ASTM D3333-07(2018)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D3333 − 07 (Reapproved 2018)
Standard Practice for
Sampling Manufactured Staple Fibers, Sliver, or Tow for
Testing
This standard is issued under the fixed designation D3333; 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 Scope Methods for Textiles (Withdrawn 2009)
D4849 Terminology Related to Yarns and Fibers
1.1 This practice covers a procedure for the division of
shipments of manufactured staple fiber, sliver (or top) or tow
3. Terminology
into lots and the sampling of such lots for testing.
3.1 For all terminology relating to D13.58, Yarns and
NOTE 1—For sampling yarns, refer to Practice D2258.
2 Fibers, refer to Terminology D4849.
NOTE 2—This practice differs from BISFA rules for staple fibers in the
lot sampling, by the elimination of separate sampling of outer versus inner
3.2 For all other terminology related to textiles, refer to
container areas, in the reduction of number of strata from 6 to 5, and by
Terminology D123.
the elimination of compositing to obtain a single laboratory sample for the
lot when testing properties which do not depend on as-received moisture
4. Summary of Practice
content.
1.2 This standard does not purport to address all of the
4.1 Instructions are given for dividing containers into lots,
safety concerns, if any, associated with its use. It is the for determining the number of containers to be selected from
responsibility of the user of this standard to establish appro-
each lot as the lot sample, and for determining the number of
priate safety, health, and environmental practices and deter- containers taken from the lot sample as a laboratory sample.
mine the applicability of regulatory limitations prior to use.
See Practice D4271.
1.3 This international standard was developed in accor-
4.2 Separate laboratory samples are taken for commercial
dance with internationally recognized principles on standard-
weight measurement and for other testing, for example, physi-
ization established in the Decision on Principles for the
cal or chemical tests.
Development of International Standards, Guides and Recom-
4.3 The manner of preparing laboratory sampling units for
mendations issued by the World Trade Organization Technical
commercial weight, and the manner of collecting laboratory
Barriers to Trade (TBT) Committee.
sampling units for other testing are based on the following:
4.3.1 Present knowledge of the systematic variation of
2. Referenced Documents
moisture within the container, and
2.1 ASTM Standards:
4.3.2 The variability of the properties for which the practice
D123 Terminology Relating to Textiles
is to be used.
D2258 Practice for Sampling Yarn for Testing
D4271 Practice for Writing Statements on Sampling in Test
5. Significance and Use
5.1 Assigning a value to any property of the material in a
container or in a lot, consignment, or delivery involves a
measurement process that includes both sampling and testing
ThispracticeisunderthejurisdictionofASTMCommitteeD13onTextilesand
procedures. The correctness of the value assigned depends
is the direct responsibility of Subcommittee D13.58 on Yarns and Fibers.
upon the variability due to testing. Even when the variability
Current edition approved July 1, 2018. Published August 2018. Originally
due to testing is minimized by carefully developed procedures,
approved in 1974. Last previous edition approved in 2012 as D3333 – 07(2012).
DOI: 10.1520/D3333-07R18.
correct and consistent estimates of the true value of the
BISFA Internationally Agreed Methods for Testing Polyamide Staple Fibers,
propertyarepossibleonlywhenthesamplingprocedureavoids
1974 edition, BISFA Internationally Agreed Methods for Testing Polyester Staple
systematic bias, minimizes variations due to sampling, and
Fibers, 1972 edition, and BISFA Rules for Testing Regenerated Cellulose and
Acetate Staple Fibers, 1970 edition, available from the Bureau International pour la provides a laboratory sample of adequate size.
Standardisation de la Rayonne et des Fibres Synthetiques.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D3333 − 07 (2018)
5.2 This practice may not give the most efficient sampling shipment do not have consecutive numbers, divide the ship-
plan that might be devised in special situations but it does ment into groups of containers having consecutive numbers
present a general procedure that gives satisfactory precision and treat each group as a separate lot if it is separated from the
with an economical amount of sampling and one which does adjacent group by as many as ten container numbers.
not require elaborate statistical computation based on previous
7.2 Lot Sample—As a lot sample for acceptance testing,
knowledge of the amount of variation between lot samples,
unless otherwise agreed upon, as when specified in an appli-
between laboratory samples, and between test specimens.
cable material specification, take containers which have been
5.3 The smallest number of specimens required for a given designated by drawing numbers from a recepticle in which the
variability in the average result will usually be obtained by (1) numbers have been thoroughly mixed or by use of a table of
minimizing the number of shipping units in the lot sample, (2) random numbers. As applicable, consider containers to be the
taking one of the shipping units in the laboratory sample, and primarysamplingunit.Takethenumberofcontainersspecified
(3) taking the prescribed specimen(s) from the selected labo- in Table 1.
ratory sample shipping unit. (See 7.3 and 7.4.)
7.3 Laboratory Samples for Moisture Related Properties—
5.4 To minimize the cost of sampling a lot of material, it is For acceptance testing, unless otherwise agreed upon, as when
necessary to agree on the required variance for the reported specified in an applicable material specification, proceed as
average for a lot of material: directed in 7.3.1, 7.3.2,or 7.3.3. Samples for measurement of
5.4.1 Estimate the variance due to lot samples, the variance moisture related properties cannot be used for measurement of
due to laboratory samples, and the variance due to test other properties.
specimens. 7.3.1 Staple Fiber—Immediately upon opening each con-
5.4.2 Calculate the total variance for the average test results tainer in the lot sample, prepare two laboratory samples as
for several combinations of the number of lot samples, the follows:
number of laboratory samples per lot sample, and the number 7.3.1.1 Quickly strip off fiber down to each of the layers
of test specimens per laboratory sample. illustrated in Fig. 1. As each layer is exposed, quickly collect
5.4.3 Calculate the cost of performing each of the sampling an approximately 50-g hand sample in each hand, by picking
schemes considered in 5.4.2. up small groups of fibers at points randomly distributed over
5.4.4 Select the sampling scheme that (1) has the required the entire surface of the layer. Immedia
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