ASTM D6970-03(2008)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D6970 − 03(Reapproved 2008)
Standard Practice for
Collection of Calcined Petroleum Coke Samples for
Analysis
This standard is issued under the fixed designation D6970; 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 (´) 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 The values stated in SI units are to be regarded as
3.1.4 increment—a small portion of a lot collected by one
standard. The values given in parentheses are for information
operation of a sampling device and normally combined with
only.
other increments from the lot to make a gross sample.
1.3 This standard does not purport to address all of the
3.1.5 lot—a quantity of coke represented by a gross sample.
safety concerns, if any, associated with its use. It is the
3.1.6 representative sample—a sample collected in such a
responsibility of the user of this standard to establish appro-
manner that the size consist is the same as the lot.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
3.1.7 sample—a quantity of petroleum coke taken from a
larger quantity for the purpose of estimating properties or
2. Referenced Documents
composition of the larger quantity.
2.1 ASTM Standards: 3.1.8 sample preparation—the process that may include
drying,crushing,division,andmixingofagrosssampleforthe
D4702 Practice for Quality Management of Mechanical
Coal Sampling Systems (Withdrawn 2008) purpose of obtaining an unbiased analysis sample.
D5709 Test Method for Sieve Analysis of Petroleum Coke
3.1.9 size consist—the particle size distribution of a mate-
rial; for example, petroleum coke.
3. Terminology
3.1.10 top size—the size of the smallest opening of one
3.1 Definitions of Terms Specific to This Standard:
sieve of a series upon which is cumulatively retained a total of
3.1.1 accuracy—generally, a term used to indicate the reli-
less than 5 % of the sample. This defined top size is not to be
ability of a sample, a measurement, or an observation. confused with the size of the largest particle in a lot.
Specifically, a measure of closeness of agreement between an
4. Significance and Use
experimental result and the true value.
4.1 Data obtained from calcined petroleum coke samples
3.1.1.1 Discussion—Example: the observed and true sulfur
are used in commercial transactions, controlling plant
content of a calcined petroleum coke consignment. This
operations, and allocating production costs. Use of standard
measure is affected by chance errors as well as by bias.
sampling procedures facilitates the task of obtaining a sample
to represent an entire lot of calcined petroleum coke.
1 4.2 This practice gives general procedures for the collection
This practice is under the jurisdiction of ASTM Committee D02 on Petroleum
Products and Lubricants and is the direct responsibility of Subcommittee D02.05 on of calcined petroleum coke samples and is intended to provide
Properties of Fuels, Petroleum Coke and Carbon Material.
useful methodology for the collection of a sample to represent
Current edition approved Oct. 15, 2008. Published December 2008.Originally
a lot of calcined petroleum coke. The variety of calcined
approved in 2003. Last previous edition approved in 2003 as D6970–03. DOI:
petroleum coke handling facilities and sampling applications
10.1520/D6970-03R08.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
preclude the publication of detailed procedures for every
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
sampling situation.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
5. Organization of Sampling Operation
The last approved version of this historical standard is referenced on
www.astm.org. 5.1 Place of Sampling:
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D6970 − 03 (2008)
5.1.1 Sample calcined petroleum coke while it is being shall not exceed 15 000 metric tons (see Table 1). Separate
loaded into or unloaded from railcars, ships, barges, or trucks, samples shall be taken from each lot of calcined petroleum
or when discharged from kilns, supply bins, grab buckets, belt coke arising from a different source or known to be of different
conveyors, or other conveying equipment. The sample should quality or size.
be collected as close to the point of interest as possible.
5.6 Distribution of Increments :
5.1.2 Samples collected from the stationary surface of
5.6.1 It is essential that the increments be distributed
calcined petroleum coke in stockpiles, bins, railcars, trucks,
throughout the lot to be sampled. This distribution is related to
ships, or barges may be unreliable because of size segregation
the entire volume of the lot, not merely its surface or any linear
and shall not be used for determining conformance to specifi-
direction through it or over it. If circumstances prevent the
cations unless the purchaser and the seller agree. If it is
sampler from applying this principle, then the lot is sampled
necessary to collect a stationary sample of calcined petroleum
only in part, and the gross sample is representative only of this
coke, use a sampling method mutually acceptable to all
part.Thespacingofincrementsshallbevariedifthepossibility
involved parties.
exists that increment collection may get in phase with the
5.2 Collection of Gross Sample :
sequence of calcined petroleum coke variability. Example:
5.2.1 Collect increments systematically, and with such fre-
routinesamplingwhereincrementcollectionfromacontinuous
quency to produce a representative sample mutually acceptable
stream (conveyor belt), and where increment collection is
to all involved parties.
automatic and its sequence coincides with the highs or lows in
5.2.2 It is recommended the gross sample contain at least
the content of fines.
the required minimum number of increments as outlined in
Table 1.
6. Sampling Requirements
5.2.3 The quantity of sample to be taken assumes that the
6.1 Dimensions of Sampling Device— The opening of the
top size of the coke is 25 mm (1 in.) or less.
sampling device shall be at least three times the top-size of the
5.3 Four Conditions of Increment Collection are Recog-
calcined petroleum coke. For practical reasons, however, it is
nized:
recommended that the opening of any sampling device be not
5.3.1 Condition A (stopped-belt cut) , in which a loaded 1
less than 32 mm (1 ⁄4 in.), regardless of the top size of the
conveyor belt is stopped and a full cross-section cut with
calcined petroleum coke. The sampling device shall be of
parallel sides is removed from the calcined petroleum coke
sufficient capacity to completely retain or entirely pass the
stream.Thedistancebetweentheparallelfacessh
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