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ASTM D2713-91(2001)

(Test Method)

Standard Test Method for Dryness of Propane (Valve Freeze Method)

Standard Test Method for Dryness of Propane (Valve Freeze Method)

SIGNIFICANCE AND USE
This test is a functional test in which the water concentration in the product is related to product behavior characteristics in a pressure-reducing system of special design to arrive at a measure of product acceptability in common use applications. Experience has demonstrated that excessive water content (dissolved water) will cause freeze-up difficulties in pressure reducing systems.
SCOPE
1.1 This test method covers the measurement of the dryness of propane-type products such as, but not limited to, commercial propane (see Specification D1835).
Note 1--This test method is not applicable to propane-type products containing antifreeze agents. However, the relative freeze times of such materials tested by this procedure may be an indication of the tendency of these products to cause freezing in pressure reducing regulators.
1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.
1.3 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

Status
Historical
Publication Date
31-Dec-2000
ICS
75.160.30 - Gaseous fuels
Technical Committee
D02 - Petroleum Products, Liquid Fuels, and Lubricants
Drafting Committee
D02.H0 - Liquefied Petroleum Gas
Current Stage
Ref Project

Relations

Replaces
ASTM D2713-91(1995)e1 - Standard Test Method for Dryness of Propane (Valve Freeze Method)
Effective Date
01-Jan-2001
Replaced By
ASTM D2713-07 - Standard Test Method for Dryness of Propane (Valve Freeze Method)
Effective Date
15-Dec-2007
Referred By
ASTM D1835-22 - Standard Specification for Liquefied Petroleum (LP) Gases
Effective Date
01-Jan-2001
Referred By
ASTM D7995-19 - Standard Test Method for Total Water in Liquid Butane by Liquefied Gas Sampler and Coulometric Karl Fischer Titration
Effective Date
01-Jan-2001

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ASTM D2713-91(2001) - Standard Test Method for Dryness of Propane (Valve Freeze Method)ASTM D2713-91(2001) - Standard Test Method for Dryness of Propane (Valve Freeze Method)
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ASTM D2713-91(2001) - Standard Test Method for Dryness of Propane (Valve Freeze Method)
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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
An American National Standard
Designation:D2713–91(Reapproved 2001)
Designation: 395/98
Standard Test Method for
Dryness of Propane (Valve Freeze Method)
This standard is issued under the fixed designation D 2713; 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 at a measure of product acceptability in common use applica-
tions. Experience has demonstrated that excessive water con-
1.1 This test method covers the measurement of the dryness
tent (dissolved water) will cause freeze-up difficulties in
of propane-type products such as, but not limited to, commer-
pressure reducing systems.
cial propane (see Specification D 1835).
NOTE 1—This test method is not applicable to propane-type products 5. Apparatus
containing antifreeze agents. However, the relative freeze times of such
5.1 PropaneWaterTestValve —Aspeciallyconstructedand
materials tested by this procedure may be an indication of the tendency of
calibrated valve manufactured solely for this test (Note 2). The
these products to cause freezing in pressure reducing regulators.
valvehastwoopenpositions,awideopenpositionforflushing,
1.2 The values stated in SI units are to be regarded as the
and a small preset flow position for testing.
standard. The values in parentheses are for information only.
NOTE 2—The propane water test valve is a precision instrument and it
1.3 This standard does not purport to address all of the
should be so treated. It should not be dropped, strained in any way, or
safety concerns, if any, associated with its use. It is the
disassembled, except to clean the filter in accordance with the manufac-
responsibility of the user of this standard to establish appro-
turer’s instructions. Valves suspected of being defective should be
priate safety and health practices and determine the applica-
returned to the manufacturer for inspection, reconditioning or recalibra-
bility of regulatory limitations prior to use.
tion.
5.2 Stop Watch.
2. Referenced Documents
5.3 Sample Cylinder, having a minimum capacity of 11.4 L
2.1 ASTM Standards:
(3 gal).
D 1265 Practice for Sampling Liquefied Petroleum (LP)
5.4 Cloth, dry, clean.
Gases - Manual Method
D 1835 Specification for Liquefied Petroleum (LP) Gases
6. Sampling
6.1 The sensitivity of moisture test measurements to uncon-
3. Summary of Test Method
trollable sampling errors is such as to warrant conducting all
3.1 A liquid-phase sample of the product to be tested is
important tests at the propane supply source rather than on
flowed through the propane water test valve to cool the valve
samples taken from the bulk supply. Referee tests should be
body.After cooling, the test valve is partially closed to a small
conducted on the bulk supply.
preset flow rate and the time required for the valve to freeze,
6.2 If the test cannot be run by connecting the apparatus
and thus interrupt the normal flow, is recorded. The average
directly to the bulk propane supply, a sample can be taken into
observed time for several successive observations is recorded
a sample cylinder having a minimum capacity of 11.4 L. In
as the observed freeze time.
such cases, the sample shall be taken strictly in accordance
with directions given in Practice D 1265.
4. Significance and Use
4.1 This test is a functional test in which the water concen-
7. Procedure
tration in the product is related to product behavior character-
7.1 Connect (Note 3) the propane water test valve to the
istics in a pressure-reducing system of special design to arrive
liquid line of the bulk product source or to the liquid phase
connection of the sample cylinder described in 6.2, so that the
body of the valve is horizontal and the outlet opening is aimed
This test method is under the jurisdiction of ASTM Committee D02 on
vertically upward. The valve should be positioned so that the
Petroleum Products and Lubricantsand is the direct responsibility of Subcommittee
D02.Hon Liquified Petroleum Gas.
Current edition approved March 15, 1991. Published July 1991. Originally
published as D 2713 – 68 T. Last previous edition D 2713 – 86. A list of suppliers of LP-Gas freeze valves is available from ASTM as a
Annual Book of ASTM Standards, Vol 05.01. research report. Request D02–1423.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, Wes
...

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1.4 This practice includes recommendations for the location of a sample point in a line or vessel. It is the responsibility of the user to ensure that the sampling point is located so as to obtain a representative sample.  
1.5 The values stated in SI units are to be regarded as standard.  
1.5.1 Exception—Non-SI units are shown in parentheses for information only.  
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4.1 These test methods are used to determine trace amounts of volatile chlorides in butane-butene mixtures. Such information is valuable in cases where chloride is deleterious in the use of this product; also, chloride contributes to corrosion problems in processing units in instances where further processing of this material is involved.
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1.1 These test methods cover the determination of the total volatile organic chlorides in concentrations from 10 mg/kg to 100 mg/kg in butane-butene mixtures. The amperometric finish is not directly applicable in the presence of other substances that combine with silver ion or oxidize chloride ion in dilute acid solution. Bromides, sulfides, ammonia, tobacco smoke, and more than 25 μg of hydrogen peroxide in the test solution interfere in the spectrophotometric procedure.  
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This specification covers liquefied petroleum gases consisting of propane, propene (propylene), butane, and mixtures of these materials. The products are intended for use as domestic, commercial and industrial heating, and engine fuels. Care must be taken to in sampling of the liquefied gases for test results to be significant. All four types of liquefied petroleum gases covered by this specification should conform to the specified requirements for vapor pressure, volatile residue, residue matter, relative density, and corrosion.
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4.1 Vapor pressure is an important specification property of commercial propane, special duty propane, propane/butane mixtures, and commercial butane that assures adequate vaporization, safety, and compatibility with commercial appliances. Relative density, while not a specification criterion, is necessary for determination of filling densities and custody transfer. The motor octane number (MON) is useful in determining the products' suitability as a fuel for internal combustion engines.
SCOPE
1.1 This practice covers, by compositional analysis, the approximate determination of the following physical characteristics of commercial propane, special-duty propane, commercial propane/butane mixtures, and commercial butane (covered by Specification D1835): vapor pressure, relative density, and motor octane number (MON).  
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1.1.2 For calculating motor octane number, this practice is applicable only to mixtures containing 20 % or less of propene.  
1.1.3 For calculated motor octane number, this practice is based on mixtures containing only components shown in Table 1.  
1.2 The values stated in SI units are to be regarded as standard.  
1.2.1 Exceptions:  
1.2.1.1 Non-SI units in parentheses are given for information only.
1.2.1.2 Motor octane number and relative density are given in MON numbers and dimensionless units, respectively.  
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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Standard Test Method for Determination of Total Volatile Sulfur in Gaseous Hydrocarbons and Liquefied Petroleum Gases by Ultraviolet Fluorescence

SIGNIFICANCE AND USE
4.1 The sulfur content of LPG, used for fuel purposes, contributes to SOx emissions and can lead to corrosion in engine and exhaust systems. Some process catalysts used in petroleum and chemical refining can be poisoned by sulfur bearing materials in the feed stocks. This test method can be used to determine sulfur in process feeds, to measure sulfur in finished products, and can also be used for compliance determinations when acceptable to a regulatory authority.
SCOPE
1.1 This test method covers the determination of total volatile sulfur in gaseous hydrocarbons and liquefied petroleum (LP) gases. It is applicable to analysis of natural, processed, and final product materials. Precision has been determined for sulfur in gaseous hydrocarbons in the range of 1 mg/kg to 100 mg/kg and for sulfur in LP gases in the range of 1 mg/kg to 196 mg/kg (Note 1).
Note 1: An estimate of pooled limit of quantification (PLOQ), information regarding sample stability and other general information derived from the interlaboratory studies on precision can be referenced in the ASTM research reports.2,3  
1.2 This test method may not detect sulfur compounds that do not vaporize under the conditions of the test.  
1.3 This test method is applicable for total volatile sulfur determination in LP gases containing less than 0.35 % (mass/mass) halogen(s).  
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
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