June 02, 2024

All dimensions are in "mm" unless noted otherwise.

Dimensions of Class 150 RF Blind Flanges as per ASME B16.5.

 

Nominal
Pipe Size
OD of
Flange
(D)
Thickness
of Flange
(B)
Dia of
Raised Face
(G)
No of
Bolt
Holes
Dia of
Bolt Holes
(L)
Dia of
Bolt
(inches)
Dia of
Bolt Circle
(K)
Approx
Weight
(kg)
1/2 88.9 11.2 35.1 4 15.7 1/2 60.5 0.5
3/4 98.6 12.7 42.9 4 15.7 1/2 69.9 1
1 108 14.2 50.8 4 15.7 1/2 79.2 1
1-1/4 117.3 15.7 63.5 4 15.7 1/2 88.9 1
1-1/2 127 17.5 73.2 4 15.7 1/2 98.6 2
2 152.4 19.1 91.9 4 19.1 5/8 120.7 2
2-1/2 177.8 22.4 104.6 4 19.1 5/8 139.7 3
3 190.5 23.9 127 4 19.1 5/8 152.4 4
3-1/2 215.9 23.9 139.7 8 19.1 5/8 177.8 6
4 228.6 23.9 157.2 8 19.1 5/8 190.5 8
5 254 23.9 185.7 8 22.4 3/4 215.9 9
6 279.4 25.4 215.9 8 22.4 3/4 241.3 12
8 342.9 28.4 269.7 8 22.4 3/4 298.5 20
10 406.4 30.2 323.9 12 25.4 7/8 362 32
12 482.6 31.8 381 12 25.4 7/8 431.8 50
14 533.4 35.1 412.8 12 28.4 1 476.3 64
16 596.9 36.6 469.9 16 28.4 1 539.8 82
18 635 39.6 533.4 16 31.8 1-1/8 577.9 100
20 698.5 42.9 584.2 20 31.8 1-1/8 635 129
24 812.8 47.8 692.2 20 35.1 1-1/4 749.3 195

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