MIL-DTL-8788F
3.5 Performance. The hose shall meet the following performance requirements. When necessary for
testing, the hose shall be assembled with end fittings in accordance with MIL-DTL-8789.
3.5.1 Proof pressure. The hose shall not leak or fail during or at the completion of the test, when
tested as specified in 4.7.3, with the applicable proof pressure specified in table I. There shall be no
visual evidence of damage or permanent deformation.
TABLE I. Performance characteristics.
Hose
Proof
Burst
Operating
Bend radius Assembly length
size
pressure,
pressure,
inside, min
of test samples
pressure
min
dash
min
inch (mm)
inch (mm) 1/
psi (Mpa)
number
psi (Mpa)
psi (Mpa)
3,000
8,000
16,000
3.00
-4
16 (406)
(21)
(55)
(110)
(76.20)
3,000
7,000
14,000
3.38
18 (457)
-5
(21)
(48)
(97)
(85.85)
3,000
7,000
14,000
5.00
21 (533)
-6
(21)
(48)
(97)
(127.00)
3,000
7,000
14,000
5.75
24 (610)
-8
(21)
(48)
(97)
(146.05)
3,000
6,000
12,000
6.50
-10
30 (762)
(21)
(41)
(83)
(165.10)
3,000
6,000
12,000
7.75
-12
33 (838)
(21)
(41)
(83)
(196.85)
3,000
6,000
10,000
9.63
24 (610)
-16
(21)
(41)
(69)
(244.60)
1/ Length specified includes fittings at both ends (see 3.5).
3.5.2 Diameter reduction. The ID of the hose shall not be less than 90% of the applicable diameter
3.5.3 Elongation and contraction. The length change for hose sizes 4 and 5 shall not be more than
+0.50 or -2.50%, when tested as specified in 4.7.5. Length change for hose sizes 6 and larger shall not
be more than ±2.00%.
3.5.4 Leakage. The hose and end fittings shall not show any evidence of leakage during or at the
completion of the test, when tested as specified in 4.7.6.
3.5.5 Burst pressure. There shall be no leakage in the hose or at the end fittings, when tested as
specified in 4.7.7, below and including the minimum burst pressure specified in table I. The hose shall
not burst or develop a permanent blister. The fittings shall not loosen or disconnect from the hose.
3.5.6 Impulse. The hose and end fittings shall not show any evidence of leakage, burst, or fitting
loosening or blow-off, when tested as specified in 4.7.8.
3.5.7 Bulge resistance. The ball gage, used to determine the inner tube diameter at the bulge of the hose,
shall fall freely under its own weight through the section of the end-fitting insert in the hose, when tested as
specified in 4.7.9.
3.5.8 Low temperature flexibility. The hose shall not leak or fail during or at the completion of the test,
when tested as specified in 4.7.10. There shall be no visual evidence of damage or permanent deformation.
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