8/20/2019 Significance and Use
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Significance and Use
5.1 The flash point temperature is one measure of the tendency
of the test specimen toform a flammable mixture with air under
controlled laboratory conditions. It is only one of a number
of properties which must be considered in assessing the overall
flammabilityhazard of a material.
5. !lash point is used in shipping and safety regulations
todefine flammable and combustible materials. "ne should consult
the particularregulation involved for precise definitions of these
classifications.
#"T$ %&The U.S. 'epartment of Transportation ('"T)
* and U.S. 'epartment of +abor("S,-) have established that
liuids with a flash point under %/.02 (133!) (see #ote1) are
flammable4 as determined by these test methods4 for those liuids
which have ainematic viscosity of 5.0 mm 6s (cSt) or more at %/.02
or 7.5 mm 6s (cSt) or more at52 (//!)4 or that contain suspended
solids4 or have a tendency to form a surface filmwhile under test.
"ther classification flash points have been established by
thesedepartments for liuids using these test methods.5.% These test
methods should be used to measure and describe the properties
ofmaterials4 products4 or assemblies in response to heat and an
ignition source undercontrolled laboratory conditions and should
not be used to describe or appraise the firehazard or fire ris of
materials4 products4 or assemblies under actual fire
conditions.,owever4 results of these test methods may be used as
elements of a fire risassessment which taes into account all of the
factors which are pertinent to anassessment of the fire hazard of a
particular end use.
5.* These test methods provide the only closed cup flash point
test procedures fortemperatures up to %/32 (870!).
1. Scope1.1 These test methods cover the determination of the
flash point of petroleum productsin the temperature range from *3
to %/32 by a manual 9ensy:;artens closed:cupapparatus or an
automated 9ensy:;artens closed:cup apparatus4 and thedetermination
of the flash point of biodiesel in the temperature range of 83 to
1732 byan automated 9ensy:;artens closed cup apparatus.
#"T$ 1&!lash point determinations above 532 can be
performed4 however4 theprecision has not been determined above this
temperature. !or residual fuels4 precisionhas not been determined
for flash points above 1332. The precision of in:uselubricating
oils has not been determined. Some specifications state a '7%
minimum
flash point below *324 however4 the precision has not been
determined below thistemperature.1. 9rocedure - is applicable to
distillate fuels (diesel4 biodiesel blends4 erosine4heating oil4
turbine fuels)4 new and in:use lubricating oils4 and other
homogeneouspetroleum liuids not included in the scope of 9rocedure
< or 9rocedure 2.
1.% 9rocedure < is applicable to residual fuel oils4 cutbac
residua4 used lubricating oils4mixtures of petroleum liuids with
solids4 petroleum liuids that tend to form a surface
