ASTM D5251-98a(2003)

Standard Practice for the Operation of the Tetrapod Walker Drum Tester

SCOPE
1.1 This practice describes the equipment and operation of the Tetrapod Walker for testing pile floor coverings with a thickness of 20 mm (0.8 in.) or less because thicker materials impede proper operation of the tumbler.
1.2 This practice is applicable for use in testing unused pile floor covering of all types. It is not applicable for use in testing used pile floor covering.
1.3 The values stated in either acceptable SI units or in other units shall be regarded separately as the standard. The values stated in each system may not be exact equivalents; therefore, each system must be used independently of the others, without combining values in any way. In case of referee decisions, the SI units shall prevail.
1.4 This practice 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 practice to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 09-Apr-2003
• ICS: 97.150 - Floor coverings
• Technical Committee: D13 - Textiles
• Drafting Committee: D13.21 - Pile Floor Coverings

Relations

• Replaces: ASTM D5251-98a - Standard Practice for the Operation of the Tetrapod Walker Drum Tester
• Effective Date: 10-Apr-2003
• Replaced By: ASTM D5251-05 - Standard Practice for the Operation of the Tetrapod Walker Drum Tester (Withdrawn 2014)
• Effective Date: 01-Mar-2005
• Referred By: ASTM D5684-19a - Standard Terminology Relating to Pile Floor Coverings
• Effective Date: 10-Apr-2003
• Referred By: ASTM D6719-22e1 - Standard Guide for Standard Test Methods and Practices for Evaluating Pile Yarn Floor Covering
• Effective Date: 10-Apr-2003
• Referred By: ASTM F1551-09(2017) - Standard Test Methods for Comprehensive Characterization of Synthetic Turf Playing Surfaces and Materials
• Effective Date: 10-Apr-2003

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D5251–98a (Reapproved 2003)
Standard Practice for
the Operation of the Tetrapod Walker Drum Tester
This standard is issued under the fixed designation D 5251; 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 casting (tetrapod) 8walks’ on the pile surface of the specimen
as it is tumbled in the drum. The drum is rotated about its
1.1 This practice describes the equipment and operation of
longitudinal axis for a specified number of revolutions.
the Tetrapod Walker for testing pile floor coverings with a
thickness of 20 mm (0.8 in.) or less because thicker materials
5. Significance and Use
impede proper operation of the tumbler.
5.1 This equipment may be used to bring about the changes
1.2 This practice is applicable for use in testing unused pile
in texture on the surface of pile floor covering caused by
floor covering of all types. It is not applicable for use in testing
mechanical action.
used pile floor covering.
1.3 ThevaluesstatedineitheracceptableSIunitsorinother
6. Apparatus, Material, and Reagent
units shall be regarded separately as the standard. The values
6.1 Tetrapod Tumbler Tester
stated in each system may not be exact equivalents; therefore,
6.1.1 Drum—Constructed of a rigid material and capped by
each system must be used independently of the others, without
a lid that is firmly secured. Each drum is equipped with two
combining values in any way. In case of referee decisions, the
springs to hold the test specimen in place during testing. The
SI units shall prevail.
inner dimensions of the drum are as follows:
1.4 This practice does not purport to address all of the
Diameter = 20565mm (8.0 6 0.2 in.)
safety concerns, if any, associated with its use. It is the
Height = 190 65mm (7.6 6 0.2 in.)
responsibility of the user of this practice to establish appro-
6.1.2 Tetrapod Walker—A metal casting, tetrahedral in
priate safety and health practices and determine the applica-
shape, with four legs placed equidistant from one another. For
bility of regulatory limitations prior to use.
example, the outermost points correspond to the points on an
2. Referenced Documents
equilateral tetrahedron and the large angle between any two
legs is 2 rad (109.5°). Each leg shall have a replaceable plastic
2.1 ASTM Standards:
foot at the end. The free standing height of the tetrapod with 3
D 123 Terminology Relating to Textiles
of the 4 plastic feet in one plane is 125 62mm(5 6 0.1 in.).
D 418 Methods of Testing Pile Yarn Floor Covering Con-
The total mass of the tetrapod including the feet is 1000 6 2.5
struction
g (2.25 6 0.21 lb). The minimum hardness of the plastic feet
D 1776 Practice for Conditioning Textiles for Testing
supplied by the manufacturer shall be 75 6 5 Type A
D 5684 Terminology Relating to Pile Floor Coverings
durometer.
3. Terminology
6.1.3 Driving System—Cradles a drum on rollers and keeps
the axis of the drum level, rotates at 5.2 6 0.2 rad/s (50 6 2
3.1 Definitions—For definitions of pile yarn floor covering
related terms used in this practice, refer to Terminology rpm) and has a counter that can be preset to stop the drum after
any number of revolutions. Drive systems that do not reverse
D 5684. For definitions of other textile terms used in this
practice, refer to Terminology D 123. shall have the direction of rotation shown on the drum.
6.2 Vacuum Cleaner, upright-type with beater bar.
4. Summary of Practice
6.3 Solvent, either ethyl alcohol (CH CH CHOH), or iso-
3 2
4.1 The specimen is secured as the lining of a rotatable propyl alcohol, [(CH ) CHOH] technical grade.
3 2
drum with the pile surface exposed. A four legged metal
ThispracticeisunderthejurisdictionofASTMCommitteeD13onTextilesand
is the direct responsibility of Subcommittee D13.21 on Pile Floor Coverings.
Current edition approved April 10, 1998. Published September 1998. Originally Suitable apparatus is available from the Wira Instrumentation, 3 Water Lane,
published as D 5251 – 92. Last previous edition D 5251 – 98. Bradford BD1 2JL, England; Law
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