Standard Practice for Sampling Pitch

SIGNIFICANCE AND USE
Sampling is as important as testing. If the sampling is improperly done, the sample of the material will be in error, and the analysis will not represent the true properties of the material, and it may be impossible or impracticable to take another sample; whereas, if the sample is properly taken and the analysis is in error, another analysis can readily be made of the original sample.
Samples may be taken for either of the following two purposes:
4.2.1 To represent as nearly as possible an average of the bulk of the materials sampled, or
4.2.2 To ascertain the maximum variation in characteristics which the material possesses.
A good sampling plan has the following characteristics:
4.3.1 It protects the consumer against the acceptance of a bad batch of material.
4.3.2 It protects the producer against the rejection of a good batch of material.
4.3.3 It gives long-range protection to the consumer.
4.3.4 It encourages the producer to keep his process in control.
4.3.5 It minimizes the cost of sampling, inspection of testing, and administration.
4.3.6 It provides information concerning the quality of the product.
Sampling Integrity—When one takes a sample, one is attempting to represent a batch or lot of material with that sample. Different forms of pitch, and pitch in different types of containers, need to have different sampling plans and appropriate sampling equipment. Each sampling plan should be designed so that it accomplishes its objective, which is to ascertain the characteristics or quality of a batch or lot of material.
SCOPE
1.1 This practice covers procedures for sampling pitch at points of manufacture, storage, and delivery.  
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. Specific hazard statements are given in Section 10.

General Information

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Historical
Publication Date
31-Oct-2004
Current Stage
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D4296–83 (Reapproved 2004)
Standard Practice for
1
Sampling Pitch
This standard is issued under the fixed designation D4296; 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 3.2 Samples of solid pitches are taken from loading sys-
tems, storage, and shipment containers in increments required
1.1 This practice covers procedures for sampling pitch at
to prepare a representative sample for testing.
points of manufacture, storage, and delivery.
1.2 This standard does not purport to address all of the
4. Significance and Use
safety concerns, if any, associated with its use. It is the
4.1 Sampling is as important as testing. If the sampling is
responsibility of the user of this standard to establish appro-
improperly done, the sample of the material will be in error,
priate safety and health practices and determine the applica-
and the analysis will not represent the true properties of the
bility of regulatory limitations prior to use. Specific warning
material, and it may be impossible or impracticable to take
statements are given in Section 11.
another sample; whereas, if the sample is properly taken and
2. Terminology the analysis is in error, another analysis can readily be made of
the original sample.
2.1 Definitions:
4.2 Samples may be taken for either of the following two
2.1.1 bulk sample—a large sample, either from one place or
purposes:
made up of several incremental samples of the same material.
4.2.1 To represent as nearly as possible an average of the
2.1.2 composite sample—a thoroughly mixed gross sample.
bulk of the materials sampled, or
2.1.3 gross sample—a large sample made up of several
4.2.2 To ascertain the maximum variation in characteristics
portions (increments) of a mass of material.
which the material possesses.
2.1.4 increment—a portion of a material to be combined
4.3 A good sampling plan has the following characteristics:
with other portions of the same material to provide a larger
4.3.1 It protects the consumer against the acceptance of a
sample which will represent the whole material.
bad batch of material.
2.1.5 representative sample—a part of a homogeneous ma-
4.3.2 It protects the producer against the rejection of a good
terial, or a part of the composited and mixed portions of a
batch of material.
material, which carries all the true properties and physical
4.3.3 It gives long-range protection to the consumer.
characteristics of the whole material.
4.3.4 It encourages the producer to keep his process in
2.1.6 sample—a part taken as representative of a whole
control.
material.
4.3.5 It minimizes the cost of sampling, inspection of
3. Summary of Practice testing, and administration.
4.3.6 It provides information concerning the quality of the
3.1 Samples of liquid pitches are taken from process lines,
product.
storage, and shipment containers in increments required to
4.4 Sampling Integrity—When one takes a sample, one is
prepare a representative sample for testing.
attempting to represent a batch or lot of material with that
sample. Different forms of pitch, and pitch in different types of
1
containers, need to have different sampling plans and appro-
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
priate sampling equipment. Each sampling plan should be
Properties of Fuels, Petroleum Coke and Carbon Material.
designed so that it accomplishes its objective, which is to
Current edition approved Nov. 1, 2004. Published November 2004. Originally
ascertain the characteristics or quality of a batch or lot of
approved in 1983. Last previous edition approved in 1999 as D4296 – 83 (1999).
DOI: 10.1520/D4296-83R04. material.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D4296–83 (2004)
5. Selection of Samples 9.4 Immediately after filling and sealing, the sampling
containers shall be properly marked for identification with a
5.1 Pitches shall be sampled by the producer at the point of
suitable pencil on the container itself, not on the lid.
manufacture or storage, and at such time as to allow the tests
controlling acceptance or rejection of quality, as specified by
10. Apparatus
the consumer, to be made in advance of a shipment.
10.1 Sampling Equipment for Liquid Materials:
5.2 Samples of pitches shall be taken by the consumer from
10.1.1 If so equipped, pipe lines and storage tanks may be
the shipment containers immediately upon de
...

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