ASTM D1265-97
(Practice)Standard Practice for Sampling Liquefied Petroleum (LP) Gases (Manual Method)
Standard Practice for Sampling Liquefied Petroleum (LP) Gases (Manual Method)
SCOPE
1.1 This practice covers the procedures for obtaining representative samples of liquefied petroleum gases such as propane, butane, or mixtures thereof, in containers other than those used in laboratory testing apparatus. These procedures are considered adequate for obtaining representative samples for all routine tests for LP gases required by Specification D1835 except analysis by Test Method D2163. They are not intended for obtaining samples to be used for compositional analysis. A sample procedure that avoids changes in composition must be used for compositional analysis. Note 1-Practice D3700 describes a recommended method for obtaining a representative sample of a hydrocarbon fluid and the subsequent preparation of that sample for laboratory analysis.
1.2 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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An American National Standard
Designation: D 1265 – 97
Standard Practice for
Sampling Liquefied Petroleum (LP) Gases (Manual Method)
This standard is issued under the fixed designation D 1265; 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 practice covers the procedures for obtaining repre- 4.1 Samples of liquefied petroleum gases are examined by
sentative samples of liquefied petroleum gases such as pro- various test methods to determine physical and chemical
pane, butane, or mixtures thereof, in containers other than characteristics. The test results are often used for custody
those used in laboratory testing apparatus. These procedures transfer and pricing determination. It is therefore essential that
are considered adequate for obtaining representative samples the samples be representative of the product to be tested.
for all routine tests for LP gases required by Specification
5. General Information
D 1835 except analysis by Test Method D 2163. They are not
5.1 Considerable effort is required to obtain a representative
intended for obtaining samples to be used for compositional
analysis. A sample procedure that avoids changes in composi- sample, especially if the material being sampled is a mixture of
liquefied petroleum gases. The following factors must be
tion must be used for compositional analysis.
considered:
NOTE 1—Practice D 3700 describes a recommended method for obtain-
5.1.1 Obtain samples of the liquid phase only.
ing a representative sample of a hydrocarbon fluid and the subsequent
5.1.2 When it is definitely known that the material being
preparation of that sample for laboratory analysis.
sampled is composed predominantly of only one liquefied
1.2 This standard does not purport to address all of the
petroleum gas, a liquid sample may be taken from any part of
safety concerns, if any, associated with its use. It is the
the vessel.
responsibility of the user of this standard to establish appro-
5.1.3 When the material being sampled has been agitated
priate safety and health practices and determine the applica-
until uniformity is assured, a liquid sample may be taken from
bility of regulatory limitations prior to use.
any part of the vessel.
5.1.4 Because of wide variation in the construction details
2. Referenced Documents
of containers for liquefied petroleum gases, it is difficult to
2.1 ASTM Standards:
specify a uniform method for obtaining representative samples
D 1835 Specification for Liquefied Petroleum (LP) Gases
of heterogeneous mixtures. If it is not practicable to agitate a
D 2163 Test Method for Analysis of Liquefied Petroleum
mixture for homogeneity, obtain liquid samples by a procedure
(LP) Gases and Propene Concentrates by Gas Chromatog-
which has been agreed upon by the contracting parties.
raphy
5.1.5 Directions for sampling cannot be made explicit
D 3700 Practice for Containing Hydrocarbon Fluid Samples
enough to cover all cases. They must be supplemented by
Using a Floating Piston Cylinder
judgment, skill, and sampling experience. Extreme care and
good judgment are necessary to ensure samples which repre-
3. Summary of Practice
sent the general character and average condition of the mate-
3.1 A liquid sample is transferred from the source into a
rial. Because of the hazards involved, liquefied petroleum
sample container by purging the container and filling it with
gases should be sampled by, or under the supervision of,
liquid, then providing 20 % outage so that 80 % of the liquid
persons familiar with the necessary safety precautions.
volume remains.
NOTE 2—Samples to be tested for presence of corrosive compounds or
sulfur compounds should be taken in stainless steel containers equipped
This practice is under the joint jurisdiction of ASTM Committee D-2 on
with stainless steel valves; otherwise, determinations of mercaptans and
Petroleum and Petroleum Productsand is the direct responsibility of Subcommittee
hydrogen sulfide, for example, can be misleading.
D02.H on Liquefied Petroleum Gas.
Current edition approved Nov. 10, 1997. Published June 1998. Originally
5.1.6 Hydrocarbon vapors vented during sampling must be
published as D1265 – 53 T. Last previous edition D1265 – 92.
controlled to assure compliance with applicable safety and
Annual Book of ASTM Standards, Vol 05.01.
3 environmental regulations.
Annual Book of ASTM Standards, Vols 05.02.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D 1265
6. Apparatus 8.1.1 Connect valve D of the sample container to the sample
transfer line with the container in an upright position and valve
6.1 Sample Container—Use metal sample containers of a
C at the top (Fig. 2).
type that ensures maximum safety and are resistant to corrosion
8.1.2 Close valves B, C, and D. Open valve A and then
by the product being sampled. A suitable material is stainless
valves C and D. Fill sample container until liquid issues from
steel. The size of the co
...
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