ASTM D2158-05
(Test Method)Standard Test Method for Residues in Liquefied Petroleum (LP) Gases
Standard Test Method for Residues in Liquefied Petroleum (LP) Gases
SIGNIFICANCE AND USE
Control over the residue content (required by Specification D 1835) is of considerable importance in end-use applications of LPG. In liquid feed systems residues can lead to troublesome deposits and, in vapor withdrawal systems, residues that are carried over can foul regulating equipment. Those that remain will accumulate, can be corrosive, and will contaminate following product. Water, particularly if alkaline, can cause failure of regulating equipment and corrosion of metals.
SCOPE
1.1 This test method covers the determination of extraneous materials weathering above 38C that are present in liquefied petroleum gases. The extraneous materials will generally be dissolved in the LPG, but may have phase-separated in some instances.
1.2 Liquefied petroleum gases that contain certain anti-icing additives can give erroneous results by this test method.
1.3 Although this test method has been used to verify cleanliness and lack of heavy contaminants in propane for many years, it might not be sensitive enough to protect some equipment from operational problems or increased maintenance. A more sensitive test, able to detect lower levels of dissolved contaminants, could be required for some applications.
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.
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Designation: D2158 – 05
Designation: 317/95
Standard Test Method for
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Residues in Liquefied Petroleum (LP) Gases
This standard is issued under the fixed designation D2158; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
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1. Scope* IP Appendix A
1.1 Thistestmethodcoversthedeterminationofextraneous
3. Terminology
materials weathering above 38°C that are present in liquefied
3.1 Definitions of Terms Specific to This Standard:
petroleum gases. The extraneous materials will generally be
3.1.1 oil stain observation, n—the volume of solvent-
dissolved in the LPG, but may have phase-separated in some
residue mixture required to yield an oil stain or ring that
instances.
persists for 2 minutes under specified conditions on absorbent
1.2 Liquefiedpetroleumgasesthatcontaincertainanti-icing
paper.
additives can give erroneous results by this test method.
3.1.2 residue, n—the volume, measured to the nearest 0.05
1.3 Although this test method has been used to verify
mL, of the residual material boiling above 38°C resulting from
cleanliness and lack of heavy contaminants in propane for
the evaporation of 100 mL of sample under the specified
many years, it might not be sensitive enough to protect some
conditions of this test method.
equipment from operational problems or increased mainte-
3.1.3 solvent-residue mixture, n—a mixture (solution) of 10
nance. A more sensitive test, able to detect lower levels of
mL of solvent with any residue remaining in the centrifuge
dissolved contaminants, could be required for some applica-
tube at the conclusion of the first step in this test method.
tions.
1.4 This standard does not purport to address all of the
4. Summary of Test Method
safety concerns, if any, associated with its use. It is the
4.1 A 100-mL sample of liquefied petroleum gas is weath-
responsibility of the user of this standard to establish appro-
ered in a 100-mL centrifuge tube. The volume of residue
priate safety and health practices and determine the applica-
remaining after heating the tube to 38°C is measured and
bility of regulatory limitations prior to use.
recorded.
2. Referenced Documents 4.2 Todissolveanyresidue,10mLofsolventisaddedtothe
2 centrifuge tube. Small, measured volumes of solvent-residue
2.1 ASTM Standards:
mixture are deposited on an absorbent paper in a specified
D96 Test Methods for Water and Sediment in Crude Oil by
3 manner. The appearance of the absorbent paper to which the
Centrifuge Method (Field Procedure)
residue solution has been added in measured increments is
D1796 TestMethodforWaterandSedimentinFuelOilsby
observed and recorded.
the Centrifuge Method (Laboratory Procedure)
D1835 Specification for Liquefied Petroleum (LP) Gases
5. Significance and Use
E1 Specification for ASTM Liquid-in-Glass Thermometers
5.1 Control over the residue content (required by Specifica-
2.2 Other Document:
tion D1835) is of considerable importance in end-use applica-
tions of LPG. In liquid feed systems residues can lead to
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troublesome deposits and, in vapor withdrawal systems, resi-
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee duesthatarecarriedovercanfoulregulatingequipment.Those
D02.H0 on Liquefied Petroleum Gas.
that remain will accumulate, can be corrosive, and will
Current edition approved Nov. 1, 2005. Published November 2005. Originally
contaminate following product. Water, particularly if alkaline,
approved in 1963. Last previous edition approved in 2004 as D2158–04. DOI:
can cause failure of regulating equipment and corrosion of
10.1520/D2158-05.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
metals.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
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the ASTM website. Available from Energy Institute, 61 New Cavendish St., London, WIG 7AR,
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Withdrawn. U.K. www.energyinstpubs.org.uk
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D2158 – 05
TABLE 1 Centrifuge Tube Graduation Tolerances
6. Interferences
Scale, Division, Limit of Error,
6.1 Solid contaminants such as rust, scale or dirt can
Range, mL
mL mL
interfere with this test method, which is not intended for
0.0 to 0.1 0.05 0.02
representative measurement of solid, undissolved contami-
0.1 to 0.3 0.05 0.03
nants.
0.3 to 0.5 0
...
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