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|  MIL-T-82570A(OS)
4.5.4 Marine environment
4.5.4.1 Marine atmosphere environment test. The torpedo tube assembly
shall be exposed at dockside or on the weather deck of a ship for 60 plus or
minus 5 days. The access covers and muzzle covers shall be removed for a
period of 10 plus or minus 1 days. The assembly shall be protected from
rain or snow by an appropriate shelter that will permit free circulation of
air. At the completion of this test, there shall be no evidence of corrosion.
4.5.4.2 Alternative test for marine atmosphere. Subject the torpedo tube
assembly to the Salt Fog test of MIL-STD-81O, Method 509, using a 20 percent
salt solution. The solution shall be prepared by dissolving 20 plus or minus 2
parts by weight of salt in 80 parts by weight of distilled water. The solu-
tion shall be adjusted to and maintained at a specific gravity between 1.126
and 1.157. At the completion of this test there shall be no evidence of
corrosion.
4.5.5 During and after performance of the above environmental tests, no
damage shall occur which could affect proper operation or function of the
tube.
4.5.6 At the completion of the above environmental tests, the torpedo tube
shall meet all the quality conformance tests of 4.4.
PREPARATION FOR DELIVERY
5.
5.1 Preservation and packaging. Preservation and packaging shall be
Level A or C, as specified (see 6.2).
5.1.1 Level A
5.1.1.1 Cleaning. Unless otherwise specified, the torpedo tube, in the
nonoperating condition, shall be cleaned in accordance with Method C-1 of
MIL-P-116.
5.1.1.2 Drying, Unless otherwise specified, the torpedo tube shall be
dried in accordance with one or more of the procedures of MIL-P-116, as
appropriate.
5.1.1.3 Preservation. Immediately after cleaning and drying the torpedo
tube, the external unpainted metal surfaces which are subject to corrosion
shall be preserved by the application of preservative compound conforming
to the requirements of MIL-C-16173, Grade 2.
Not applicable.
5.1.1.4 Unit packaging.
Not applicable.
5.1.2 Level B.
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