awwa flanges

METAL-KOREA
82
83
GENERAL SPECIFICATIONS
AWWA
FLANGES
AWWA C207 FLANGES
Grneral Specifications
1. Standard Finishes for Contact Face of AWWA Flange
Class B & D Flanges
Table 2
Class D Flanges
Table 3
Class E Flanges
Table 4
Flanges of all classes shall be flat faced-that is, without projection or raised face. The dimensions given for
thickness are minimum. the flanges shall be faced smooth or may have a serrated finish of approximately 32
serrations per inch, approximately 1/64 in. deep. Serrations may be either spiral or concentric.
2. Dimensional Tolerances for AWWA Flanges
Dimension
Tolerance in
Bore
+1/16 -0
Outside diameter
±1/8
Thickness
18 in and smaller
+1/8 -0
20 in and smaller
+3/16 -0
Length through Hub
+3/16 -1/16
Bolt Circle Diameter
±1/16
Note; For other dimensional tolerances, see ANSI B16.5, page 49.
3. Bolting
Bolts and nuts shall be carbon steel ASTM A307, Grades A or B. Bolts shall have regular unfinished square
or hexagonal heads, and nuts shall have regular square or hexagonal dimensions all in accordance with
ANSI B 18.21 for wrench head bolts and nuts and wrench openings.
All bolts and nuts shall be threaded in accordance with ANSI B1.1 for screw threads, coares-thread series,
Class 2A and 2B fit.
M
E
T
A
L
-
K
O
R
E
A
F
L
A
N
G
E
S
4. Gaskets
These standards are predicated on the user of either a cloth-inserted rubber gasket 1/16 in. thick or an
absestos ring gasket that is either 1/16 in. or 1/8 in. thick, at the purchaser's option; The gasket shall
extend from the inside diameter or the flange to at least the inside edge of the bolt holes, or it may.
84
METAL-KOREA
METAL-KOREA
CLASS B & D FLANGES
TABLE 2
85
CLASS B & D FLANGES
TABLE 3
AWWA Standard Steel Ring Flanges, Class B (86 psi)and Class D (175-150 psi)
SLIP-ON
BLIND
SLIP-ON
AWWA C207
Nominal
Pipe
Unit:mm
DRILLING
Outside
Bore
Thickness
Bolt
Circle
Diam.
Diam.
Size
4
5
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
60
66
72
78
84
90
96
102
108
114
120
D
B
Class B(t)
Class D(t)
C
9
10
11
131/2
16
19
21
231/2
25
271/2
291/2
32
341/4
361/2
383/4
413/4
433/4
46
483/4
503/4
53
551/4
571/4
591/2
613/4
64
661/4
73
80
861/2
93
993/4
1061/2
1131/4
120
1263/4
1331/2
1401/4
4.57
5.66
6.72
8.72
10.88
12.88
14.19
16.19
18.18
20.19
22.19
24.19
26.19
28.19
30.19
32.19
34.19
36.19
38.19
40.19
42.19
44.19
46.19
48.19
50.19
52.19
54.19
60.19
66.19
72.19
78.19
84.19
90.19
96.19
102.19
108.19
114.19
120.19
5/8
5/8
5/8
5/8
11/16
11/16
11/16
11/16
11/16
11/16
11/16
11/16
11/16
11/16
11/16
13/16
71/2
81/2
91/2
113/4
141/4
17
183/4
211/4
223/4
25
271/4
291/2
313/4
34
36
381/2
401/2
423/4
451/4
471/4
491/2
513/4
533/4
56
581/4
601/2
623/4
691/4
76
821/2
89
951/2
102
1081/2
1141/2
1203/4
1263/4
1323/4
3/4
3/4
13/16
7/8
7/8
15/16
15/16
1
1
1
11/8
11/8
11/8
11/4
11/4
11/4
13/8
11/2
15/8
13/4
2
2
21/4
21/4
21/2
21/2
23/4
23/4
15/16
1
11/16
11/8
13/16
11/4
15/16
15/16
13/8
11/2
11/2
15/8
15/8
15/8
13/4
13/4
13/4
13/4
2
2
21/6
21/4
21/2
25/8
23/4
23/4
3
3
31/4
31/4
31/2
31/2
Diam. of
Bolt Holes
Number
of
Holes
8
8
8
8
12
12
12
16
16
20
20
20
24
28
28
28
32
32
32
36
36
40
40
44
44
44
44
52
52
60
64
64
68
68
72
72
76
76
Class D
3/4
3/4
3/4
7/8
3/4
7/8
3/4
7/8
3/4
1
1
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
1
1
1
1
1
1
11/8
11/8
11/8
11/8
11/4
11/4
13/4
13/8
13/8
13/8
15/8
15/8
17/8
17/8
21/8
21/8
23/8
23/8
Nominal
Outside
Pipe
Diam.
Bore
Thickness
11/8
11/8
11/4
11/4
13/6
13/8
13/8
13/8
13/8
15/8
15/8
15/8
15/8
15/8
15/8
15/8
15/8
15/8
17/8
17/9
17/8
17/8
17/8
17/8
21/8
21/8
23/8
23/8
25/8
25/8
27/8
27/8
4
5
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
60
66
72
78
84
90
96
102
108
114
120
D
B
9
10
11
131/2
16
19
21
231/2
25
271/2
291/2
32
341/4
361/2
383/4
413/4
433/4
46
483/4
503/4
53
551/4
571/4
591/2
613/4
64
661/4
73
80
861/2
93
993/4
1061/2
1131/4
120
1263/4
1331/2
1401/4
4.57
5.66
6.72
8.72
10.88
12.88
14.19
16.19
18.18
20.19
22.19
24.19
26.19
28.19
30.19
32.19
34.19
36.19
38.19
40.19
42.19
44.19
46.19
48.19
50.19
52.19
54.19
60.19
66.19
72.19
78.19
84.19
90.19
96.19
102.19
108.19
114.19
120.19
DRILLING
Length
Through
Hub
Diam. of
Hub
at Base
T
X
C
1/2
7/8
9/16
11/4
11/4
11/4
11/4
11/4
11/4
11/4
11/4
11/4
13/4
13/4
13/4
13/4
13/4
13/4
13/4
13/4
13/4
13/4
13/4
21/4
21/4
21/2
21/2
21/2
21/2
23/4
23/4
23/4
3
3
31/4
31/4
31/2
31/2
33/4
33/4
55/16
65/16
79/16
911/16
12
143/8
153/4
18
197/8
22
241/4
261/8
281/2
301/2
321/2
343/4
363/4
383/4
403/4
43
45
47
49
51
53
55
57
63
69
75
811/4
871/2
933/4
100
1053/4
1111/2
1173/4
124
71/2
81/2
91/2
113/4
141/4
17
183/4
211/4
223/4
25
271/4
291/2
314/3
34
36
382/1
402/1
423/4
451/4
471/4
492/1
513/4
533/4
56
581/4
601/2
623/4
691/4
76
821/2
89
951/2
102
1081/2
1141/2
1203/4
1263/4
1323/4
Size
Class B
3/4
Unit:mm
t
9/16
9/16
11/16
11/16
3/4
3/4
3/4
3/4
1
1
1
1
1
11/8
11/8
11/8
11/8
11/8
11/4
11/4
11/4
13/8
13/8
13/8
13/8
11/2
11/2
11/2
13/4
13/4
2
2
21/4
21/4
21/2
21/2
Bolt
Circle
Diam.
Diam. of
Bolt Holes
Number
of Holes
8
8
8
8
12
12
12
16
16
20
20
20
24
28
28
28
32
32
32
36
36
40
40
44
44
44
44
52
52
60
64
64
68
72
72
72
76
76
Class B
Class D
3/4
3/4
3/4
7/8
3/4
7/8
3/4
7/8
3/4
1
1
3/4
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
1
1
1
1
1
1
11/8
11/8
11/8
11/8
11/4
11/4
13/8
13/8
13/8
13/8
15/8
15/8
17/8
21/8
21/8
21/8
23/8
23/8
11/8
11/8
11/4
11/4
13/8
13/8
13/8
13/8
13/8
15/8
15/8
15/8
15/8
15/8
15/8
15/8
15/8
15/8
17/8
17/8
17/8
17/8
17/8
17/8
21/8
21/8
23/8
25/8
25/8
25/8
27/8
27/8
Notes:
Notes:
(1) The 'Bore' (B) shall be 3/16 in. larger than the nominal outside diameter of the pipe, unless otherwise specified.
(1) For standard finishes for contact face, refer to apge 48.
(2) For Slip-on Flanges, (Hub Type Flanges), the hubs can be shaped either vertical from base to top or tapered within the limits of 7 degrees.
(3) The 'Bore' (B) shall be 3/16 in. larger than the nominal outside diameter of the pipe, unless otherwise specified.
86
METAL-KOREA
CLASS E FLANGES TABLE 4
AWWA Standard Steel Hub Flanges, Class E (275 psi)
SLIP-ON
AWWA C207
Nominal
Outside
Pipe
Diam.
Unit:mm
Bore
Thickness
Size
4
5
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
60
66
72
78
84
90
96
102
108
114
120
Length
Through
Hub
Diam. of
Hub
at Base
DRILLING
Bolt
Circle Diam.
D
B
t
T
X
C
9
10
11
131/2
16
19
21
231/2
25
271/2
291/2
32
341/4
361/2
383/4
413/4
433/4
46
483/4
503/4
53
551/4
571/4
591/2
613/4
64
661/4
73
80
861/2
93
993/4
1061/2
1131/4
120
1263/4
1331/2
1401/4
4.57
5.66
6.72
8.72
10.88
12.88
14.19
16.19
18.18
20.19
22.19
24.19
26.19
28.19
30.19
32.19
34.19
36.19
38.19
40.19
42.19
44.19
46.19
48.19
50.19
52.19
54.19
60.19
66.19
72.19
78.19
84.19
90.19
96.19
102.19
108.19
114.19
120.19
15/16
15/16
17/16
19/16
13/4
115/16
23/16
21/4
21/2
211/16
27/8
31/8
31/4
33/8
37/16
31/2
35/8
311/16
33/4
33/4
37/8
4
4
41/16
41/8
41/8
41/4
43/8
41/2
47/8
5
53/8
53/8
53/4
53/4
61/8
61/8
61/4
61/2
55/16
67/16
79/16
911/16
12
143/8
153/4
18
197/8
22
24
261/8
281/2
303/4
323/4
35
37
391/4
413/4
433/4
46
48
50
521/4
541/4
561/2
583/4
651/4
711/2
781/2
841/2
901/2
963/4
1023/4
1083/4
1141/2
1211/4
128
71/2
81/2
91/2
113/4
141/4
17
183/4
211/4
223/4
25
271/4
291/2
314/3
34
36
381/2
401/2
423/4
451/4
471/4
491/2
513/4
533/4
56
581/4
601/2
623/4
691/4
76
831/2
89
951/2
102
1081/2
1141/2
1203/4
1263/4
1323/4
15/16
1
11/8
15/16
11/4
13/8
17/16
19/16
111/16
113/16
17/8
2
21/16
21/8
21/4
25/16
23/8
23/8
21/2
25/8
25/8
211/16
23/4
23/4
27/8
3
31/8
33/8
31/2
37/8
37/8
41/4
41/4
45/8
45/8
5
5
Notes:
(1) The 'Bore' (B) shall be 3/16 in. larger than the nominal outside diameter of the pipe, unless otherwise specified.
Number
of Holes
Diam. of
Bolt Holes
8
8
8
8
12
12
12
16
16
20
20
20
24
28
28
28
32
32
32
36
36
40
40
44
44
44
44
52
52
60
64
64
68
68
72
72
76
76
3/4
7/8
7/8
7/8
1
1
11/8
11/8
11/4
11/4
13/8
13/8
13/8
13/8
13/8
15/8
15/8
15/8
15/8
15/8
15/8
15/8
15/8
15/8
17/8
17/8
17/8
17/8
17/8
17/8
21/8
21/8
23/8
23/8
25/8
25/8
27/8
27/8