Table 2c
Standard Cubic Feet Per Minute Flow Rate For
Gas
Based On A 6000 Feet Per Minute Velocity Through Sch.
40 Pipe
Pipe Size |
Absolute Pressure Of Flowing Gas - PSIA |
|||||||||||
25 |
50 |
75 |
100 |
150 |
200 |
250 |
300 |
400 |
500 |
600 |
700 |
|
1/4 |
7 |
15 |
22 |
30 |
44 |
59 |
74 |
89 |
118 |
147 |
177 |
206 |
3/8 |
13 |
27 |
41 |
54 |
81 |
108 |
135 |
162 |
216 |
270 |
324 |
376 |
1/2 |
22 |
43 |
65 |
86 |
129 |
172 |
215 |
258 |
344 |
430 |
516 |
602 |
3/4 |
38 |
75 |
113 |
151 |
226 |
302 |
378 |
453 |
604 |
755 |
906 |
1057 |
1 |
61 |
122 |
183 |
244 |
367 |
489 |
612 |
734 |
978 |
1222 |
1468 |
1712 |
1 1/4 |
106 |
212 |
318 |
423 |
635 |
847 |
1059 |
1270 |
1693 |
2115 |
2541 |
2964 |
1 1/2 |
144 |
288 |
432 |
576 |
864 |
1153 |
1442 |
1729 |
2304 |
2880 |
3459 |
4035 |
2 |
237 |
474 |
712 |
949 |
1425 |
1901 |
2376 |
2850 |
3798 |
4747 |
5701 |
6651 |
2 1/2 |
339 |
677 |
1016 |
1354 |
2033 |
2713 |
3391 |
4067 |
5420 |
6774 |
8134 |
9490 |
3 |
523 |
1045 |
1569 |
2091 |
3140 |
4189 |
5236 |
6280 |
8369 |
10459 |
12560 |
14654 |
3 1/2 |
700 |
1398 |
2099 |
2797 |
4199 |
5603 |
7003 |
8400 |
11194 |
13989 |
16799 |
19600 |
4 |
901 |
1800 |
2703 |
3602 |
5406 |
7213 |
9017 |
10815 |
14412 |
18011 |
21630 |
25235 |
5 |
1416 |
2828 |
4246 |
5659 |
8495 |
11334 |
14168 |
16992 |
22645 |
28300 |
33986 |
39650 |
6 |
2044 |
4084 |
6132 |
8172 |
12266 |
16367 |
20459 |
24538 |
32701 |
40867 |
49078 |
57257 |
8 |
3540 |
7074 |
10621 |
14153 |
21245 |
28346 |
35433 |
42498 |
56635 |
70779 |
84999 |
99165 |
10 |
5580 |
11150 |
16739 |
22307 |
33485 |
44677 |
55847 |
66982 |
89265 |
111557 |
133971 |
156298 |
12 |
7920 |
15825 |
23758 |
31661 |
47526 |
63411 |
79265 |
95070 |
126697 |
158336 |
190147 |
221840 |
Note:
To determine the flow rate for a steam or gas velocity other than 6000 fpm, multiply the
value from the appropriate table by the ratio (R):
Where Vm is the intended velocity of the flow rate.
Table 2d
To determine the flow rate for a 6000 fpm velocity for pipe other than schedule 40, multiply the value from the appropriate table, by the value from the following table for the desire pipe schedule and size:
Pipe Sch. |
|||||||||||||||||
1/4 |
3/8 |
1/2 |
3/4 |
1 |
11/4 |
11/2 |
2 |
21/2 |
3 |
31/2 |
4 |
5 |
6 |
8 |
10 |
12 |
|
| 80 | .69 |
.74 |
.77 |
.81 |
.83 |
.86 |
.87 |
.88 |
.89 |
.89 |
.90 |
.90 |
.91 |
.90 |
.91 |
.91 |
.91 |
| 160 | ¾ |
¾ |
.56 |
.56 |
.60 |
.71 |
.69 |
.67 |
.74 |
.73 |
¾ |
.73 |
.73 |
.73 |
.73 |
.72 |
.72 |
| Dbl. Ex. | ¾ |
¾ |
.16 |
.28 |
.33 |
.42 |
.47 |
.53 |
.51 |
.56 |
.59 |
.61 |
.65 |
.65 |
.65 |
¾ |
¾ |