ASME B16.47 Series B
Class 900 Weld Neck

ASME B16.47 Series B Class 900 Weld Neck Flange Technical Drawing
DIMENSIONAL DATA
NPS Flange
OD (O)
Thickness
(T)
Raised
Face
Diameter (R)
Hub
Diameter (X)
Hub
Length (Y)
Point
Fillet
Radius (r)
Top of
Hub (A)
Bore
(B)
Bolt Circle
Dia.
No. of
Holes
Diameter
of Bolt
Hole
Hole
Dia.
26 40.25 5.31 30.00 29.25 10.19 0.44 26.00 Specified
by
purchaser
35.50 20 2-5/8 2-1/2
28 43.50 5.81 32.25 31.38 10.88 0.50 28.00 Specified
by
purchaser
38.25 20 2-7/8 2-3/4
30 46.50 6.12 34.50 33.50 11.38 0.50 30.00 Specified
by
purchaser
40.75 20 3-1/8 3
32 48.75 6.31 36.50 35.75 11.94 0.50 32.00 Specified
by
purchaser
43.00 20 3-1/8 3
34 51.75 6.75 39.00 37.88 12.56 0.56 34.00 Specified
by
purchaser
45.50 20 3-3/8 3-1/4
36 53.00 6.81 40.50 40.00 12.81 0.56 36.00 Specified
by
purchaser
47.25 24 3-1/8 3
38 57.50 7.50 43.25 42.25 13.88 0.75 38.00 Specified
by
purchaser
50.75 20 3-5/8 3-1/2
40 59.50 7.75 45.75 44.38 14.31 0.81 40.00 Specified
by
purchaser
52.75 24 3-5/8 3-1/2
42 61.50 8.12 47.75 46.31 14.62 0.81 42.00 Specified
by
purchaser
54.75 24 3-5/8 3-1/2
44 64.88 8.44 50.00 48.62 15.38 0.88 44.00 Specified
by
purchaser
57.62 24 3-7/8 3-3/4
46 68.25 8.88 52.50 50.88 16.18 0.88 46.00 Specified
by
purchaser
60.50 24 4-1/8 4
48 70.25 9.19 54.50 52.88 16.50 0.94 48.00 Specified
by
purchaser
62.50 24 4-1/8 4

Dimensions are based on ASME B16.47 Series B Class 900 flange requirements. Refer to the applicable standard for complete dimensional requirements.

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