Dimensions of Class 1500 RF Weld Neck Flanges

Expired

All dimensions are in "mm" unless noted otherwise.

Dimensions of Class 1500 RF Weld Neck Flanges as per ASME B16.5.

Weld Neck Flange

Nominal
Pipe Size		 Outside Dia
of Flange
(O)		 Thick of
Flange
(C)		 Dia of
Raised Face
(R)		 Dia of
Hub at Base
(X)		 Dia of
Hub at End
(A)		 Length
thru Hub
(V)		 No of
Holes		 Dia of
Holes
(H)		 Dia of
Bolts		 Dia of
Bolt Circle
(B)		 Approx
weight
(kg)
1/2 120.7 22.4 35.1 38.1 21.3 60.5 4 22.4 3/4 82.6 2
3/4 130 25.4 42.9 44.5 26.7 69.9 4 22.4 3/4 88.9 3
1 149.4 28.4 50.8 52.3 33.5 73.2 4 25.4 7/8 101.6 4
1-1/4 158.8 28.4 63.5 63.5 42.2 73.2 4 25.4 7/8 111.3 5
1-1/2 177.8 31.8 73.2 69.9 48.3 82.6 4 28.4 1 124 6
2 215.9 38.1 91.9 104.6 60.5 101.6 8 25.4 7/8 165.1 11
2-1/2 244.3 41.1 104.6 124 73.2 104.6 8 28.4 1 190.5 16
3 266.7 47.8 127 133.4 88.9 117.3 8 31.8 1-1/8 203.2 22
4 311.2 53.8 157.2 162.1 114.3 124 8 35.1 1-1/4 241.3 33
5 374.7 73.2 185.7 196.9 141.2 155.4 8 41.1 1-1/2 292.1 59
6 393.7 82.6 215.9 228.6 168.4 171.5 12 38.1 1-3/8 317.5 75
8 482.6 91.9 269.7 292.1 219.2 212.9 12 44.5 1-5/8 393.7 125
10 584.2 108 323.9 368.3 273.1 254 12 50.8 1-7/8 482.6 206
12 673.1 124 381 450.9 323.9 282.4 16 53.8 2 571.5 313
14 749.3 133.4 412.8 495.3 355.6 298.5 16 60.5 2-1/4 635 426
16 825.5 146.1 469.9 552.5 406.4 311.2 16 66.5 2-1/2 704.9 567
18 914.4 162.1 533.4 569.9 457.2 327.2 16 73.2 2-3/4 774.7 737
20 984.3 177.8 584.2 641.4 508 355.6 16 79.2 3 831.9 930
24 1168.4 203.2 692.2 762 609.6 406.4 16 91.9 3-1/2 990.6 1508
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