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| For
air-system use, K&B fabricates
round duct, either galvanized or
black steel, welded or brazed,
from 4" through 48" diameter,
and gauges from 20 to 10 depending
upon diameter requirements. Standard
lengths are shown below and may
be shop assembled in longer sections
to order. Duct may be furnished
with angle flanges for field bolting.
3/16" and heavier duct can
also be fabricated. Larger diameters
are also available. |
 |
| STANDARD DUCT
LENGTHS |
| Dia. of Duct |
NUMBER OF GAUGES--USS |
| 22 |
20 |
18 |
16 |
14 |
12 |
10 |
| 4" |
48" |
48" |
36" |
NA |
NA |
NA |
NA |
| 5" |
48" |
48" |
36" |
NA |
NA |
NA |
NA |
| 6" |
60" |
60" |
60" |
60" |
60" |
48" |
24" |
| 7" |
60" |
60" |
60" |
60" |
60" |
48" |
24" |
| 8" |
60" |
60" |
60" |
60" |
60" |
48" |
48" |
| 9" |
60" |
60" |
60" |
60" |
60" |
48" |
48" |
| 10" |
60" |
60" |
60" |
60" |
60" |
48" |
48" |
| 11" |
60" |
60" |
60" |
60" |
60" |
48" |
48" |
| 12" |
60" |
60" |
60" |
60" |
60" |
48" |
60" |
| 12" & UP |
60" |
60" |
60" |
60" |
60" |
48" |
60" |
|
| WEIGHT OF GALVANIZED
IRON DUCTS - POUNDS PER LINEAL
FOOT |
Dia. of
Duct |
22 |
20 |
18 |
16 |
14 |
12 |
10 |
| 4" |
1.7 |
2.0 |
2.6 |
NA |
NA |
NA |
NA |
| 5" |
2.1 |
2.4 |
3.2 |
NA |
NA |
NA |
NA |
| 6" |
2.5 |
2.9 |
3.8 |
4.5 |
5.8 |
7.7 |
9.8 |
| 7" |
2.9 |
3.3 |
4.4 |
5.3 |
6.7 |
9.0 |
11.4 |
| 8" |
3.3 |
3.8 |
5.0 |
6.0 |
7.8 |
10.3 |
13.1 |
| 9" |
3.7 |
4.3 |
5.6 |
6.7 |
8.7 |
11.6 |
13.1 |
| 10" |
4.1 |
4.7 |
6.2 |
7.4 |
9.7 |
12.9 |
14.7 |
| 11" |
4.4 |
5.2 |
6.8 |
8.1 |
10.6 |
14.1 |
16.3 |
| 12" |
4.8 |
5.6 |
7.4 |
8.9 |
11.3 |
15.4 |
17.6 |
| 13" |
5.2 |
6.1 |
8.0 |
9.6 |
12.5 |
16.6 |
19.4 |
| 14" |
5.6 |
6.5 |
8.6 |
10.3 |
13.4 |
17.8 |
20.9 |
| 15" |
6.0 |
7.0 |
9.2 |
10.9 |
14.4 |
19.2 |
22.5 |
| 16" |
6.4 |
7.5 |
9.8 |
11.7 |
15.3 |
20.4 |
24.0 |
| 17" |
6.8 |
7.9 |
10.4 |
12.5 |
16.2 |
21.6 |
25.7 |
| 18" |
7.3 |
8.5 |
11.2 |
13.4 |
17.4 |
23.2 |
27.3 |
| 19" |
7.7 |
9.0 |
11.8 |
14.1 |
18.4 |
24.6 |
29.2 |
| 20" |
8.1 |
9.5 |
12.4 |
14.9 |
19.4 |
25.9 |
31.0 |
| 21" |
8.4 |
9.8 |
12.9 |
15.4 |
20.2 |
26.6 |
32.6 |
| 22" |
8.9 |
10.4 |
13.6 |
16.3 |
21.3 |
28.3 |
33.6 |
| 23" |
9.3 |
10.8 |
14.4 |
17.0 |
22.4 |
29.7 |
35.7 |
| 24" |
9.7 |
11.3 |
14.8 |
17.7 |
23.1 |
30.8 |
37.5 |
| 25" |
10.1 |
11.7 |
15.4 |
18.4 |
24.1 |
32.1 |
38.9 |
| 26" |
10.5 |
12.2 |
16.0 |
19.2 |
25.0 |
33.3 |
40.5 |
| 27" |
10.9 |
12.7 |
16.6 |
19.9 |
26.0 |
34.6 |
42.0 |
| 28" |
11.3 |
13.1 |
17.3 |
20.6 |
26.9 |
35.9 |
43.8 |
| 29" |
11.6 |
13.6 |
17.8 |
21.3 |
27.8 |
37.1 |
45.3 |
| 30" |
12.2 |
14.2 |
18.6 |
22.3 |
29.1 |
38.8 |
46.8 |
| 31" |
12.5 |
14.6 |
19.2 |
23.0 |
29.9 |
40.0 |
50.5 |
| 32" |
12.9 |
15.1 |
19.8 |
23.7 |
30.8 |
41.2 |
52.0 |
| 33" |
13.3 |
15.6 |
20.4 |
24.4 |
31.8 |
42.5 |
53.5 |
| 34" |
13.7 |
16.0 |
21.1 |
25.2 |
32.8 |
43.8 |
55.2 |
| 35" |
14.1 |
16.5 |
21.7 |
25.9 |
33.7 |
45.0 |
56.7 |
| 36" |
14.5 |
16.9 |
22.2 |
26.6 |
34.6 |
46.3 |
58.4 |
| 37" |
14.9 |
17.4 |
22.8 |
27.3 |
35.8 |
47.5 |
60.0 |
| 38" |
15.3 |
17.8 |
23.4 |
28.0 |
36.4 |
48.7 |
61.5 |
| 39" |
15.6 |
18.3 |
24.0 |
28.7 |
37.4 |
50.0 |
63.0 |
| 40" |
16.1 |
18.8 |
24.7 |
29.5 |
38.4 |
51.3 |
64.6 |
| 41" |
16.5 |
19.2 |
25.6 |
30.2 |
39.3 |
52.5 |
66.2 |
| 42" |
16.9 |
19.6 |
25.9 |
30.9 |
40.2 |
53.7 |
67.8 |
| 43" |
17.4 |
20.3 |
26.6 |
31.8 |
41.4 |
55.4 |
69.6 |
| 44" |
17.8 |
20.7 |
27.3 |
32.6 |
42.4 |
56.6 |
71.5 |
| 45" |
18.2 |
21.2 |
27.9 |
33.3 |
43.3 |
58.0 |
73.0 |
| 46" |
18.6 |
21.6 |
28.4 |
34.0 |
44.2 |
59.2 |
74.6 |
| 47" |
19.0 |
22.1 |
29.0 |
34.7 |
45.1 |
60.5 |
76.1 |
| 48" |
19.4 |
22.6 |
29.7 |
35.5 |
46.1 |
61.8 |
77.8 |
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