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|  MIL-T-6396E
For orders of 50 to 100
b.
(1) sample 10 tanks completely at random out of the first lot of 25
(2) one at random out of each additional lot of 15
For orders of less than 50
c.
(1) sample 10 tanks completely at random (for orders of 10 tanks or less,
all tanks shall be tested)
The contract or
4.4.2.3 Dissection test (types II and III tanks only).
purchase order shall specify whether the dissection test is to be a periodic
sampling test or a contingency option.
The dissection test will normally
4.4.2.3.1 Dissection test (sampling plan)
be designated as a mandatory sampling test for tanks incorporating newly
developed materials or manufacturing processes. For this test, tanks selected
at random and at a frequency specified in the contract or purchase order shall
be dissected in accordance with figure 1 and subjected to the dissection test
of 4.6.3.
During tank acquisitions
4.4.2.3.2 Dissection test (coningency option).
in which the dissection test is not required as part of a periodic sampling
plan, the contractor or acquisition activity may invoke a dissection test as a
contingency option in the event that other acceptance tests, or service uses
disclose chronic deficiencies in materials or manufacturing processes (see
4.4.2.4), or when questions regarding the acceptability of tanks cannot be
resolved by non-destructive tests. Tanks to be dissected shall be selected by
the contractor or acquisition activity, dissected as shown in figure 1, and
tested as required in 4.6.3.
4.4.2.4 Rejection and retest. When a defective sample unit occurs, acceptance
of all units after the last group of accepted units shall be withheld until the
extent and cause of failure have been determined and appropriately corrected.
Sampling shall then return to highest rate applicable. In the event that
chronic deficiencies are disclosed, the contingency option of 4.4.2.3.2 may be
invoked to assist in resolution of the problems.
4.5 General test conditions
Unless otherwise specified by the acquisition
activity, the following general test conditions, in addition to the test
conditions specified in the particular tests, shall apply during the tests
performed in accordance with this specification.
4.5.1 Test fluids. Except when water is specified, the following test fluids,
as specified, shall be used in testing the different kinds of tanks:
a. Fuel tank:
Unless otherwise specified, test fluid conforming to TT-S-735,
type III.
b. Oil tank: Unless otherwise specified, oil conforming to MIL-L-22851,
MIL-L-23699 or MIL-L-7808, whichever is applicable.
c. Water-alcohol tank: A mixture of 50 percent water and 50 percent alcohol,
by volume, conforming to O-E-760, unless otherwise specified.
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