ASTM D1837-01
(Test Method)Standard Test Method for Volatility of Liquefied Petroleum (LP) Gases
Standard Test Method for Volatility of Liquefied Petroleum (LP) Gases
SCOPE
1.1 This test method is a measure of the relative purity of the various types of liquefied petroleum (LP) gases and helps to ensure suitable volatility performance. The test results, when properly related to vapor pressure and density of the product, can be used to indicate the presence of butane and heavier components in propane type LP-gas, and pentane and heavier components in propane-butane and butane type fuels. The presence of hydrocarbon compounds less volatile than those of which the LP-gas is primarily composed is indicated by an increase in the 95 % evaporated temperature.
1.2 When the type and concentration of higher boiling components is required, chromatographic analysis should be used.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 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.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
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Designation: D 1837 – 01 An American National Standard
Standard Test Method for
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Volatility of Liquefied Petroleum (LP) Gases
This standard is issued under the fixed designation D 1837; 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.
1. Scope 4. Significance and Use
1.1 This test method is a measure of the relative purity of 4.1 Volatility, expressed in terms of the 95 % evaporated
the various types of liquefied petroleum (LP) gases and helps temperature of the product, is a measure of the amount of least
to ensure suitable volatility performance. The test results, when volatile components present in the product. Coupled with a
properly related to vapor pressure and density of the product, vapor pressure limit, it serves to ensure essentially single-
can be used to indicate the presence of butane and heavier component products in the cases of commercial grades of
components in propane type LP-gas, and pentane and heavier propane and butane. When volatility is coupled with a vapor
components in propane-butane and butane type fuels. The pressure limit which has been related to density, as in the case
presence of hydrocarbon compounds less volatile than those of of the commercial PB-mixture, the combination serves to
which the LP-gas is primarily composed is indicated by an assure essentially two component mixtures for such fuels.
increase in the 95 % evaporated temperature. When coupled with a proper vapor pressure limit, this mea-
1.2 When the type and concentration of higher boiling surement serves to assure that special-duty propane products
components is required, chromatographic analysis should be will be composed chiefly of propane and propylene and that
used. propane will be the major constituent.
1.3 The values stated in SI units are to be regarded as the
5. Apparatus
standard. The values given in parentheses are for information
only. 5.1 Weathering Tube—A centrifuge tube, cone-shaped, con-
forming to the dimensions given in Fig. 1 and made of
1.4 This standard does not purport to address all of the
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safety concerns, if any, associated with its use. It is the thoroughly annealed heat-resistant glass. The shape of the
lower tip of the tube is especially important. The taper shall be
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- uniform and the bottom shall be rounded as shown in Fig. 1.
The tubes shall comply in wall thickness to ASTM centrifuge
bility of regulatory limitations prior to use.
tube requirements (Note 1). The graduation tolerances are
2. Referenced Documents
given in Table 1.
2.1 ASTM Standards:
NOTE 1—Requirements for centrifuge tubes appear in Test Methods
D 96 Test Methods for Water and Sediment in Crude Oil by
D 96 and D 1796.
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Centrifuge Method (Field Procedure)
5.2 Tube Support—Means shall be provided for supporting
D 1796 Test Method for Water and Sediment in Fuel Oils by
the weathering tube by its neck in a vertical position.
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the Centrifuge Method (Laboratory Procedure)
5.3 Water Bath (for use in tests on butane and propane-
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E 1 Specification for ASTM Thermometers
butane mixture types of liquefied petroleum gas only). A
shallow container filled with clean water having a maintained
3. Summary of Test Method
temperature ranging from 15 to 21°C (60 to 70°F) and a depth
3.1 Refrigerate the sample by means of a cooling coil and
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of 38 mm (1 ⁄2 in.).
collect 100 mL of liquid in a weathering tube. Allow to
5.4 Thermometer—ASTM Armored Weathering Test Ther-
evaporate (“weather”) at ambient pressure under specified
mometer having a range from −50 to 5°C (−58 to 41°F) and
conditions that approximate a single plate distillation. Correct
conforming to the requirements for Thermometer 99C−92
the observed temperature, when 5 mL of liquid test portion
(99F−86) as prescribed in Specification E 1. Do not remove the
remains, for barometric pressure and thermometer ice point
armor from the thermometer.
error, and report as the 95 % evaporation temperature.
5.5 Sampling Precooling Equipment:
5.5.1 Cooling Vessel—Any suitable wide-mouthed metal
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This test method is under the jurisdiction of ASTM Committee D02 on
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container or Dewar flask at least 64 mm (2 ⁄2 in.) in inside
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
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D02.H on Liquified Petroleum Gas.
diameter by 292 mm (11 ⁄2 in.) deep.
Current edition approved Jan. 10, 2001. Published February 2001. Originally
published as D 1837 – 61 T. Last previous edition D 1837 – 94.
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Annual Book of ASTM Standards, Vol 05.01.
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