DESIGN AID
International designations for flanges
INTERNATIONAL DES IGNATIONS FOR FLANGES
CIRCULAR PIN FLANGE
WAVEGUIDE
FLANGES
OFFICIAL DESIGNATIONS: IEC NORM
NORM: EIA
NORM: EIA
FLANGE
WAVEGUIDE
R - ( )
NORM: IEC
NORM: EIA
WR - ( )
A
B
C
D
E
F
WR - ( )
WR - ( )
C(1)
R - ( )
IEC-P(2)
U(3)
BRASS
CA-R( ) CB-R( ) PA-R( ) PB-R( ) PC-R( ) PD-R( ) PF-R( ) UA-R( ) UB-R( ) UD-R( ) UE-R( )
1
2
3
4
5
6
7
8
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
2300
2100
1800
1500
1150
975
770
650
510
430
340
284
229
187
159
137
112
90
75
62
51
42
34
28
22
19
3
4
5
6
8
9
12
14
18
22
26
32
40
48
58
70
84
100
120
140
180
220
260
320
400
500
620
740
900
1200
1400
1800
2200
2600
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
381
383
383 N
385
67 B005
67 B006
67 B007
67 B008
67 B009
67 B010
74 - 001
74 - 002
74 - 003
X
X
X
X
15
12
10
8
7
5
4
3
387
387 M
387 M
387 M
387 M
UH-R
X
X
35
41
NOTES:
(1) pressurizable with “choke flanges”
(2) pressurizable
(3) no-pressurizable
15-53
Vol. 1
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