MIL-PRF-27201E
4.4.2 Gaseous purity and gaseous impurities. Methods shall be selected from those of
CGA G-5.3.
4.5 Containers of Type I hydrogen.
4.5.1 Filling Pressure. Containers shall be stabilized to 21°C (70°F). Containers shall be tested
for proper filling pressure by attaching a calibrated Bourdon-tube gauge or calibrated electronic equivalent
gauge to the valve outlet. The gauge shall have scale divisions not greater than 100 kPa (15 psi). Then
the valve shall be opened and the internal pressure observed on the gauge. If the internal pressure differs
from the applicable filling pressure value by more than 100 kPa (15 psi), the container, and all other
containers filled from the same manifold at the same time, shall be rejected.
4.5.2 Leakage. Each Type I hydrogen container shall be tested for leaks at the neck threads,
stem packing, and safety device of the valve with leak detection fluid. Valve seat leakage shall be tested
after filling has been completed by connecting a hose to the valve outlet and placing the other end of the
hose under the surface of a liquid. Methods of leak detection and/or the leak check guidance in CGA P-
15 may also be used.
4.5.3 Inspection and Maintenance. Compressed gas cylinders shall be inspected, maintained,
and charged according to MIL-STD-1411.
4.5.3.1 Valves. Valves shall conform to A-A-59860.
4.5.3.2 Color Coding. Government-owned cylinders shall be color coded according to MIL-STD-
101.
5.
PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the
contract or order (see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor
personnel, these personnel need to contact the responsible packaging activity to ascertain packaging
requirements. Packaging requirements are maintained by the Inventory Control Point's packaging
activities within the Military Service or Defense Agency, or within the military service's system commands.
Packaging data retrieval is available from the managing Military Department's or Defense Agency's
automated packaging files, CD-ROM products, or by contacting the responsible packaging activity.
6.
NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not
mandatory.)
6.1 Intended use. The propellant covered by this specification is intended for use as a fuel in
rocket engines and other space applications.
6.2 Acquisition requirements. Acquisition documents must specify the following:
a. Title, number, and date of this specification.
b. Type of hydrogen required (see 1.2).
c.
When other limits or tests are required (see 3.1).
d. When a variation in the points of inspection is required (see 4.1)
e. When a variation of the quality conformance tests to be performed on a sample is required
(see 4.2.4.1).
f.
When a variation to the sampling method is required (see 4.2.4.2).
g. When a variation to the continuous service option is required (see 4.2.6.1).
h. When a variation of the analytical procedures is required (see 4.4).
i.
Cylinder size, capacity and fill pressure (as determined by cylinder size and capacity).
6
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