ASTM D6970-03
(Practice)Standard Practice for Collection of Calcined Petroleum Coke Samples for Analysis
Standard Practice for Collection of Calcined Petroleum Coke Samples for Analysis
SIGNIFICANCE AND USE
Data obtained from calcined petroleum coke samples are used in commercial transactions, controlling plant operations, and allocating production costs. Use of standard sampling procedures facilitates the task of obtaining a sample to represent an entire lot of calcined petroleum coke.
This practice gives general procedures for the collection of calcined petroleum coke samples and is intended to provide useful methodology for the collection of a sample to represent a lot of calcined petroleum coke. The variety of calcined petroleum coke handling facilities and sampling applications preclude the publication of detailed procedures for every sampling situation.
SCOPE
1.1 This practice covers procedures for the collection of calcined petroleum coke samples from conveyor belts or transfer points. These samples may be used for physical and chemical analyses.
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.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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An American National Standard
Designation:D6970–03
Standard Practice for
Collection of Calcined Petroleum Coke Samples for
Analysis
This standard is issued under the fixed designation D 6970; 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 3.1.2 analysis sample—the reduced and divided representa-
tive portion of the bulk sample, prepared for use in the
1.1 This practice covers procedures for the collection of
laboratory.
calcined petroleum coke samples from conveyor belts or
3.1.3 gross sample—a sample representing one lot of petro-
transfer points. These samples may be used for physical and
leum coke and composed of a number of increments on which
chemical analyses.
no reduction or division has been performed.
1.2 This standard does not purport to address all of the
3.1.4 increment—a small portion of a lot collected by one
safety concerns, if any, associated with its use. It is the
operation of a sampling device and normally combined with
responsibility of the user of this standard to establish appro-
other increments from the lot to make a gross sample.
priate safety and health practices and determine the applica-
3.1.5 lot—a quantity of coke represented by a gross sample.
bility of regulatory limitations prior to use.
3.1.6 representative sample—a sample collected in such a
2. Referenced Documents manner that the size consist is the same as the lot.
3.1.7 sample—a quantity of petroleum coke taken from a
2.1 ASTM Standards:
larger quantity for the purpose of estimating properties or
D 4702 Guide for Inspecting Crosscut, Sweep-Arm, and
composition of the larger quantity.
Auger Mechanical Coal Sampling Systems for Conform-
3.1.8 sample preparation—the process that may include
ance with Current ASTM Standards
drying, crushing, division, and mixing of a gross sample for the
D 5709 Test Method of Sieve Analysis of Petroleum Coke
purpose of obtaining an unbiased analysis sample.
3. Terminology
3.1.9 size consist—the particle size distribution of a mate-
rial; for example, petroleum coke.
3.1 Definitions of Terms Specific to This Standard:
3.1.10 top size—the size of the smallest opening of one
3.1.1 accuracy—generally, a term used to indicate the
sieve of a series upon which is cumulatively retained a total of
reliability of a sample, a measurement, or an observation.
less than 5 % of the sample. This defined top size is not to be
Specifically, a measure of closeness of agreement between an
confused with the size of the largest particle in a lot.
experimental result and the true value.
3.1.1.1 Discussion—Example: the observed and true sulfur
4. Significance and Use
content of a calcined petroleum coke consignment. This
4.1 Data obtained from calcined petroleum coke samples
measure is affected by chance errors as well as by bias.
are used in commercial transactions, controlling plant opera-
tions, and allocating production costs. Use of standard sam-
This practice is under the jurisdiction of ASTM Committee D02 on Petroleum
pling procedures facilitates the task of obtaining a sample to
Products and Lubricants and is the direct responsibility of Subcommittee D02.05 on
represent an entire lot of calcined petroleum coke.
Properties of Fuels, Petroleum Coke and Carbon Material.
Current edition approved Nov. 1, 2003. Published December 2003. 4.2 This practice gives general procedures for the collection
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
of calcined petroleum coke samples and is intended to provide
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
useful methodology for the collection of a sample to represent
Standards volume information, refer to the standard’s Document Summary page on
a lot of calcined petroleum coke. The variety of calcined
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D6970–03
petroleum coke handling facilities and sampling applications 5.5.1 Collect a gross sample for each 2000 metric tons or
preclude the publication of detailed procedures for every fraction thereof, or in case of larger tonnage, as may be
sampling situation. mutually agreed upon by all involved parties. Practical expe-
rience, however, indicates the maximum size of a lot of
5. Organization of Sampling Operation
calcined petroleum coke to be represented by one gross sample
shall not exceed 15 000 metric tons (see Table 1). Separate
5.1 Place of Sampling:
samples shall be taken from each lot of calcined petroleum
5.1.1 Sample calcined petroleum coke while it is being
coke arising from a different source or known to be of different
loaded into or unloaded from railcars, ships, barges, or trucks,
quality or size.
or when discharged from kilns, supply bins, grab buckets, belt
5.6 Distribution of Increments:
conveyors, or other conveying equipment. The sample should
5.6.1 It is essential that the increments be distributed
be collected as close to the point of interest as possible.
throughout the lot to be sampled. This distribution is related to
5.1.2 Samples collected from the stationary surface of
the entire volume of the lot, not merely its surface or any linear
calcined petroleum coke in stockpiles, bins, railcars, trucks,
direction through it or over it. If circumstances prevent the
ships, or barges may be unreliable because of size segregation
sampler from applying this principle, then the lot is sampled
and shall not be used for determining conformance to specifi-
only in part, and the gross sample is representative only of this
cations unless the purchaser and the seller agree. If it is
part.Thespacingofincrementsshallbevariedifthepossibility
necessary to collect a stationary sample of calcined petroleum
exists that increment collection may get in phase with the
coke, use a sampling method mutually acceptable to all
sequence of calcined petroleum coke variability. Example:
involved parties.
routinesamplingwhereincrementcollectionfromacontinuous
5.2 Collection of Gross Sample:
stream (conveyor belt), and where increment collection is
5.2.1 Collect increments systematically, and with such fre-
automatic and its sequence coincides with the highs or lows in
quency to produce a representative sample mutually acceptable
the content of fines.
to all involved parties.
5.2.2 It is recommended the gross sample contain at least
6. Sampling Requirements
the required minimum number of increments as outlined in
6.1 Dimensions of Sampling Device—The opening of the
Table 1.
sampling device shall be at least three times the top-size of the
5.2.3 The quantity of sample to be taken assumes that the
calcined petroleum coke. For practical reasons, however, it is
top size of the coke is 25 mm (1 in.) or less.
recommended that the opening of any sampling device be not
5.3 Four Conditions of Increment Collection are Recog-
less than 32 mm (1 ⁄4 in.), regardless of the top size of the
nized:
calcined petroleum coke. The sampling device shall be of
5.3.1 Condition A (stopped-belt cut), in which a loaded
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