Under ground: Container and system nameplate.
Above ground: Container.
Under ground and above ground: System nameplate.
Under ground: Container and system nameplate.
Above ground: Container.
Under ground: Container and system nameplate.
Above ground: Container.
Under ground: Container and system nameplate.
Above ground: Container.
Above ground and under ground: System nameplate or on liquid-level gaging device.
Under ground: System nameplate.
Above ground: No requirement.
"Anhydrous Ammonia" xxx p.s.i.g. (maximum working pressure), manufacturer's name or trademark, year of manufacture.
In lieu of this requirement the same information may be contained on a nameplate permanently attached to the hose.
Table H-36
[Minimum required rate of discharge in cubic feet per minute of air at 120 percent of the maximum permitted start to discharge pressure of safety relief valves]
Surface area (sq. ft.) | Flow rate CFM air |
20 | 258 |
25 | 310 |
30 | 360 |
35 | 408 |
40 | 455 |
45 | 501 |
50 | 547 |
55 | 591 |
60 | 635 |
65 | 678 |
70 | 720 |
75 | 762 |
80 | 804 |
85 | 845 |
90 | 885 |
95 | 925 |
100 | 965 |
105 | 1,010 |
110 | 1,050 |
115 | 1,090 |
120 | 1,120 |
125 | 1,160 |
130 | 1,200 |
135 | 1,240 |
140 | 1,280 |
145 | 1,310 |
150 | 1,350 |
155 | 1,390 |
160 | 1,420 |
165 | 1,460 |
170 | 1,500 |
175 | 1,530 |
180 | 1,570 |
185 | 1,600 |
190 | 1,640 |
195 | 1,670 |
200 | 1,710 |
210 | 1,780 |
220 | 1,850 |
230 | 1,920 |
240 | 1,980 |
250 | 2,050 |
260 | 2,120 |
270 | 2,180 |
280 | 2,250 |
290 | 2,320 |
300 | 2,380 |
310 | 2,450 |
320 | 2,510 |
330 | 2,570 |
340 | 2,640 |
350 | 2,700 |
360 | 2,760 |
370 | 2,830 |
380 | 2,890 |
390 | 2,950 |
400 | 3,010 |
450 | 3,320 |
500 | 3,620 |
550 | 3,910 |
600 | 4,200 |
650 | 4,480 |
700 | 4,760 |
750 | 5,040 |
800 | 5,300 |
850 | 5,590 |
900 | 5,850 |
950 | 6,120 |
1,000 | 6,380 |
1,050 | 6,640 |
1,100 | 6,900 |
1,150 | 7,160 |
1,200 | 7,410 |
1,250 | 7,660 |
1,300 | 7,910 |
1,350 | 8,160 |
1,400 | 8,410 |
1,450 | 8,650 |
1,500 | 8,900 |
1,550 | 9,140 |
1,600 | 9,380 |
1,650 | 9,620 |
1,700 | 9,860 |
1,750 | 10,090 |
1,800 | 10,330 |
1,850 | 10,560 |
1,900 | 10,800 |
1,950 | 11,030 |
2,000 | 11,260 |
2,050 | 11,490 |
2,100 | 11,720 |
2,150 | 11,950 |
2,200 | 12,180 |
2,250 | 12,400 |
2,300 | 12,630 |
2,350 | 12,850 |
2,400 | 13,080 |
2,450 | 13,300 |
2,500 | 13,520 |
Surface Area = total outside surface area of container in square feet. When the surface area is not stamped on the nameplate 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 p.s.i.a.).
The rate of discharge may be interpolated for intermediate values of surface area. For containers with total outside surface area greater than 2,500 square feet, 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.
Containers | Minimum (percent) | Maximum (percent) |
ASME-U-68, U-69 | 110 | 125 |
ASME-U-200, U-201 | 95 | 100 |
ASME 1959, 1956, 1952, or 1962 | 95 | 100 |
API-ASME | 95 | 100 |
U.S. Coast Guard | 95 | 100 |
As required by DOT Regulations.
Type of container | Percent by weight | Percent by volume |
Aboveground-Uninsulated | 56 | 82 |
Aboveground-Uninsulated | 87.5 | |
Aboveground-Insulated | 57 | 83.5 |
Underground-Uninsulated | 58 | 85 |
DOT-In accord with DOT regulations. |
Paragraph (b) of this section applies to this paragraph unless otherwise noted. Containers and pertinent equipment for tank motor vehicles for the transportation of anhydrous ammonia, in addition to complying with the requirements of this section, shall also comply with the requirements of DOT.
29 C.F.R. §1910.111