MIL-DTL-83797 Hose, Rubber, Lightweight, Medium Pressure, General Specification ForThis specification covers the general requirements for hose, rubber, lightweight, medium pressure, with operating limits of -65 to 250 Degrees F and 200 to 1000 psi suitable for aircraft fuel and oil systems within the limits specified herein.

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MIL-DTL-83797C

3.5.1.2 Dimensions. The hose internal and external diameters shall conform to the dimensions

specified herein and on the applicable drawing when examined as specified in 4.7.1.2.

3.5.2 Reduction in diameter. The hose inside diameter shall not decrease to less than 90 percent of

the minimum ID specified on figure 1 for all sizes except size 03, which shall not decrease to less than

75 percent of the ID specified on figure 1, when tested as specified in 4.7.2.

3.5.3 Field attachability. The hose assembly fittings shall not separate from the hose or show any

evidence of leakage around the fitting, when tested as specified in 4.7.3.

3.5.4 Inner tube bulge, straight coupling. The gage shall fall through the bulge at the end of the

coupling nipple of its own weight, when tested as specified in 4.7.4.

3.5.5 Proof pressure. The hose shall show no evidence of leakage or deformation, when tested as

specified in 4.7.5.

3.5.6 Elongation or contraction. The hose shall not increase in length more than 2 percent or

decrease more than 4 percent, when tested as specified in 4.7.6.

3.5.7 Bending and vacuum. A steel ball of the applicable diameter shall roll freely throughout the

entire length of the hose and there shall be no evidence of ply separation, blistering, collapse, or other

deformation, when tested as specified in 4.7.7.

3.5.8 Fuel immersion. The hose shall show no evidence of disintegration, solubility of component

parts, porosity, blistering or collapse, when tested as specified in 4.7.8.

3.5.9 Oil immersion. The hose shall show no evidence of disintegration, solubility of component

parts, porosity, blistering or collapse, when tested as specified in 4.7.9.

3.5.10 Cold temperature deflection. The hose assembly shall show no evidence of leakage or

deterioration, when tested as specified in 4.7.10.

3.5.11 Oil circulation. The hose assembly shall show no evidence of leakage or other malfunction,

when tested as specified in 4.7.11.

3.5.12 Leakage. The hose assembly shall show no evidence of leakage from the fitting, seepage

through the hose or other malfunction, when tested as specified in 4.7.12.

3.5.13 Corrosion. The hose assembly shall show no evidence of leakage, burst, or a fitting blow-off

below the minimum burst pressure specified in table I, when tested as specified in 4.7.13.

3.5.14 Burst pressure. The hose assembly shall show no leakage, burst, or a fitting blow-off below

the minimum burst pressure specified in table I, when tested as specified in 4.7.14.