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Flanges› Dimensions› ANSI / ASME› B16.47› B16.47 Series B› Class 300› Blind

ASME B16.47 Series B
Class 300 Blind

ASME B16.47 Series B Class 300 Blind Flange Technical Drawing
DIMENSIONAL DATA
NPS Flange
OD (O) 		Thickness
(T) 		Raised
Face
Diameter (R) 		Point
Fillet
Radius (r) 		Bolt Circle
Dia. 		No. of
Holes 		Diameter
of Bolt
Hole 		Hole
Dia.
26 34.12 3.44 29.00 0.56 31.62 32 1-3/8 1-1/4
28 36.25 3.44 31.00 0.56 33.75 36 1-3/8 1-1/4
30 39.00 3.63 33.25 0.56 36.25 36 1-1/2 1-3/8
32 41.50 4.00 35.50 0.62 38.50 32 1-5/8 1-1/2
34 43.62 4.00 37.50 0.62 40.62 36 1-5/8 1-1/2
36 46.12 4.00 39.75 0.62 42.88 32 1-3/4 1-5/8
38 48.12 4.31 41.75 0.62 44.88 36 1-3/4 1-5/8
40 50.12 4.50 43.88 0.62 46.88 40 1-3/4 1-5/8
42 52.50 4.63 46.00 0.62 49.00 36 1-7/8 1-3/4
44 54.50 4.94 48.00 0.62 51.00 40 1-7/8 1-3/4
46 57.50 5.06 50.00 0.62 53.75 36 2 1-7/8
48 59.50 5.25 52.25 0.62 55.75 40 2 1-7/8
50 61.50 5.44 54.25 0.62 57.75 44 2 1-7/8
52 63.50 5.61 56.25 0.62 59.75 48 2 1-7/8
54 65.88 5.81 58.25 0.62 62.12 48 2 1-7/8
56 69.50 6.12 60.50 0.69 65.00 36 2-3/8 2-1/4
58 71.94 6.31 62.75 0.69 67.44 40 2-3/8 2-1/4
60 73.94 6.50 65.00 0.69 69.44 40 2-3/8 2-1/4

Dimensions are based on ASME B16.47 Series B Class 300 flange requirements. Refer to the applicable standard for complete dimensional requirements.

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