Standard Specification for Glass Fiber Greige Braided Tubular Sleeving

SCOPE
1.1 This specification covers the requirements for continuous glass filament greige braided tubular sleeving and is suitable for use as electrical insulation and for structural and mechanical applications.  
1.2 This specification is intended to assist ultimate users by designating the types of these products that are typical in the industry.  
1.3 This specification shows the values in both inch-pound units and in SI units. "Inch-pound units" is the technically correct name for the customary units used in the United States. "SI" units is the technically correct name for the system of metric units known as the International System of Units. The values stated in inch-pound units are to be regarded as standard; the values in SI units are provided as information only.
1.4 The following precautionary statement pertains only to the test methods portions, Section 21 through 35 of this specification: 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.  Note 1-This specification is one of a series to provide a substitute for Military Specifications: MIL-Y-1140H Yarn, Cord, Sleeving, Cloth, and Tape-Glass MIL-C-9084C Cloth, Glass Finished for Resin Laminates

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Publication Date
09-Mar-1999
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ASTM D581-99 - Standard Specification for Glass Fiber Greige Braided Tubular Sleeving
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D 581 – 99
Standard Specification for
Glass Fiber Greige Braided Tubular Sleeving
This standard is issued under the fixed designation D 581; 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 D 1907 Test Method for Yarn Number by the Skein
Method
1.1 This specification covers the requirements for continu-
D 3773 Test Methods for Length of Woven Fabric
ous glass filament greige braided tubular sleeving and is
D 3775 Test Method for Fabric Count of Woven Fabric
suitable for use as electrical insulation and for structural and
D 4963 Test Method for Ignition Loss of Glass Strands and
mechanical applications.
Fabrics
1.2 This specification is intended to assist ultimate users by
2.2 ANSI Standard:
designating the types of these products that are typical in the
ANSI/ASQC Z1.4 Sampling Procedures for Inspection by
industry.
Attributes
1.3 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in
3. Terminology
each system may not be exact equivalents; therefore, each
3.1 Definitions:
system shall be used independently of the other. Combining
3.1.1 braid, n—a narrow tubular or flat fabric produced by
values from the two systems may result in nonconformance
intertwining a single set of yarns according to a definite pattern
with the standard.
(Maypole process).
1.4 This standard does not purport to address all of the
3.1.2 carrier, n—in braiding machinery, that part of a
safety concerns, if any, associated with its use. It is the
braiding machine that holds the package of yarn, thread, or
responsibility of the user of this standard to establish appro-
cord, and carries the yarn when the machine is operated.
priate safety and health practices and determine the applica-
3.1.3 continuous filament yarn, n—a yarn made of filaments
bility of regulatory limitations prior to use.
that extend substantially throughout the length of the yarn.
2. Referenced Documents 3.1.4 greige goods—textile fabrics that have received no
bleaching, dyeing, or finishing treatment after being produced
2.1 ASTM Standards:
by any textile process.
D 76 Specification for Tensile Testing Machines for Tex-
2 3.1.5 sleeving—braided, knitted, or woven fabric of cylin-
tiles
drical form having a width less than 100 mm (4 in.) (circum-
D 123 Terminology Relating to Textiles
ference less than 200 mm (8 in.)).
D 350 Test Methods for Flexible Treated Sleeving Used for
3.1.6 tubing—braided, knitted, or woven fabric of cylindri-
Electrical Insulation
cal form having a width of 100 mm (4 in.) or more (circum-
D 374 Test Methods for Thickness of Solid Electrical Insu-
ference of 200 mm (8 in.) or more).
lation
2 3.1.7 For definitions of other textile terms used in this
D 578 Specification for Glass Fiber Strands
specification, refer to Terminology D 123.
D 579 Specification for Greige Woven Glass Fabrics
D 1059 Test Method for Yarn Number Based on Short-
CLASSIFICATION
Length Specimens
D 1423 Test Method for Twist in Yarns by the Direct-
4. Tubing Classifications
Counting Method
4.1 Glass fiber greige braided tubular sleeving is produced
D 1776 Practice for Conditioning Textiles for Testing
in one type and two styles within that type and uses yarns
designated as directed in Specification D 578. The standard
1 type and styles are:
This specification is under the jurisdiction of ASTM Committee D-13 on
Textiles and is the direct responsibility of Subcommittee D13.18 on Glass Fiber and
Its Products.
Current edition approved March 10, 1999. Published June 1999. Originally
published as D 581 – 40 T. Last previous edition D 581 – 94. Annual Book of ASTM Standards, Vol 07.02.
2 5
Annual Book of ASTM Standards, Vol 07.01. Available from American National Standards Institute, 11 W. 42nd St., 13th
Annual Book of ASTM Standards, Vol 10.01. Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D 581
4.1.1 Type G—Glass fiber greige braided tubular sleeving. 10. Ends Per Carrier
4.1.2 Style A—Glass fiber greige braided tubular sleeving
10.1 Thenominalnumberofendspercarriershallbeagreed
having a nominal wall thickness of 0.20 mm (0.008 in.).
upon between the purchaser and the supplier. The observed
4.1.3 Style B—Glass fiber greige braided tubular sleeving
number of ends per carrier shall not exceed that specified.
having a nominal wall thickness of 0.15 mm (0.006 in.).
11. Number of Carriers
REQUIREMENTS
11.1 The nominal number of carriers shall be agreed upon
between the purchaser and the supplier. The observed number
5. Material
of carriers shall not be less than that specified.
5.1 All yarns for braided tubular sleeving shall be electrical
classification, continuous filament glass yarns, unless other-
12. Picks Per Unit Length
wise specified, have a “C” filament size designation which has
12.1 The nominal number of picks per centimetre (picks per
a filament average diameter range from 4.00 to 4.74 µm
inch) shall be agreed upon between the purchaser and the
(0.00016 to 0.000189 in.).
supplier.Theobservednumberofpicksperinchshallbewithin
5.1.1 The fiber shall be free of any free alkali metal oxides,
1 pick per centimetre (3 picks per inch) of the specified value.
such as soda or potash, and foreign particles, dirt, and other
impurities.
13. Inside Diameter
6. Yarn Number
13.1 For braided tubular sleeving listed in Table 2, the
6.1 The nominal yarn number of the yarns in the braided nominal inside diameter shall conform to the requirements of
tubular sleeving shall be agreed upon between the purchaser
Table 2. For sleeving not listed in Table 2, the nominal inside
and the supplier. The average yarn number shall fall within the diameter shall be agreed upon between the purchaser and the
interval: nominal yarn number6 10 % of the nominal yarn
supplier. The average inside diameter shall conform to the
number. requirements of Table 3 unless otherwise agreed upon between
the purchaser and the seller.
7. Strand Construction
14. Wall Thickness
7.1 The basis for specifying strand construction is given in
Specification D 578. The construction of the component
14.1 For braided tubular sleeving listed in Table 2, the
strands shall be agreed upon between the purchaser and the
nominal wall thickness shall conform to the requirements of
supplier.
Table 2. For sleeving not listed in Table 2, the nominal wall
thickness shall be agreed upon between the purchaser and the
8. Direction of Twist
supplier. The average wall thickness shall be within 0.03 mm
(0.001 in.) of the nominal value.
8.1 Unless otherwise agreed upon between the purchaser
and the supplier, the primary twist in the singles strands shall
15. Length Per Unit Mass
be “Z” twist and the final twist in the plied yarns shall be “S”
twist.
15.1 For braided tubular sleeving listed in Table 2, the
nominallengthperunitmassshallconformtotherequirements
9. Twist Level
of Table 2. For sleeving not listed in Table 2, the nominal
9.1 The nominal twist in the component strands and the
length per unit mass shall be agreed upon between the
finished yarns shall be agreed upon between the purchaser and
purchaser and the supplier. The average length per unit mass
the supplier. The tolerances for the primary twist and the final
shall be within the interval: nominal length per unit mass 6
twist shall conform to Table 1.
10 % of the nominal length per unit mass.
16. Length Per Package
TABLE 1 Twist Tolerances
16.1 Thenominallengthofbraidedtubularsleevingoneach
Tolerances
package, such as a spool or serving tube, shall be no more than
Turns per Centimetre:
108 m (120 yd) nor less than 72 m (80 yd) unless otherwise
From zero to 0.4, incl 60.1 turn per centimetre
agreed upon between the purchaser and the supplier.
Over 0.4 and up to and including 60.2 turn per centimetre
4.0
16.2 Unless otherwise agreed upon between the purchaser
Over 4 65.0 % of the specified average twist
and the supplier, no piece of braided tubular sleeving shall be
Turns per Metre:
less than 14 m (15 yd) long and there shall be no more than
From zero to 40, incl 610 turns per metre
Over 40 and up to and including 620 turns per metre
three pieces in a package.
16.3 None of the sample tubes or serving spools shall
Over 400 65.0 % of the specified average twist
Turns per Inch: contain more than the allowable pieces, and the combined
From zero to 1, incl 6 0.25 turn per inch
length of all of the sample tubes or serving spools shall not be
Over 1 and up to and including 10 60.5 turn per inch
less than the combined length of those tubes or serving spools
Over 10 6 5.0 % of the specified average twist
on the identification labels.
D 581
TABLE 2 Physical Properties of Typical Continuous Filament Glass Type G Braided Tubular Sleeving
Industry Size Inside Diameter Wall Thickness Length Per Unit Mass
Designation, in.
mm in. mm in. m/kg yd/lb
Style A:
⁄16 1.6 0.063 0.20 0.008 473 235
⁄8 3.2 0.125 0.20 0.008 225 112
⁄16 5.0 0.188 0.20 0.008 172 85
⁄4 6.3 0.250 0.20 0.008 134 66
⁄16 8.0 0.313 0.20 0.008 114 57
⁄8 10.0 0.375 0.20 0.008 93 46
⁄2 12.5 0.500 0.20 0.008 85 42
⁄8 16.0 0.625 0.20 0.008 71 35
⁄4 19.0 0.750 0.20 0.008 62 31
⁄8 22.4 0.875 0.20 0.008 58 29
1 25.0 1.000 0.20 0.008 43 21
Style B:
⁄16 1.6 0.063 0.15 0.006 763 378
⁄8 3.2 0.125 0.15 0.006 422 209
⁄16 5.0 0.188 0.15 0.006 308 153
⁄4 6.3 0.250 0.15 0.006 243 121
⁄16 8.0 0.313 0.15 0.006 183 91
⁄8 10.0 0.375 0.15 0.006 145 72
⁄2 12.5 0.500 0.15 0.006 115 57
TABLE 3 Tolerances—Inside Diameter
combined) defects per hundred units of braided tubular sleev-
Industry Size ing unless otherwise agreed upon between the purchaser and
Designation, Tolerance, mm Tolerance, in.
the supplier.
mm (in.)
1.6 ( ⁄16) +0.4−0 +0.015−0
SAMPLING AND CONDITIONING
3.2 ( ⁄8) +0.4−0 +0.015−0
5.0 ( ⁄16) +0.4−0 +0.015−0
1 19. Sampling
6.3 ( ⁄4) +0.8−0 +0.031−0
8.0 ( ⁄16) +0.8−0 +0.031−0
19.1 Lot Size—A lot is defined as a single shipment of a
10.0 ( ⁄8) +0.8−0 +0.031−0
3 single type of braided tubular sleeving.Alot may constitute all
Over 10.0 ( ⁄8) +1.6−0 +0.062−0
or part of a single customer order.
19.2 Lot Sample—Unless otherwise agreed upon, take at
random as a lot sample the number of tubes or serving spools
17. Ignition Loss
of braided tubular sleeving specified in ANSI/ASQC Z1.4 and
17.1 The organic content of greige braided tubular sleeving a single sampling plan.
shall be at least 1.0 % and no greater than 4.0 % unless 19.3 Laboratory Sample—As a laboratory sample, take the
otherwise agreed upon between the purchaser and the supplier. following samples:
19.3.1 For visual appearance and length of braided tubular
18. Visual Appearance
sleeving, the tubes or serving spools in the lot sample serve as
the laboratory sample.
18.1 The braided tubular sleeving shall be generally uni-
19.3.2 Forotherproperties,takeatrandomfromthetubesor
form in quality and condition, clean, smooth, and free of
serving spools in the lot sample the number of tubes or serving
foreign particles and defects detrimental to fabrication, appear-
spools specified in Table 5.
ance, or performance.
19.4 Test Specimens—For visual appearance and braided
18.2 The braided tubular sleeving in the laboratory sample
tubular sleeving length, the tubes or serving spools in the lot
for the visual appearance shall be examined on both sides for
sample serve as test specimens. For other properties, take
the defects listed in Table 4, and the acceptable quality levels
material from the outside of each tube or serving spool in the
(AQLs) shall be 0.65 major and 2.5 total (major and minor
laboratory sample as a source of test specimens required in the
respective test methods in this specification after first discard-
TABLE 4 Visual Examination of Braided Tubular Sleeving
ing a minimum of 1 m (1 yd) from the very outside of the tube
Classification
or serving spool.
A
Defect
Major Minor
Holes, cuts, tears X
TABLE 5 Sample Size Determination for Construction and
Spots or stains:
Physical Properties
12 mm ( ⁄2 in.) or more in length X
Less than 12 mm ( ⁄2 in.) in X Sample Size, Number
Lot Size in Units, m or yd
of Units
length
Tender or weak sections X
800 or less 2
Broken or missing yarns X
801 up to and including 22 000 3
Dirty yarns X
22 001 and over 5
A
Clearly visible at normal inspection distance of approximately1mor3ft.
D 581
20. Conditioning angles to the axis of the braided sleeving and then counting the
number of cut yarn ends observed in each weave of the braided
20.1 Condition the laboratory samples for a period of at
tubular sleeving.
least5hintheatmosphereasspecifiedinPracticeD 1776.Test
under the same conditions. Preconditioning is not required.
28. Number of Carriers
NOTE 1—Glass textiles are normally tested under either the atmosphere
28.1 Verify the number of carriers in the braided tubular
specified for textiles or for plastics depending on their end use.
sleeving for one test specimen from each of the selected tubes
TEST METHODS or serving spools in the laboratory sample. This is determined
while making ends per carrier determinations and counting the
21. Material total number of cut yarn ends observed and dividing by the
ends per carrier.
21.1 Accept the supplier certification that the material is of
the correct classification as specified in Specification D 578.
29. Picks Per Unit Length
Verify that the fiber is continuous filament, if not specified
29.1 Determine the picks per centimetre (picks per inch) of
otherwise, during testing for strand construction as directed in
the braided tubular sleeving as directed in Test Method D 3775
Section24.Determinethefreedomfromdetrimentalimpurities
using three test specimens from each of the selected tubes or
during the inspection for fabric appearances as directed in
serving spools in the laboratory sample except:
Section 35.
29.1.1 Measure the number of picks per centimetre (picks
per inch) over a 75-mm (3-in.) length after the braided tubular
22. Filament Diameter
sleeving has been placed snugly upon a mandrel having the
22.1 Determinethefilamentdiameterforthebraidedtubular
same diameter as the specified inside diameter of the sleeving.
sleeving yarns as directed in Specification D 578 by using 50
Use a standard pick counter in counting the number of picks
individual filaments from one yarn specimen from each of the
per centimetre (picks per inch). Take the average of the
...

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