MIL-DTL-17505 Hose And Hose Assembly, Rubber, Oil And Gasoline, Suction And DischargeThis specification covers smooth-bore hose and hose assemblies for suction and discharge service in the transfer of fuels, such as Navy special fuel oil, diesel fuel, oil, jet fuel \(JP-5 or JP-8\), motor gasoline, and aviation gasoline. The hose is intended to handle petroleum products having an aromatic content no greater than 30 percent. The maximum working pressure of this hose is 150 pound-force per square inch \(psi\) \(1 034 kilopascal \(kPa\)\).

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MIL-DTL-17505F

3.8 Hydrostatic pressure requirements.

3.8.1 Hydrostatic proof pressure. Each hose shall be tested as described in 4.7.5 and shall

withstand an internal pressure of 250 psi (1 724 kPa) without leakage or indication of weakness

or deterioration.

3.8.2 Stability (dimensional changes). When subjected to the 250 psi (1 724 kPa) hydrostatic

pressure test of 4.7.5, the hose shall not change in length more than 7.5 percent of the original

length. The permanent elongation shall be not greater than 2.5 percent.

3.8.3 Minimum bend test. A length of hose, when tested as specified in 4.7.6, shall not be

damaged.

3.8.4 Burst pressure. The hose shall have a burst pressure of not less than 600 psi (4 137 kPa).

The burst test shall be conducted in accordance with 4.7.7. The hose assembly shall not leak at

fittings or show any signs of slippage of the couplings before the hose fails.

3.9 Kink test. A length of hose shall be subjected to the test described in 4.7.8 and shall not kink

or flatten under this test at no internal pressure.

3.10 Electrical conductivity. A low-resistance connection shall be provided by bonding the

nipples to the built-in hose reinforcing wire or wires. The wire shall be so applied that the

bonding will not be broken by flexing of the hose in service, and will ensure elimination of static

at all times.

3.11 Physical properties of tube and cover.

3.11.1 Tube and cover before aging or immersion. Prior to subjection to the immersion and

aging tests specified in 4.7.10 and 4.7.12, the tensile strength of the tube shall be not less than

1,250 psi (8 618 kPa). The tensile strength of the cover shall be 1,800 psi (12 411 kPa) when

tested as specified in 4.7.9. The ultimate elongation of the tube and cover of the hose shall be not

less than 250 percent for the tube and 300 percent for the cover when tested in accordance with

4.7.9.

3.11.2 Tube and cover after immersion. After subjection to the immersion test specified in

4.7.10, the tensile strength of the tube and cover shall be not less than 40 percent of the original

tensile strength or 600 psi (4 137 kPa) (whichever is greater). Elongation shall be not less than

150 percent.

3.11.3 Tube and cover after accelerated aging of compounds. After aging as specified in 4.7.12,

the tensile strength of the tube and cover shall be not less than 80 percent of the original tensile

strength. After aging as specified in 4.7.12, the ultimate elongation of the tube and cover shall be

not less than 50 percent of the original ultimate elongation.