ASTM D1837-94
(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
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn. Contact ASTM International (www.astm.org) for the latest information.
Designation: D 1837 – 94 An American National Standard
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
1
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 temperature of the product, is a measure of the amount of least
volatile fuel components present in the product. Coupled with
1.1 This test method is a measure of the relative purity of
a vapor pressure limit, it serves to ensure essentially single-
the various types of liquefied petroleum (LP) gases and helps
component products in the cases of commercial propane and
to ensure suitable volatility performance. The test results, when
commercial butane fuel types. When volatility is coupled with
properly related to vapor pressure and density of the product,
a vapor pressure limit which has been related to gravity, as in
can be used to indicate the presence of butane and heavier
the case of the commercial PB-mixture type of fuels, the
components in propane type LP-gas, and pentane and heavier
combination serves to assure essentially two component mix-
components in propane-butane and butane type fuels. The
tures for such fuels. When coupled with a proper vapor
presence of hydrocarbon compounds less volatile than those of
pressure limit, this measurement serves to assure that special-
which the LP-gas is primarily composed is indicated by an
duty propane products will be composed chiefly of propane and
increase in the 95 % evaporated temperature.
propylene and that propane will be the major constituent.
1.2 Chromatographic analysis should be used when the
concentration and type of higher boiling compounds must be
5. Apparatus
identified.
5.1 Weathering Tube—A centrifuge tube, cone-shaped, con-
1.3 The values stated in SI units are to be regarded as the
forming to the dimensions given in Fig. 1 and made of
standard. The values given in parentheses are for information
4
thoroughly annealed heat-resistant glass. The shape of the
only.
lower tip of the tube is especially important. The taper shall be
1.4 This standard does not purport to address all of the
uniform and the bottom shall be rounded as shown in Fig. 1.
safety concerns, if any, associated with its use. It is the
The tubes shall comply in wall thickness to ASTM centrifuge
responsibility of the user of this standard to establish appro-
tube requirements (Note 1). The graduation tolerances are
priate safety and health practices and determine the applica-
given in Table 1.
bility of regulatory limitations prior to use.
NOTE 1—Requirements for centrifuge tubes appear in Test Methods
2. Referenced Documents
D 96 and D 1796.
2.1 ASTM Standards:
5.2 Tube Support—Means shall be provided for supporting
D 96 Test Methods for Water and Sediment in Crude Oil by
2
the weathering tube by its neck in a vertical position.
Centrifuge Method (Field Procedure)
5.3 Water Bath (for use in tests on butane and propane-
D 1796 Test Method for Water and Sediment in Fuel Oils by
2
butane mixture types of liquefied petroleum gas only). A
the Centrifuge Method (Laboratory Procedure)
3
shallow container filled with clean water having a maintained
E 1 Specification for ASTM Thermometers
temperature ranging from 15 to 21°C (60 to 70°F) and a depth
3. Summary of Test Method
1
of 38 mm (1 ⁄2 in.).
3.1 The product is refrigerated by means of a cooling coil,
5.4 Thermometer—ASTM Armored Weathering Test Ther-
and 100 mL of the liquid is collected in a weathering tube. The
mometer having a range from −50 to 5°C (−58 to 41°F) and
liquid is allowed to weather under specified conditions and the
conforming to the requirements for Thermometer 99C−92
temperature is observed when 95 % has evaporated. Correction
(99F−86) as prescribed in Specification E 1.
for variation of barometric pressure is made.
5.5 Sampling Precooling Equipment:
5.5.1 Cooling Vessel—Any suitable wide-mouthed metal
4. Significance and Use
1
container or Dewar flask at least 64 mm (2 ⁄2 in.) in inside
4.1 Volatility, expressed in terms of the 95 % evaporated
1
diameter by 292 mm (11 ⁄2 in.) deep.
5.5.2 Cooling Coil—Approximately 6 m (20 ft) of 4.8-mm
1
This test method is under the jurisdiction of ASTM Committee D-2 on
3
( ⁄16-in.) outside diameter soft copper tubing, wound around a
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
1
D02.H on Liquified Petroleum Gas. hollow mandrel at least 54 mm (2 ⁄8
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.