FED-STD-791D
Method 352.1
September 30, 1986
EFFECT OF EVAPORATION ON FLAMMABILITY
1. SCOPE
1.1 This method is used for determining the effect of evaporation on the flammability of
a liquid petroleum product.
2. SUMMARY
2.1 It consists of checking the flammability of the liquid (by passing a sample-soaked
pipe cleaner repeatedly through a flame and noting the number of passes required for ignition),
storing the sample in an oven for the time and at the temperature required by the specification,
and rechecking flammability.
3. SAMPLE SIZE
3.1 Approximately 30 mL of liquid to be tested.
4. REFERENCES, STANDARDS, AND APPARATUS
4.1 Oscillating device (such as a windshield wiper), approximately 120 arc at 25 2
cpm.
4.2 Petri dish, approximately 9.0-cm diameter by 1.6-cm deep.
4.3 Oven, gravity-convection, capable of maintaining the specified temperature within
1C (2F).
4.4 Bunsen burner.
5. MATERIALS
5.1 CAUTION - SOME MATERIALS ARE TOXIC AND HAZARDOUS. The
materials references and standards listed in this section must be handled carefully. Federal Test
Method 10000, Material Handling Safety Precautions, is a reference which lists all toxic and
hazardous materials cited in FTMS 791. The synonyms, life hazard, flammability, handling and
storage precautions, emergency treatment and measures, and spill practices of each chemical are
explained.
5.2 Pipe Cleaners (U.S. Tobacco Co., Dill's or equal).
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