MIL-DTL-5513D
4.7.11 Operation at differential temperature (see 3.4.10). Swivels when subjected to operation at
differential temperature shall meet the requirements of 3.4.10. The following details shall apply:
a. The joint shall be allowed to warm up rapidly from -65°F (-54°C) temperature to at least +40°F
(+4°C).
b. Sufficient operational check tests shall be made throughout the warm-up temperature range to
prove there is no binding or other malfunctioning due to differential rates of temperature
expansion or contraction of component parts.
c. Pressure shall be varied from 5 psig (34.5 Kpa) to rated pressure during the operational checks
and there shall be no leakage.
4.7.12 Vibration (see 3.4.11). Swivels when subjected to vibration shall meet the requirements of
3.4.11. The following details shall apply:
a. Hose cut lengths and bend radii, see table X.
b. The swivel joint shall be mounted in a fixture by the bulkhead attaching (swivel housing) end in
a fixture similar to the one shown on figure 7.
c. The opposite end of the swivel joint shall be suitably capped or plugged.
d. The applicable operating pressure as listed in table II shall be applied and maintained.
e. The mounted swivel joint shall then be vibration tested in accordance with appendix A.
f. Upon completion of the vibration tests, the swivel joint shall be subjected to the proof pressure
and leakage test specified in 4.7.3.
TABLE X. Hose cut lengths and bend radii. 1/
MIL-DTL-25579
SAE-AS604
1500 psi (10 MPa) hose
3000 psi (21 MPa) hose
Equivalent
Swivel
size
Hose
Hose
size
Radius
Radius
inches (mm)
length
length
inches (mm)
inches (mm)
inches (mm)
inches (mm)
-4
.250 (6.35)
9 (228.6)
2.000 (50.80)
11 (279.4)
3.000 (76.20)
-6
.375 (9.53)
12 (304.8)
4.000 (101.60)
14 (355.6)
5.000 (127.0)
-8
.500 (12.70)
13 (330.2)
4.625 (117.48)
15 (381.0)
5.750 (146.05)
-10
.625 (15.88)
15 (381.0)
5.500 (139.70)
16 (406.4)
6.500 (165.10)
-12
.750 (19.05)
16 (406.4)
6.500 (165.10)
18 (457.2)
7.750 (196.85)
-16
1.000 (25.40)
18 (457.2)
7.375 (187.33)
21 (533.4)
9.625 (244.48)
-20
1.250 (31.75)
23 (584.2)
11.000 (279.40)
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1/ Hose in accordance with MIL-DTL-25579 or SAE-AS604 as applicable to operating pressure.
20
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