Dimensions of Class 300 RF Threaded Flanges

Expired

All dimensions are in "mm" unless noted otherwise.

Dimensions of Class 300 RF Threaded Flanges as per ASME B16.5.

Threaded Flange

Nominal
Pipe Size		 Outside Dia
of Flange
(D)		 Thick of
Flange
(B)		 Dia of
Raised Face
(G)		 Dia of
Hub at Base
(A)		 Length
thru Hub
(H)		 Min Thread
Length
(T)		 Min Counter
Bore
(Q)		 No of
Holes		 Dia of
Holes
(L)		 Dia of
Bolts
(inch)		 Dia of
Bolt Circle
(K)		 Approx
Weight
(kg)
1/2 95.3 14.2 35.1 38.1 22.4 15.7 23.6 4 15.7 1/2 66.5 1
3/4 117.3 15.7 42.9 47.8 25.4 15.7 29 4 19.1 5/8 82.6 1
1 124 17.5 50.8 53.8 26.9 17.5 35.8 4 19.1 5/8 88.9 1
1-1/4 133.4 19.1 63.5 63.5 26.9 20.6 44.5 4 19.1 5/8 98.6 2
1-1/2 155.4 20.6 73.2 69.9 30.2 22.4 50.5 4 22.4 3/4 114.3 3
2 165.1 22.4 91.9 84.1 33.3 28.4 63.5 8 19.1 5/8 127 3
2-1/2 190.5 25.4 104.6 100.1 38.1 31.8 76.2 8 22.4 3/4 149.4 5
3 209.6 28.4 127 117.3 42.9 31.8 92.2 8 22.4 3/4 168.1 6
3-1/2 228.6 30.2 139.7 133.4 44.5 36.6 104.9 8 22.4 3/4 184.2 8
4 254 31.8 157.2 146.1 47.8 36.6 117.6 8 22.4 3/4 200.2 10
5 279.4 35.1 185.7 177.8 50.8 42.9 144.5 8 22.4 3/4 235 13
6 317.5 36.6 215.9 206.2 52.3 46 171.5 12 22.4 3/4 269.7 18
8 381 41.1 269.7 260.4 62 50.8 222.3 12 25.4 7/8 330.2 26
10 444.5 47.8 323.9 320.5 66.5 55.6 276.4 16 28.4 1 387.4 37
12 520.7 50.8 381 374.7 73.2 60.5 328.7 16 31.8 1-1/8 450.9 52
14 584.2 53.8 412.8 425.5 76.2 63.5 360.4 20 31.8 1-1/8 514.4 75
16 647.7 57.2 469.9 482.6 82.6 68.3 411.2 20 35.1 1-1/4 571.5 86
18 711.2 60.5 533.4 533.4 88.9 69.9 462 24 35.1 1-1/4 628.7 113
20 774.7 63.5 584.2 587.2 95.3 73.2 512.8 24 35.1 1-1/4 685.8 143
24 914.4 69.9 692.2 701.5 106.4 82.6 614.4 24 41.1 1-1/2 812.8 215
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