MIL-PRF-24172B (SH)
24 hours at 176oF (80 oC) and 70 to 75% relative humidity, followed by
24 hours at -40oF (-40oC).
24 hours at 176oF (80 oC) in the oven.
24 hours at -40oF (-40oC).
(a) Condition the specimen, weigh and measure in accordance with 4.5.14.1 and 4.5.14.2.
(b) Expose the specimen for 24 hours on the shelf of a container maintained at 176 ± 1.8ºF (80 ± ºC) in the oven and
containing a saturated solution of sodium chloride.
(c) Remove the specimen from the container and wipe excess moisture from it with an absorbent cloth.
(d) Within 30 minutes after the completion of the operation described in 4.5.14.3 (b), expose the specimen for 24 hours in
a cold box maintained at -40 ± 3.6oF (-40 ± 2 ºC).
(e) Place the specimen in the uncharged desiccator and bring to room temperature in accordance with 4.5.14.3 (a).
(f) Wipe the specimen with the absorbent cloth and then weigh, measure dimensions and examine visually in accordance
with 4.5.14.2 and conduct a visual examination in accordance with 4.5.14.4.
(g) Within 2 hours of the completion of the operation described in 4.5.14.3 (d), expose the specimen for 24 hours in the
oven at 176 ± 1.8ºF (80 ± 1ºC).
(h) Place the specimen in the uncharged desiccator and bring to room temperature in accordance with 4.5.14.2.
(i) Within 30 minutes after the completion of the operation described in 4.5.14.3 (e), expose the specimen for 24 hours in
a cold box maintained at -40 ± 3.6oF (-40 ± 2 ºC).
(j) Place the specimen in the uncharged desiccator and bring to room temperature in accordance with 4.5.14.2.
(k) Wipe the specimen with the absorbent cloth and then weigh, measure dimensions and examine visually in accordance
with 4.5.14.2 and conduct a visual examination in accordance with 4.5.14.4.
(l) Recondition the specimen, weigh and measure dimensions in accordance with 4.5.14.1 and 4.5.14.2.
4.5.14.4 Visual examination. Noticeable quantitative changes in surfaces, outline and general appearance of the
test specimen shall be recorded after each stage of the testing procedure. These changes include color, surface
irregularities, odor and splits. Changes shall also be noted as they occur, especially those which alter the shape so that
intended dimensions are no longer significant.
4.6 Toxicity. To determine conformance with the requirements of 3.9, the insulation shall be evaluated
using the HHA process. Sufficient data to permit a HHA of the product shall be provided by the
manufacturer/distributor to the NAVENVIRHLTHCEN. To obtain current technical information requirements
specified by the NAVENVIRHLTHCEN, see 6.6.
4.7 Off-gassing. The insulation shall be tested in accordance with the Nuclear Powered Submarine
Atmosphere Control Manual, NAVSEA Technical Manual S9510-AB-ATM-010 Rev 2, by a Government approved
testing facility. The results shall be submitted to the Government for evaluation and approval for use (see 3.10 and
6.7).
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract
or order (see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor personnel,
these personnel need to contact the responsible packaging activity to ascertain packaging requirements. Packaging
requirements are maintained by the Inventory Control Point's packaging activities within the Military Service or
Defense Agency, or within the military service's system commands. Packaging data retrieval is available from the
managing Military Department's or Defense Agency's automated packaging files, CD-ROM products, or by
contacting the responsible packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not
mandatory.)
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