Americase and Akro Fireguard have partnered to produce the HM224B Super Box. The HM 224B SuperBox meets ATA 300 Category 1 requirements, and is the Lightest container solution in the industry that is also the most Functional, the most Durable, and the most Affordable.
The HM 224B passes the flame penetration test in which the case must withstand a 1700° F flame for five minutes (Ref: Appendix E part 178 'Cargo Liner' Test). Additionally, the temperature four inches above the test article must not exceed 400° F. The SuperBox also passes the thermal resistance test in which the case is baked in an oven at 400° F for three hours. The temperature of the cylinder must not exceed 199° F. The HM 224B exceeds the requirements in both of these tests. Along with heat tests, the Americase HM 224B SuperBox has been subjected to numerous free-fall impact tests which closely simulate common material handling practices. The Americase HM 224B SuperBox is available for cylinder sizes of of 4.25 cu. ft. bottles thru 115 cu. ft. bottles.
HM 224B Super Box Documentation
- 4 cf O2 Bottle Case Drawings
- 11 cf O2 Bottle Case Drawings
- 49 cf O2 Bottle Case Drawings
- 76 cf O2 Bottle Case Drawings
- 115 cf O2 Bottle Case Drawings
October 2009 Mandatory Compliance Date for HM-224B
New Critical Requirements for all U.S. Commercial Airlines Carrying Oxygen Cylinders and Generators - Mandated by the Department of Transportation's Pipeline and Hazardous Materials Safety Administration (PHMSA) Rule HM-224B (CFR 49 Parts 173, 175 and 178). The new DOT31FP designation requires that containers for Oxygen Cylinders and Oxygen Generators not only meet the ATA 300 Category 1 requirements for Reusable Shipping Containers, but also meet the Flame and Heat Penetration requirements set forth in the HM-224B rule.
In addition to Compressed, Oxygen UN1072, the rule also lists four additional gases impacted which are Compressed Gas, Oxidizing, N.O.S. UN 3156; Liquefied Gas Oxidizing, N.O.S. UN 3157; Nitrogen Trifluoride UN 2451; and Nitrous Oxide UN 1070. These gases and Oxygen Generator, Chemical UN 3356 shipments all require an outer package that meets the DOT31FP specification.