MIL-DTL-5886H
4.5.8 Fragmentation resistance. Oxygen conforming to MIL-PRF-27210, type I
shall be the charging gas for oxygen cylinders. Cylinders shall be subjected to gunfire
under the following conditions:
a. The cylinder shall be charged to rated pressure at gun range ambient air temperature.
b. The cylinder may be supported but not constrained.
c. The ammunition shall be .50 caliber M-2, armor piercing, with muzzle velocity of
2,800 +100 feet per second (853 + 30 m/s).
d. The range shall be 50 yards (45.7 m) maximum.
e. The various cylinders taken for test shall be tested, each progressively, in a different
position, as follows:
(1) With the longitudinal axis of the cylinder normal to line of fire.
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(2) With the longitudinal axis of the cylinder 45 degrees (.785 rad) from normal
toward the gun position.
(3) With the longitudinal axis of the cylinder parallel to the line of fire with inlet
port face away from the gun position.
f. All shots shall be tumbled utilizing the method shown in Figure 1.
g. The tumbled projectile shall have a minimum velocity of 2,600 ft/sec (792 m/s) at the
point of impact with the cylinder.
h. The minimum size entry hole made by the tumbled projectile shall be 0.50 inch by
1.50 inch (13mm by 39mm).
i. Verify that the projectile trajectory and tumble are satisfactory. This may be
determined by the location and visual appearance of a hole made by the passage of the
projectile through vertically suspended sheets of paper at the target area.
The cylinder shall pass the requirements specified (see 3.4.6).
4.5.9 Exterior finish. Paint thickness shall be verified in accordance with ASTM D
7091, method B, to determine the total thickness of the film coating applied to the cylinder. The
minimum allowable thickness shall be as specified (see 3.6).
4.5.9.1 Humidity. Humidity resistance shall be verified using ASTM D 2247.
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Cylinders shall be exposed to 120 +5 F and 100% relative humidity for 7 days before
performing the test. The film coating after the test shall be as specified (see 3.6.1).
4.5.9.2 Adhesion. Adhesion shall be verified in accordance with ASTM D 3359,
method B, and have a classification of 4B (see 3.6.2).
4.5.10 Physical properties. Material samples taken from burst cylinder (see 4.5.5), as
specified (see 4.3.1) and Table I shall be tested for tensile strength and elongation in accordance
ASTM E8. The samples shall meet the requirements specified (see 3.4.7).
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