Standard Practice for
Automatic Sampling of Petroleum and Petroleum Products1

This standard is issued under the fixed designation D 4177; 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.

This standard has been approved for use by agencies of the Department of Defense.

This practice has been approved by the sponsoring committees and accepted by the cooperating organizations in accordance with
established procedures.

1. Scope

1.1 This practice covers information for the design, installation, testing, and operation of automated equipment for the
extraction of representative samples of petroleum and petroleum products from a flowing stream and storing them in a
sample receiver. If sampling is for the precise determination of
volatility, use Practice D 5842 in conjunction with this practice. For sample mixing, refer to Practice D 5854. Petroleum
products covered in this practice are considered to be a single
phase and exhibit Newtonian characteristics at the point of
sampling.

1.2 Applicable Fluids—This practice is applicable to petroleum and petroleum products with vapor pressures at sampling
and storage temperatures less than or equal to 101 kPa (14.7
psi). Refer to D 5842 when sampling for Reid vapor pressure
(RVP) determination.

1.3 Non-applicable Fluids—Petroleum products whose vapor pressure at sampling and sample storage conditions are
above 101 kPa (14.7 psi) and liquified gases (that is, LNG,
LPG etc.) are not covered by this practice.

1.3.1 While the procedures covered by this practice will
produce a representative sample of the flowing liquid into the
sample receiver, specialized sample handling may be necessary
to maintain sample integrity of more volatile materials at high
temperatures or extended residence time in the receiver. Such
handling requirements are not within the scope of this practice.
Procedures for sampling these fluids are described in Practice
D 1265, Test Method D 1145, and GPA 2166.

1.4 Annex A2 contains theoretical calculations for selecting
the sampler location. Annex A3 lists acceptance methodologies
for sampling systems and components. Annex A4 gives performance criteria for permanent installations, while Annex A5
has the criteria for portable sampling units. Appendix X1 is a

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