MIL-DTL-26499E
2.4 Order of precedence. In event of a conflict between the text of this document and the references
cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes
applicable laws and regulations unless a specific exemption has been obtained.
3. REQUIREMENTS
3.1 Qualification. The hose assemblies furnished under this specification shall be products that are
authorized by the qualifying activity for listing on the applicable qualified products list before contract
3.2 Components. The hose assembly shall consist of the following major components:
a. Corrugated hose (see 3.4.1).
b. Internal support coil (see 3.4.2)
b. Braided outer covering (see 3.4.3).
c. End connections (see 3.4.4).
3.3 Materials. All parts of the hose assembly shall be made of corrosion resistant metal. No materials
shall be used that are toxic or give of toxic fumes, deteriorate easily, or are otherwise adversely affected
by continued use with high-pressure oxygen, or that are subject to deterioration when exposed to climatic
and environmental conditions likely to occur during service usage (see 6.1.4).
3.3.1 Recycled, recovered, or environmentally preferable material. Recycled, recovered, or
environmentally preferable materials should be use to the maximum extent possible, provided that the
material meets or exceeds the operational and maintenance requirements, and promotes economically
advantageous life cycle costs.
3.4 Design and construction. The design and construction of the hose assembly shall be specified on
figure 1. Nominal lengths shall be as specified (see figure 1 and 6.2). The hose shall be constructed to
meet the requirements specified herein and to retain the end fittings without slipping or leaking when
tested as specified in section 4. The hose assembly shall be designed for a 99.5 percent purity gaseous
oxygen working pressure of 2,400 psi (165.47 bar) and a minimum hydrostatic burst pressure of 9,600
pounds per square inch gage (psig) (661.90 bar).
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