MIL-DTL-26633E
4.8 Test methods.
4.8.1 Examination of the product. The hose assembly shall be visually examined to determine
compliance with the requirements specified for materials, workmanship, dimensions, design and
construction, and marking.
4.8.1.1 Hose dimension inspection. The hose shall be checked to determine compliance with the
dimension requirements specified on figure 1. A hose found to exceed the tolerance limits specified shall
be cause for rejection.
4.8.1.2 Fitting dimensions inspection. The hose assembly, with end fittings attached, shall be
checked to determine compliance with the end fitting dimension requirements specified on figure 1. A
hose assembly having end fittings outside the tolerance limits specified shall be cause for rejection.
4.8.2 Tests on PTFE inner tubes.
4.8.2.1 Density and relative density (see 3.4.1.1). When tested in accordance with SAE-AS2078 the
specific gravity of the PTFE tube shall meet the requirements of 3.4.1.1.
4.8.2.2 Tensile and Elongation (see 3.4.1.2). The inner PTFE tube when tested in accordance with
SAE-AS2078 shall meet the requirements of 3.4.1.2.
4.8.2.3 Tube rolling (see 3.4.1.3). The inner PTFE tube when tested in accordance with
SAE-AS2078, for size 04, shall meet the requirements of 3.4.1.3.
4.8.2.4 Tube proof pressure (see 3.4.1.4). The inner PTFE tube when tested in accordance with
SAE-AS2078 shall meet the requirements of 3.4.1.4. The following details shall apply:
a. PTFE tube for size 04 (proof pressure of PTFE inner tube - minimum 3000 and higher psig).
b. An alkaline wetting agent may be added to the water bath to assist in defining the leakage.
c. Minimum testing time should be one minute.
4.8.3 Hose and hose.
4.8.4 Proof pressure (see 3.4.3). All the hose assemblies shall be proof pressure tested in
accordance with SAE-AS2078 and shall meet the requirements of 3.4.3. The following details shall apply:
a. All the hose assemblies shall be subjected to 6,000 psig (413.69 bar).
b. Each hose assembly shall be tested twice.
(1) Once as a hydrostatic test.
(2) Once with gas under water.
4.8.5 Leakage (see 3.4.4). The hose assembly when tested in accordance with SAE-AS2078 shall
meet the requirements of 3.4.4.
4.8.6 Stress degradation (see 3.4.5). The hose assembly when tested in accordance with
SAE-AS2078 shall meet the requirements of 3.4.5, except hydraulic fluid may be in accordance with
MIL-PRF-87257 or MIL-PRF-83282.
4.8.7 Elongation and contraction (see 3.4.6). The hose assembly when tested in accordance with
SAE-AS2078 shall meet the requirements of 3.4.6.
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