MIL-DTL-6000D
4.7.2.3 Change to manufacturing process, materials or equipment. The manufacturer shall notify the
qualifying activity, in writing, of any changes in the manufacturing process, materials, or equipment used
to manufacture a QPL product. Subsequently, the qualifying activity shall notify the manufacturer, in
writing, if a full re-qualification, partial re-qualification, or no additional testing is required as a result of
these changes.
4.7.2.4 No production during reporting period. When no production occurs during the reporting
period, a report shall be submitted to the qualifying activity certifying that the manufacturer still has the
capability and facilities necessary to produce the QPL product. If during two consecutive 12 month
reporting periods there has been no production, the manufacturer may be required, at the discretion of
the qualifying activity, to submit QPL products to a full qualification inspection in accordance with this
specification.
4.8 Methods of inspection. The following identified tests and test methods assure hose integrity
within typical operating conditions and applications. Alternate commercial industry standard test methods
are allowed; however when an alternate method is used, documented approval must be obtained from
the qualifying activity prior to performing the test. The test methods described herein are proven methods
and shall be the referee method in case of dispute.
4.8.1 Visual inspection. Hose and hose assemblies shall be examined to ensure conformance with
this specification. Continuous examination shall be performed to assure compliance with the following
requirements:
a. Materials (see 3.3).
c Age (see 3.6)
d. Marking (see 3.7).
e. Workmanship (see 3.8).
4.8.2 Hydrostatic pressures.
4.8.2.1 Proof pressure (see 3.5.2.1). Proof pressure test shall be conducted in accordance with
ASTM D380 , hydrostatic testing. The hose shall be subjected to a hydrostatic pressure of 50 percent of
the minimum burst pressure specified in table II for not less than 30 seconds and not more than 3
minutes. The hose shall meet the requirements specified in 3.5.2.1.
4.8.2.2 Burst pressure (see 3.5.2.2). Burst pressure test shall be conducted in accordance with
ASTM D380, hydrostatic testing. The burst pressure of the hose shall meet the requirements specified in
4.8.2.3 Length change (see 3.5.2.3). A 10 inch (25.4 cm) length of hose (original) shall be subjected
to a hydrostatic pressure of 50 percent of the burst pressure specified in table II. The change in length of
the hose shall meet the requirements specified in 3.5.2.3.
4.8.3 Installation (see 3.5.3). The force to install a fitting end shall meet the requirements of 3.5.3.
The following details shall apply:
a. The tube of a 4 inch (10.2 cm) length of hose shall be lubricated with oil no. 1 in accordance
with ASTM D471.
b. A hose connection fitting end, in accordance with the nominal "B" and "C" dimensions, ±.001
inch (0.03 mm), of SAE-AS5132, shall be inserted .375 inch (9.53 mm) into the tube.
c. The hose and fitting shall be placed upright in a compression jig mounted in a standard
testing machine having a jaw speed of 1 inch per minute.
d. The force necessary to install the fitting into the hose shall be determined and recorded.
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