75 1/222.51.38201 1/4
mm647.757.2469.9482.6406.4146.112.7571.535.131.8
in18282.382121186.25 1/224.751.38241 1/4
mm711.260.5533.4533.4457.2158.812.7628.735.131.8
in2030.52.52323.12206.38 1/2271.38241 1/4
mm774.763.5584.2587.2508162.112.7685.835.131.8
in24362.7527.2527.62246.62 1/2321.62241 1/2
mm914.469.9692.2701.5609.6168.112.7812.841.138.1

Note: Weld Neck flanges NPS 3″ and smaller are identical to Class 600 flanges and may be so marked.

(1)- Bore Diameter to be specified by purchaser.
(2)- Other NPT and SW connections available upon request

Welding Neck Orifice Class 300 Flange PDF (for printing).