38
AFMAN 24-204(I)/TM 38-250/NAVSUP PUB 505/MCO P4030.19H/ DLAI 4145.3
11 DECEMBER 2001
Figure A3.4. Filling Density for Cryogenic Liquids Except Hydrogen.
Pressure control valve setting (maximum start-
to-discharge pressure, kPa (psig.)
Maximum permitted filling density (percent by
weight)
Air
Argon
Nitrogen
Oxygen
Helium
Neon
310.3 (45)
82.5
133
76
108
12.5
109
517 (75)
80.3
130
74
105
12.5
104
724 (105)
78.4
127
72
103
12.5
100
1172 (170)
76.2
122
70
100
12.5
92
1585.8 (230)
75.1
119
69
98
12.5
85
2034 (295)
73.3
115
68
96
12.5
77
2482 (360)
70.7
113
65
93
12.5
3103 (450)
65.9
111
61
91
12.5
3723 (540)
62.9
107
58
88
12.5
4309 (625)
60.1
104
55
86
12.5
Design Service Temperature (degrees F)
-320
-320
-320
-320
-452
-411
(degrees C)
-196
-196
-196
-196
-269
-246
Figure A3.5. Filling Density for Cryogenic Liquids of Hydrogen.
Column 1
Column 2
Design service temperature
Minus 253 degrees C (-423 degrees
F) or colder
Maximum permitted filling density, based
on cylinder capacity at -253 degrees C (-423 degrees F)(see note)
6.7 percent
The pressure control valve must be designed and set to limit the
pressure in the cylinder to not more than
117 kPa (17 psig)
NOTE: The filling density for hydrogen, cryogenic liquid, is defined as the percent ratio of the weight of lading in
a package to the weight of water that the packaging will hold at -253 degrees C (-423 degrees F). The volume of the
packaging at -253 degrees C (-423 degrees F) is determined in cubic inches. The volume is converted to pounds of
water (1 pound of water = 27.737 cubic inches). Each cylinder must be constructed, insulated, and maintained so
that the total rate of venting must not be over 30 standard cubic feet (SCF) of hydrogen per hour during
transportation.
A3.3.2.6. Mandatory Color-Code Identification. Exact color-code identification of any material contained in a
compressed gas cylinder is mandatory and must meet MIL-STD-101.
A3.3.2.7. Foreign Cylinders. A foreign cylinder may not be offered for military airlift unless manufactured,
inspected, and tested according to 49 CFR, Part 178, or a copy of the competent authority approval of the nation
manufacturing the cylinder accompanies the shipment. All other requirements of this manual also apply.
HA3.3.2.8. Unregulated Compressed Gases. Compressed gasses in the following items are not regulated:
-
Inflated tires, when inflated to a pressure not greater than its rated inflation pressure.
-
Inflated balls used for sports.
-
Carbonated beverages.
-
Refrigerating machines, including dehumidifiers, air conditioners, and components thereof such as
precharged tubing containing 12 kg (25 pounds) or less of nonflammable liquefied gas.
HA3.3.2.9. Previously Authorized Cylinders. Cylinders marked with the prefix "ICC" (i.e. ICC-4BA240) are
authorized in place of cylinders required by this manual with a "DOT" prefix. The cylinders must comply with all
other applicable specification requirements for DOT cylinders.
HA3.3.3. Class 3.
A3.3.3.1. Combustible Liquids. The requirements in this manual do not apply to materials classed as combustible
liquid. See attachment 14 for marking requirements.
