MIL-DTL-83298C
4. VERIFICATION
4.1 Classification of inspection. The inspection requirements specified herein are classified as
follows:
a. Qualification inspection (see 4.4).
4.2 Test equipment and inspection facilities. Test and measuring equipment and inspection
facilities of sufficient accuracy, quality, and quantity to permit performance of the required inspection shall
be established and maintained or identified by the contractor. The establishment and maintenance of a
calibration system to control the accuracy of the measuring and test equipment shall be in accordance
with ISO 17025 and NCSL Z540.3 as applicable.
4.3 Inspection conditions. Unless otherwise specified, all testing shall be conducted at an
atmospheric pressure within the range of 28 to 31 inches of mercury (71.1 to 78.7 cm of mercury), a
temperature between 60°F and 100°F (15.6°C and 37.8°C), and a relative humidity of not more than 90%.
Tolerances of the test conditions are as follows:
a. Temperature: +10°F, -5°F (+5.55°C, -2.8°C)
b. Pressure (gauge): ±5%
4.3.1 Stabilization of test temperatures. Unless otherwise specified, the test temperature in the
chamber shall be stabilized before conducting the test (see 6.6.1).
4.3.2 Test fluids. Unless otherwise specified, the pressure test fluid shall be hydraulic fluid in
accordance with MIL-PRF-5606, MIL-PRF-83282, MIL-PRF-87257, or water (proof, burst or leakage test
only). When a high temperature test fluid is specified the test fluid shall be lubricating oil in accordance
with MIL-PRF-7808.
4.3.3 Oil aging. In all of the tests using oil-aged samples, the assembly shall be filled with a high
temperature test fluid and soaked in an air oven at a temperature of 400°F (204°C) for 7 days. All air
shall be excluded from the bore of the assembly during the test.
4.3.4 Air aging. In all of the tests using air aged samples the hose assemblies shall be kept at a
temperature of 400°F (204°C) for 7 days.
4.4 Qualification inspection (see 6.3). Qualification inspection shall be performed at a laboratory
acceptable to the qualifying activity on sample units produced with equipment and procedures used in
production.
4.4.1 Samples for qualification. Samples for qualification shall be representative of the products
proposed to be furnished to this specification. Test samples shall consist of 16 assemblies of each size
and length, as well as two 6-inch (152 mm) and two 14-inch (356 mm) lengths of tubing (reinforcement
removed) of each size, as specified in table V. Hose assemblies shall be made up from hose specified
herein and end fittings in accordance with MIL-DTL-83296. Hose shall be qualified with fittings from a
minimum of two specific qualified manufacturers. Test samples shall be examined and tested by the
manufacturer activity in accordance with this specification and the results will be submitted to the
qualifying activity.
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