MIL-DTL-83797C
4.5.6.6 No production during reporting period (12 months). 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.
4.5.6.6.1 Discontinuation and resumption of production of bulk hose (3 years or more). If there has
been no production of a specific size hose for a period of 3 years or more, six samples of that particular
size hose shall be subjected to sampling and periodic inspections. Two hoses shall be subjected to
sampling inspection and four hoses shall be subjected to the periodic inspection (see table VIII).
4.5.6.6.2 Acceptance of conformance inspection data. For identical requirements and test
procedures, using an identical fitting, conformance inspection data specified in MIL-DTL-83796 or
MIL-DTL-83798 may be accepted as conformance inspection data for MIL-DTL-83797, providing that
documented approval has been obtained from the qualifying activity. When conformance inspection data
specified in MIL-DTL-83796 or MIL-DTL-83798 is to be accepted as conformance inspection data
specified in MIL-DTL-83797, one hose assembly shall be considered to be the equivalent to two feet of
bulk hose.
4.6 Test conditions.
4.6.1 Temperature and pressure. Unless otherwise specified, tests shall be conducted at local
ambient temperature and barometric pressure.
4.6.2 Hose assemblies. Unless otherwise specified, hoses to be tested shall have a fitting in
accordance with MIL-DTL-83798 attached to each end. The hose assembly shall be as specified in
MIL-DTL-83796 and MIL-DTL-83796/1 through MIL-DTL-83796/18. The hose shall be inserted into the
socket to the depth of the groove on the socket. The fitting shall be attached to the hose with standard
tools. The maximum allowable gap between the socket and the nipple/elbow is .041 inch (1.04 mm) for
fitting sizes -3, -4, and -5 and .031 inch (0.79 mm) for -6 and larger.
4.6.3 Test fluids. Unless otherwise specified in the test, the test fluid shall be oil in accordance with
MIL-PRF-7808, hydraulic fluid in accordance with MIL-PRF-5606 or MIL-PRF-83282, water, or fuel
conforming to MIL-DTL-5624 or MIL-DTL-83133, as applicable.
4.6.4 Oil aging. An oil aged sample shall be produced by immersing in oil, conforming to
MIL-PRF-7808, at 250°F ± 2 °F (121°C ± 1.1°C) for 168 hours. During immersion, exclude all air from the
bore of the hose to assure all hose surfaces are in contact with the oil when immersed.
4.7 Methods of inspection.
4.7.1 Examination of products. The hose shall be examined for identification markings and
workmanship. With documented approval from the qualifying activity, statistical quality control may be
used for marking and workmanship examination. Conformance shall be as specified in 3.5.1.
4.7.1.1 Cleanliness. Both ends of the hose length shall be visually inspected to determine if caps or
plugs are installed (see 3.7.2). The caps or plugs shall then be removed and a light source shall be
placed at one end. The interior of the hose shall be visually examined, without magnification, from the
opposite end of the light source. Conformance shall be as specified in 3.7.1.
4.7.1.2 Dimensions. The internal and external diameters of the free ends of the hose shall be
checked dimensionally to determine conformance to the dimensions specified herein and on the
applicable drawing. Conformance shall be as specified in 3.5.1.2.
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