Code of Colorado Regulations
1200 - Department of Agriculture
1202 - Inspection and Consumer Services Division
8 CCR 1202-5 - STORAGE AND HANDLING OF ANHYDROUS AMMONIA
Appendix A
Minimum required rate of discharge in cubic feet per minute of air at 120 per cent of the maximum permitted start to discharge pressure for safety relief valves to be used on containers other than those constructed in accordance with United States Department of Transportation cylinder specifications.
|
Surface Area Sq. Ft. |
Flow Rate CFM Air |
Surface Area Sq. Ft. |
Flow Rate CFM Air |
Surface Area Sq. Ft. |
Flow Rate CFM Air |
Surface Area Sq. Ft. |
Flow Rate CFM Air |
|
20 |
258 |
145 |
1,310 |
340 |
2,640 |
1,350 |
8,160 |
|
25 |
310 |
150 |
1,350 |
350 |
2,700 |
1.400 |
8,410 |
|
30 |
360 |
155 |
1,390 |
360 |
2,760 |
1,450 |
8,650 |
|
35 |
408 |
160 |
1,420 |
370 |
2,830 |
1,500 |
8,900 |
|
40 |
455 |
165 |
1,460 |
380 |
2,890 |
1,550 |
9,140 |
|
45 |
501 |
170 |
1,500 |
390 |
2,960 |
1,600 |
9,380 |
|
50 |
547 |
175 |
1,530 |
400 |
3,010 |
1,650 |
9,620 |
|
55 |
591 |
180 |
1,570 |
450 |
3,320 |
1,700 |
9,860 |
|
60 |
638 |
185 |
1,600 |
500 |
3,620 |
1,750 |
10,090 |
|
65 |
678 |
190 |
1,640 |
550 |
3,910 |
1,800 |
10,330 |
|
70 |
720 |
195 |
1,670 |
600 |
4,200 |
1,850 |
10,560 |
|
75 |
762 |
200 |
1,710 |
650 |
4,480 |
1,900 |
10,800 |
|
80 |
804 |
210 |
1,780 |
700 |
4,760 |
1,950 |
11,030 |
|
85 |
845 |
220 |
1,850 |
750 |
5,040 |
2,000 |
11,260 |
|
90 |
885 |
230 |
1,920 |
800 |
5,300 |
2,050 |
11,490 |
|
95 |
925 |
240 |
1,980 |
850 |
5,590 |
2,100 |
11,720 |
|
100 |
965 |
250 |
2,050 |
900 |
5,850 |
2,150 |
11,950 |
|
105 |
1,010 |
260 |
2,120 |
950 |
6,120 |
2,200 |
12,180 |
|
110 |
1,050 |
270 |
2,180 |
1,000 |
6,380 |
2,250 |
12,400 |
|
115 |
1,090 |
280 |
2,250 |
1,050 |
6,640 |
2,300 |
12,630 |
|
120 |
1,120 |
290 |
2,320 |
1,100 |
6,900 |
2,350 |
12,850 |
|
125 |
1,160 |
300 |
2.380 |
1,150 |
7,160 |
2,400 |
13,080 |
|
130 |
1,200 |
310 |
2,450 |
1,200 |
7,410 |
2,450 |
13,300 |
|
135 |
1,240 |
320 |
2,510 |
1,250 |
7,660 |
2,500 |
13,520 |
|
140 |
1,280 |
330 |
2,570 |
1,300 |
7,910 |
Surface Area = Total Outside Surface Area of Container in Square Feet. When the Surface Area is not stamped on the name plate or when the marking is not legible, the area can be calculated by using one of the following formulas:
(1) Cylindrical container with hemispherical heads
Area = overall length in feet times outside diameter in feet times 3.1416.
(2) Cylindrical container with other than hemispherical heads
Area = (overall length in feet plus 0.3 outside diameter in feet) times outside diameter in feet times 3.1416.
(3) Spherical container
Area = outside diameter in feet squared times 3.1416.
Flow Rate- CFM Air = cubic feet per minute of air required at standard conditions, 60°F and atmospheric pressure (14.7 psia).
The rate of discharge may be interpolated for intermediate values of surface area. For containers with total outside surface area greater than 2.500 sq. ft., the required flow rate can be calculated using the formula, Flow Rate CFM Air = 22.11 A0.82 where A = outside surface area of the container in square feet.
