ASTM D2713-91(1995)e1
(Test Method)Standard Test Method for Dryness of Propane (Valve Freeze Method)
Standard Test Method for Dryness of Propane (Valve Freeze Method)
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.
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e1
Designation: D 2713 – 91 (Reapproved 1995) An American National Standard
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.
e NOTE—Editorial changes were made throughout in December 1995.
1. Scope istics in a pressure-reducing system of special design to arrive
at a measure of product acceptability in common use applica-
1.1 This test method covers the measurement of the dryness
tions. Experience has demonstrated that excessive water con-
of propane-type products such as, but not limited to, commer-
tent (dissolved water) will cause freeze-up difficulties in
cial propane (see Specification D 1835).
pressure reducing systems.
NOTE 1—This test method is not applicable to propane-type products
containing antifreeze agents. However, the relative freeze times of such
5. Apparatus
materials tested by this procedure may be an indication of the tendency of
5.1 Propane Water Test Valve —A specially constructed and
these products to cause freezing in pressure reducing regulators.
calibrated valve manufactured solely for this test (Note 2). The
1.2 This standard does not purport to address all of the
valve has two open positions, a wide open position for flushing,
safety concerns, if any, associated with its use. It is the
and a small preset flow position for testing.
responsibility of the user of this standard to establish appro-
NOTE 2—The propane water test valve is a precision instrument and it
priate safety and health practices and determine the applica-
should be so treated. It should not be dropped, strained in any way, or
bility of regulatory limitations prior to use.
disassembled, except to clean the filter in accordance with the manufac-
1.3 The values stated in SI units are to be regarded as the
turer’s instructions. Valves suspected of being defective should be
standard. The values in parentheses are for information only.
returned to the manufacturer for inspection, reconditioning or recalibra-
tion.
2. Referenced Documents
5.2 Stop Watch.
2.1 ASTM Standards:
5.3 Sample Cylinder, having a minimum capacity of 11.4 L
D 1265 Practice for Sampling Liquefied Petroleum (LP)
(3 gal).
Gases
5.4 Cloth, dry, clean.
D 1835 Specification for Liquefied Petroleum (LP) Gases
6. Sampling
3. Summary of Test Method
6.1 The sensitivity of moisture test measurements to uncon-
3.1 A liquid-phase sample of the product to be tested is
trollable sampling errors is such as to warrant conducting all
flowed through the propane water test valve to cool the valve
important tests at the propane supply source rather than on
body. After cooling, the test valve is partially closed to a small
samples taken from the bulk supply. Referee tests should be
preset flow rate and the time required for the valve to freeze,
conducted on the bulk supply.
and thus interrupt the normal flow, is recorded. The average
6.2 If the test cannot be run by connecting the apparatus
observed time for several successive observations is recorded
directly to the bulk propane supply, a sample can be taken into
as the observed freeze time.
a sample cylinder having a minimum capacity of 11.4 L. In
such cases, the sample shall be taken strictly in accordance
4. Significance and Use
with directions given in Practice D 1265.
4.1 This test is a functional test in which the water concen-
tration in the product is related to product behavior character-
7. Procedure
7.1 Connect (Note 3) the propane water test valve to the
liquid line of the bulk product source or to the liquid phase
This test method is under the jurisdiction of ASTM Committee D-2 on
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, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
D 2713
connection of the sample cylinder described in 6.2, so that the sive freeze-off times check
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