LARGE DIAMETER FLANGES SERIES B / API 605 ASME B16.47 Class 600

SERIES B FLANGES

Nominal
Size
NPS
Outside
Diameter
of
Flange
Thickness
of
Flange
Length
thru
Hub
Diameter Of Hub At Base Diameter Of Hub At Point of Welding Diameter Of Raised
Face
Diameter
of
Bolt
Circle
Number of
Bolt Holes
Diameter
of
Bolt
Holes
Diameter
of
Bolts
Fillet Radius Min
WNF BLIND
O C C Y X A R r1
26 in. 35 4.38 4.38 7.12 27.5 26 28.62 31.75 28 1.75 1 5/8 0.5
mm 889 111.3 111.3 180.8 698.5 660.4 726.9 806.5 44.5 41.3 12.7
28 in. 37.5 456 4.56 7.5 29.62 28 30.88 34 28 1.88 1 ¾ 0.5
mm 952.5 1158 115.8 190.5 752.3 711.2 784.4 863.6 47.8 44.5 12.7
30 in. 40.25 4.94 5 8.06 31.75 30 33.12 36.5 28 2 1 7/8 0.5
mm 1022.4 125.5 127 204.7 806.5 762 841.2 927.1 50.8 47.6 12.7
32 in. 42 75 5.12 5.31 8.5 33.88 32 35.25 38.75 28 2.12 2 0.5
mm 1085.9 130 134.9 215.9 860.6 812.8 895.4 984.3 53.8 50.8 12.7
34 in. 45.75 5.56 5.68 9.19 36 34 37.5 41.5 24 2.38 2 ¼ 0.56
mm 1162.1 141.2 144.3 233.4 914.4 863.6 952.5 1054.1 60.5 57.2 14.2
36 in. 47.75 5.76 5.94 9 56 38 12 36 39.75 43.5 28 2.38 2 ¼ 0.56
mm 1212.9 146.3 150.9 242 8 968 2 914.4 1009.7 1104.9 60.5 57.2 14.2
38 in.
mm
40 in.
mm
42 in.
mm
44 in.
mm
46 in.
mm
48 in. Sizes 38″ thru 60″ are identical to Series A, Class 600 Flanges
mm
50 in.
mm
52 in.
mm
54 in.
mm
56 in.
mm
58 in.
mm
60 in.
mm

(1) Bore diameter to be specified by the purchaser.

(2) When this flanges are require with flat face, either the full thickness or thickness with raised face removed may be furnished. Users are reminded that removing the raised face will make the length through hub nonstandard.