MIL-DTL-23053/4D
Physical Properties. - Continued
TABLE II.
Characteristic
Requirement
Test procedure and condition
Dielectric strength,
Classes 1 & 2 -
volts/mil (Kv/mm),
400 (15.8)
Class 3 -
minimum
200 (7.9)
Fungus resistance 4/
No growth
4.6.2, ASTM G21
1/ Use mandrel sizes specified in footnote 3/
2/ Sealing Efficiency:
A six-inch length of sleeving shall be heated in an
oven at 200° ± 2°C (392° ± 4°F) for 3 minutes. A pair of pliers shall be
pre-conditioned in an oven at 200° ± 2°C (392° ± 4°F) for 10 minutes.
Within 5 seconds after removal from the oven, approximately .25 inch (6.35
mm) of one end of the sleeving shall be pressed together with sufficient
pressure from the pair of pliers so the surfaces are in full contact and the
pressure held for 20 to 40 seconds. Allow the sleeving to condition at room
temperature for 10 minutes.
Reheat the sleeving in a 150°C oven for 5
minutes.
Remove from the oven and allow the sleeving to condition to room
temperature for a minimum of 10 minutes.
Submerge the pressed together
portion of the sleeving 1 inch (2.5 mm) minimum in room temperature water
and pressurize the open end of the sleeving at 3 psi minimum for no less
than 5 seconds.
Any emanating air bubbles throught the pressed together
portion of the sleeving shall constitute a failure.
3/ 175° ± 2°C (347° ± 4°F) for 168 hours followed by a mandrel bend test at
room temperature. The sleeving shall be bent through 360° in 10 ± 2 seconds.
Mandrel size shall be as follows:
Nominal sleeving ID, inch (mm)
Mandrel diameter,
inch (mm)
minimum, as supplied
.125 to .250 (3.18 to 6.35)
.438 (11.1)
over .250 to .750 (6.35 to 19.1)
.50 (12.7)
over .750 (19.1)
.563 (14.3)
4/ MIL-I-23053/4 materials do not normally support fungus growth. Per-
formance of this requirement is only when specified by the acquisition
activity (see 6.2).
Storage life conditions: Supplier shall certify to storage at temperatures 18°
to 35°C (65° to 95°F) for 3 years. Conformance to 3.5. See 3.5.2 for storage
life extension.
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