MIL-DTL-83800B
4.2 Lotting. A lot shall consist of the material produced by one manufacturer in not
more than a 24-hour period under essentially the same manufacturing conditions and with no
change of the materials, providing the operation is continuous and submitted for inspections at
the same time. In the event the process is a batch operation, each shall constitute a lot.
4.3 Sampling methods.
4.3.1 Sampling. Sampling from tank cars shall be conducted in accordance with
ASTM D 4057. Sampling from smaller containers shall be conducted as follows. A random
sample shall be taken from each lot in accordance with ASQ Z1.4, inspection level S-2, with the
Acceptance Quality Limit (AQL) as specified in the contract (see 6.2). If there are fewer than
three containers in a lot, each container shall be selected. A 500 milliliter (ml) specimen shall be
removed from each container in the sample and placed in a clean, dry container. The container
shall be labeled to identify the lot and container from which it was taken.
4.3.2 Test specimens. A composite specimen shall be made with equal portions from
each specimen, and the composite specimen shall be tested as specified in 4.1.1. If there are
fewer than three specimens, each one shall be tested as specified in 4.1.1.
4.4 Test methods.
4.4.1 Color. The color of the propylene glycol shall be determined in accordance with
ASTM D 1209.
4.4.2 Specific gravity. Specific gravity shall be determined for 20 °C/20 °C in
accordance with ASTM D 891, test method B.
4.4.3 Distillation. Distillation shall be conducted on the propylene glycol in accordance
with ASTM D 1078 with the following exceptions:
a. Distillation shall be conducted at a pressure of 760 millimeters (mm) of mercury or
corrected thereto by adding 0.043 °C for each mm under 760 mm or subtracting for every mm
over 760 mm.
b. Use an ASTM partial immersion thermometer having a range of -5 °C to +300 °C.
4.4.4 Acidity. Acidity shall be determined by ASTM D 1613.
4.4.5 Moisture content. Moisture content shall be determined in accordance with
ASTM E 203 except 10 to 40 grams (gm) of sample, depending on the anticipated moisture
content, shall be used.
4.4.6 Ash residue. Ash residue shall be determined by measuring 50 ml of the sample in
a graduate and transferring to a 125 ml platinum dish which has been ignited to constant weight,
cooled in a desiccator, and tared to the nearest 0.1 milligram (mg). Record the weight of the
sample. The dish shall be heated until the vapors continue to burn after the flame is withdrawn.
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