ASTM D3934-90(1996)e1
(Test Method)Standard Test Method for Flash/No Flash Test—Equilibrium Method by a Closed-Cup Apparatus
Standard Test Method for Flash/No Flash Test—Equilibrium Method by a Closed-Cup Apparatus
SCOPE
1.1 This test method covers the determination of whether a liquid complies with the closed-cup flash point requirements in government regulations, or in specifications, or as agreed between the purchaser and the seller.
1.2 This test method is limited to a temperature range between 32 and 230°F (0 and 110°C).
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 This standard should be used to measure and describe the properties of materials, products, or assemblies in response to heat and flame under controlled laboratory conditions and should not be used to describe or appraise the fire hazard or fire risk of materials, products, or assemblies under actual fire conditions. However, results of this test may be used as elements of a fire risk assessment which takes into account all of the factors which are pertinent to an assessment of the fire hazard of a particular end use.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: D 3934 – 90 (Reapproved 1996)
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Flash/No Flash Test—Equilibrium Method by a Closed-Cup
Apparatus
This standard is issued under the fixed designation D 3934; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
e NOTE—Unit of measurement statement added editorially to the Scope Section in March 1996.
INTRODUCTION
ASTM Flash Point Test Methods D 56, D 93, D 3278, and D 3941 are specified by government
departments and agencies for determining whether liquids are flammable or combustible. These
classifications are used as the basis for regulating the handling and shipping of liquids.
ISO/TC 35, Paints and Varnishes, and ISO/TC 28, Petroleum and Related Products, have issued ISO
1516 as a common standard, applicable to paints, varnishes, petroleum, and related products. This
method is similar to ISO 1516 but uses standard ASTM cups and style and format. Test Methods
D 3278 and D 3828 operate on the equilibrium principle by using the Setaflash tester that has a
temperature-control device.
This test method does not determine the finite flash point but whether or not flashing occurs at a
single specified temperature. The latter determination is made more accurate by ensuring that the test
is carried out only when the material under test and the air/vapor mixture above it are in approximate
equilibrium at the specified temperature.
1. Scope priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
1.1 This test method covers the determination of whether a
liquid complies with the closed-cup flash point requirements in
2. Referenced Documents
government regulations, or in specifications, or as agreed
2.1 ASTM Standards:
between the purchaser and the seller.
D 56 Test Method for Flash Point by Tag Closed Tester
1.2 This test method is limited to a temperature range
D 93 Test Methods for Flash Point by Pensky-Martens
between 32 and 230°F (0 and 110°C).
Closed Tester
1.3 The values stated in inch-pound units are to be regarded
D 3278 Test Methods for Flash Point of Liquids by Small
as the standard. The values given in parentheses are for
Scale Closed-Cup Apparatus
information only.
D 3828 Test Method for Flash Point by Small Scale Closed
1.4 This standard should be used to measure and describe
Tester
the properties of materials, products, or assemblies in response
D 3941 Test Method for Flash Point by the Equilibrium
to heat and flame under controlled laboratory conditions and
Method with a Closed-Cup Apparatus
should not be used to describe or appraise the fire hazard or
E 1 Specification for ASTM Thermometers
fire risk of materials, products, or assemblies under actual fire
2.2 ISO Standard:
conditions. However, results of this test may be used as
ISO 1516 Paints, varnishes, petroleum, and related
elements of a fire risk assessment which takes into account all
products—Flash/no-flash test—Closed cup equilibrium
of the factors which are pertinent to an assessment of the fire
method
hazard of a particular end use.
1.5 This standard does not purport to address all of the
3. Terminology
safety concerns, if any, associated with its use. It is the
3.1 Definitions:
responsibility of the user of this standard to establish appro-
Annual Book of ASTM Standards, Vol 05.01.
1 3
This test method is under the jurisdiction of ASTM Committee D-1 on Paint Annual Book of ASTM Standards, Vol 06.01.
and Related Coatings, Materials, and Applications and is the direct responsibility of Annual Book of ASTM Standards, Vol 05.02.
ASTM Subcommittee D01.22 on Health and Safety. Annual Book of ASTM Standards, Vol 14.03.
Current edition approved July 27, 1990. Published November 1990. Originally Available from American National Standards Institute, 13th Floor, 11 W. 42nd
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published as D 3934 – 82. Last previous edition D 3934 – 84 . St., New York, NY 10036.
D 3934
3.1.1 flash point, n—the lowest temperature corrected to a 7. Reagents and Materials
pressure of 760 mm Hg (101.3 kPa) (1013 millibars) at which
7.1 Water or a 1 + 1 Mixture of Water and Ethylene Glycol
application of an ignition source causes the vapor of the
may be used as the bath liquid.
specimen to ignite under specified conditions of test.
8. Preparation of Sample
4. Summary of Test Method
8.1 Obtain a representative sample of the product under test
4.1 A specimen in a closed cup of standard design is heated
and keep it in an air-tight container.
in a suitable liquid bath. After the specimen has been main-
8.2 Because of the possibility of loss of volatiles, the sample
tained under equilibrium conditions for at least 10 min at the
shall receive only the minimum treatment to assure uniformity.
lowest allowable flash point temperature (within a permitted
After removal of the specimen, immediately close the sample
tolerance) of the specification or regulation, it is determined
container tightly to ensure that no volatile flammable compo-
whether the specimen does or does not flash.
nents escape from the container (otherwise a new sample may
5. Significance and Use
be necessary if further testing is required).
5.1 This test method ensures that before the flash test is run 8.3 Do not open containers unnecessarily. Do not make
the air/vapor space above the specimen has attained a satura- transfers unless the sample temperature is at least 20°F (10°C)
tion concentration of vapor by using standard closed cups below the flash point.
under equilibrium conditions. The saturation concentration of 8.4 Discard samples in leaky containers.
the vapors will be attained at some temperature between that of 8.5 Do not store samples in plastic (polyethylene, polypro-
the liquid and the cooler apparatus lid. However, this tempera- pylene, etc), since volatile material may diffuse through the
ture will be close to the temperature of the specimen after it has walls of the bottles.
been maintained at the specified temperature for at least a
9. Preparation of Apparatus
10-min period. This test method does not provide for the
determination of the actual flash point but only whether a 9.1 Support the cup and liquid bath on a level, steady table.
specimen does or does not flash at a specified temperature. Unless tests are made in a draft-free room or compartment,
surround the tester on three sides with the sh
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