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.