ASTM D7241-13

Standard Test Method for Pile Thickness of Finished Multilevel Pile Yarn Floor Covering (Withdrawn 2022)

SIGNIFICANCE AND USE
5.1 The determination of pile thickness of multilevel pile yarn floor covering is useful in quality and cost control during manufacture of pile yarn floor covering. The appearance and performance may be affected by changes in pile thickness of pile yarn floor coverings. This test method is considered satisfactory for acceptance testing of commercial shipments because current estimates of between laboratory precision are acceptable, and this test method is commonly used in the trade for acceptance testing.  
5.2 If there are differences of practical significance between reported test results for two laboratories (or more), comparative tests should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, use the samples for such comparative tests that are as homogenous as possible, drawn from the same lot of material as the samples that resulted in disparate results during initial testing and randomly assigned in equal numbers to each laboratory. The test results from the laboratories involved should be compared using a statistical test for unpaired data, a probability level chosen prior to the testing series. If a bias is found either its cause must be found and corrected, or future test results for that material must be adjusted in consideration of the known bias.
SCOPE
1.1 This test method covers the determination of pile thickness of finished multilevel pile yarn floor covering using a thickness measuring instrument having a stationary surface (platen), a circular pressure foot under specified force, and capable of being moved vertically above the platen.  
1.2 This test method is applicable only to finished multilevel loop pile constructions.Note 1—Determination of pile thickness of multilevel pile yarn floor coverings was previously contained within Test Method D418. For user convenience, Subcommittee D13.21 subdivided Test Method D418 into separate standards of which this test method is one.  
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.4 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

• Status: Historical
• Publication Date: 30-Jun-2013
• ICS: 97.150 - Floor coverings
• Technical Committee: D13 - Textiles
• Drafting Committee: D13.21 - Pile Floor Coverings

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D7241 − 13
Standard Test Method for
Pile Thickness of Finished Multilevel Pile Yarn Floor
1
Covering
This standard is issued under the fixed designation D7241; 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. Terminology
3.1 For definitions of terms relating to Pile Floor Coverings,
1.1 This test method covers the determination of pile
refer to the Terminology D5684.
thickness of finished multilevel pile yarn floor covering using
a thickness measuring instrument having a stationary surface
3.2 Thefollowingtermsarerelevanttothisstandard:carpet,
(platen), a circular pressure foot under specified force, and
cut pile yarn floor covering, finished, finished pile yarn floor
capable of being moved vertically above the platen.
covering, floor covering, pile, pile thickness, pile yarn floor
covering, pitch, primary backing, shorn pile stubble, stubble
1.2 Thistestmethodisapplicableonlytofinishedmultilevel
height, textile floor covering, tufted fabric.
loop pile constructions.
NOTE 1—Determination of pile thickness of multilevel pile yarn floor
3.3 For definitions of other terms related to textiles, refer to
coverings was previously contained within Test Method D418. For user
Terminology D123.
convenience, Subcommittee D13.21 subdivided Test Method D418 into
separate standards of which this test method is one.
3.4 For discussion of terminology specific to this standard,
see Annex A1.
1.3 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
4. Summary of Test Method
conversions to SI units that are provided for information only
and are not considered standard.
4.1 The thickness and mass are measured on each selected
strip specimen in the unsheared condition and after removing
1.4 This standard does not purport to address all of the
approximately 25, 50, 75 % and all of the pile down to a
safety concerns, if any, associated with its use. It is the
stubble by shearing. The net pile thicknesses at the 25, 50, and
responsibility of the user of this standard to establish appro-
75 % levels are calculated by subtracting the stubble specimen
priate safety and health practices and determine the applica-
thickness from the thicknesses measured at each of the other
bility of regulatory limitations prior to use.
stages. The net pile masses are calculated by subtracting the
mass of the stubble specimen from the four other weighings.
2. Referenced Documents
The 25, 50, and 75 % net masses are expressed as a percent of
2
2.1 ASTM Standards:
thenetpilemassoftheunshearedspecimenandthe25,50,and
D123 Terminology Relating to Textiles
75 % net thicknesses are plotted against these net mass
D1776 Practice for Conditioning and Testing Textiles
percentages.Asmooth curve is drawn through the three plotted
D5684 Terminology Relating to Pile Floor Coverings
points. The net pile thickness corresponding to 50 % net mass
D5823 Test Method for Tuft Height of Pile Floor Coverings
is read from the smooth curve and doubled to obtain the
E122 Practice for Calculating Sample Size to Estimate,With
average pile thickness.
Specified Precision, the Average for a Characteristic of a
Lot or Process
5. Significance and Use
5.1 The determination of pile thickness of multilevel pile
yarn floor covering is useful in quality and cost control during
1
This test method is under the jurisdiction ofASTM Committee D13 on Textiles
manufacture of pile yarn floor covering. The appearance and
and is the direct responsibility of Subcommittee D13.21 on Pile Floor Coverings.
performance may be affected by changes in pile thickness of
Current edition approved July 1, 2013. Published September 2013. Originally
pile yarn floor coverings. This test method is considered
approved in 2006. Last previous edition approved in 2006 as D7241-06. DOI:
10.1520/D7241-13.
satisfactory for acceptance testing of commercial shipments
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
because current estimates of between laboratory precision are
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
acceptable, and this test method is commonly used in the trade
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. for acceptance testing.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D7241 − 13
5.2 If there are differences of practical significance between 7. Apparatus
reported test results for two laborato
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D7241 − 06 D7241 − 13
Standard Test Method for
Pile Thickness of Finished Multilevel Pile Yarn Floor
1
Covering
This standard is issued under the fixed designation D7241; 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
1.1 This test method covers the determination of pile thickness of finished multilevel pile yarn floor covering using a thickness
measuring instrument having a stationary surface (platen), a circular pressure foot under specified force, and capable of being
moved vertically above the platen.
1.2 This test method is applicable only to finished multilevel loop pile constructions.
NOTE 1—Determination of pile thickness of multilevel pile yarn floor coverings was previously contained within Test Method D418. For user
convenience, Subcommittee D13.21 subdivided Test Method D418 into separate standards of which this test method is one.
1.3 The values stated in SIinch-pound units are to be regarded as the standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and may be approximate.are not considered standard.
1.4 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D123 Terminology Relating to Textiles
D1776 Practice for Conditioning and Testing Textiles
D5684 Terminology Relating to Pile Floor Coverings
D5823 Test Method for Tuft Height of Pile Floor Coverings
E122 Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or
Process
3. Terminology
3.1 For definitions of terms relating to Pile Floor Coverings, refer to the Terminology D5684.
3.2 The following terms are relevant to this standard: carpet, cut pile yarn floor covering, finished, finished pile yarn floor
covering, floor covering, pile, pile thickness, pile yarn floor covering, pitch, primary backing, shorn pile stubble, stubble height,
textile floor covering, tufted fabric.
3.3 For definitions of other terms related to textiles, refer to Terminology D123.
3.4 For discussion of terminology specific to this standard, see Annex A1.
4. Summary of Test Method
4.1 The thickness and mass are measured on each selected strip specimen in the unsheared condition and after removing
approximately 25, 50, 75 % and all of the pile down to a stubble by shearing. The net pile thicknesses at the 25, 50, and 75 % levels
are calculated by subtracting the stubble specimen thickness from the thicknesses measured at each of the other stages. The net
pile masses are calculated by subtracting the mass of the stubble specimen from the four other weighings. The 25, 50, and 75 %
net masses are expressed as a percent of the net pile mass of the unsheared specimen and the 25, 50, and 75 % net thicknesses
1
This test method is under the jurisdiction of ASTM Committee D13 on Textiles and is the direct responsibility of Subcommittee D13.21 on Pile Floor Coverings.
Current edition approved Jan. 15, 2006July 1, 2013. Published March 2006September 2013. DOI: 10.1520/D7241-06.Originally approved in 2006. Last previous edition
approved in 2006 as D7241-06. DOI: 10.1520/D7241-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D7241 − 13
are plotted against these net mass percentages. A smooth curve is drawn through the three plotted points. The net pile thickness
corresponding to 50 % net mass is read from the smooth curve and doubled to obtain the average pile thickness.
5. Significance and Use
5.1 The determination of pile thickness of multilevel pile yarn floor covering is useful in quality and cost control during
manufacture of pile yarn floor covering. The appearance and performance may be affected by changes in pile thic
...