ASTM B987/B987M-20
(Specification)Standard Specification for Carbon Fiber Thermoset Polymer Matrix Composite Core (CFC) for use in Overhead Electrical Conductors
Standard Specification for Carbon Fiber Thermoset Polymer Matrix Composite Core (CFC) for use in Overhead Electrical Conductors
ABSTRACT
This specification covers carbon fiber composite core/thermoset (CFCC/TS) matrix for use in reinforcing or supporting overhead electrical conductors. It provides requirements for CFCC/TS materials and manufacture, including tensile strength, glass transition temperature, and minimum bending diameter. This specification also applies to classes of CFCC/TS, test classifications and number of tests and retests, actual density of the CFCC/TS, minimum thickness of the galvanic protection barrier layer, joints, workmanship, finish and appearance, inspection, certification, and packaging and package material. The tests covered by this specification are: tensile test and glass transition temperature test, bending test, dye penetrant testing after bending test, tensile test after bending test, heat exposure test, and heat/stress test.
SCOPE
1.1 This specification covers carbon fiber reinforced thermoset matrix composite core strength members for use in reinforcing or supporting overhead electrical conductors.
1.2 This specification covers carbon fiber core diameters from 0.180 to 0.500 in. [4.57 to 12.7 mm], inclusive.
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 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.
General Information
Relations
Buy Standard
Standards Content (Sample)
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:B987/B987M −20
Standard Specification for
Carbon Fiber Thermoset Polymer Matrix Composite Core
1
(CFC) for use in Overhead Electrical Conductors
This standard is issued under the fixed designation B987/B987M; 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 D3916 Test Method for Tensile Properties of Pultruded
Glass-Fiber-Reinforced Plastic Rod
1.1 This specification covers carbon fiber reinforced ther-
D5117 Test Method for Dye Penetration of Solid Fiberglass
moset matrix composite core strength members for use in
Reinforced Pultruded Stock
reinforcing or supporting overhead electrical conductors.
D5423 Specification for Forced-Convection Laboratory Ov-
1.2 This specification covers carbon fiber core diameters
ens for Evaluation of Electrical Insulation
from 0.180 to 0.500 in. [4.57 to 12.7 mm], inclusive.
D7028 TestMethodforGlassTransitionTemperature(DMA
Tg) of Polymer Matrix Composites by Dynamic Mechani-
1.3 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in cal Analysis (DMA)
E29 Practice for Using Significant Digits in Test Data to
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining Determine Conformance with Specifications
values from the two systems may result in non-conformance
3. Terminology
with the standard.
3.1 Definitions of Terms Specific to This Standard:
1.4 This standard does not purport to address all of the
3.1.1 CFC (carbon fiber composite core/thermoset matrix),
safety concerns, if any, associated with its use. It is the
n—consisting of continuous carbon fiber tows held together by
responsibility of the user of this standard to establish appro-
a polymer matrix where the polymer is specifically a thermo-
priate safety, health, and environmental practices and deter-
setting polymer. The carbon fiber composite core is protected
mine the applicability of regulatory limitations prior to use.
with a galvanic protection barrier layer.
1.5 This international standard was developed in accor-
3.1.2 core, n—see CFC.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the 3.1.3 design validation tests, n—the purpose of these tests is
Development of International Standards, Guides and Recom- to verify the suitability of the CFC design, materials, and
mendations issued by the World Trade Organization Technical method of manufacturing to meet the requirements in this
Barriers to Trade (TBT) Committee. specification. To ensure compliance with this specification,
these tests shall be performed on composite core samples at the
2. Referenced Documents
time of manufacture and be repeated whenever the design,
manufacturing method or the materials have changed. The
2.1 The following documents of the issue in effect on date
results of design validation tests are to be recorded and are
of material purchase form a part of this specification to the
considered valid for the whole class of CFC.
extent referenced herein.
2 3.1.4 DMA (dynamic mechanical analyzer), n—a device
2.2 ASTM Standards:
that measures the T of a polymer matrix or composite by
g
D792 Test Methods for Density and Specific Gravity (Rela-
subjecting the sample to an oscillating stress while heating the
tive Density) of Plastics by Displacement
specimen at a given heating rate.
3.1.5 galvanic protection barrier layer, n—anon-conductive
1
layer that prevents the carbon fiber of the composite core from
This specification is under the jurisdiction of ASTM Committee B01 on
Electrical Conductors and is the direct responsibility of Subcommittee B01.07 on
making contact with the aluminum strands used in the conduc-
Conductors of Light Metals.
tor.
Current edition approved Aug. 1, 2020. Published August 2020. Originally
ɛ1
3.1.6 glass transition temperature (T ), n—a temperature
approved in 2014. Last previous edition approved in 2017 as B987/B987M – 17 .
g
DOI: 10.1520/B0987_B0987M-20.
where the polymer matrix properties transition from a hard,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
glassystatetoarubberystate.Thistemperatureisdefinedtobe
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
the temperature at which a curve defined by plotting loss
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website
...
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.
´1
Designation: B987/B987M − 17 B987/B987M − 20
Standard Specification for
Carbon Fiber Thermoset Polymer Matrix Composite Core
1
(CFC) for use in Overhead Electrical Conductors
This standard is issued under the fixed designation B987/B987M; 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
ε NOTE—Table 2 was corrected editorially in November 2017.
1. Scope
1.1 This specification covers carbon fiber reinforced thermoset matrix composite core strength members for use in reinforcing
or supporting overhead electrical conductors.
1.2 This specification covers carbon fiber core diameters from 0.180 to 0.500 in. [4.57 to 12.7 mm], inclusive.
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the 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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.5 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.
2. Referenced Documents
2.1 The following documents of the issue in effect on date of material purchase form a part of this specification to the extent
referenced herein.
2
2.2 ASTM Standards:
D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
D3916 Test Method for Tensile Properties of Pultruded Glass-Fiber-Reinforced Plastic Rod
D5117 Test Method for Dye Penetration of Solid Fiberglass Reinforced Pultruded Stock
D5423 Specification for Forced-Convection Laboratory Ovens for Evaluation of Electrical Insulation
D7028 Test Method for Glass Transition Temperature (DMA Tg) of Polymer Matrix Composites by Dynamic Mechanical
Analysis (DMA)
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 CFC (carbon fiber composite core/thermoset matrix), n—consisting of continuous carbon fiber tows held together by a
polymer matrix where the polymer is specifically a thermosetting polymer. The carbon fiber composite core is protected with a
galvanic protection barrier layer.
3.1.2 core, n—see CFC.
1
This specification is under the jurisdiction of ASTM Committee B01 on Electrical Conductors and is the direct responsibility of Subcommittee B01.07 on Conductors
of Light Metals.
Current edition approved Feb. 1, 2017Aug. 1, 2020. Published March 2017August 2020. Originally approved in 2014. Last previous edition approved in 20142017 as
ɛ1
B987/B987MB987/B987M – 17 – 14. DOI: 10.1520/B0987/B0987M-17E01. DOI: 10.1520/B0987_B0987M-20.
2
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 ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
B987/B987M − 20
3.1.3 design validation tests, n—the purpose of these tests is to verify the suitability of the CFC design, materials, and method
of manufacturing to meet the requirements in this specification. To ensure compliance with this specification, these tests shall be
performed on composite core samples at the time of manufacture and be repeated whenever the design, manufacturing method or
the materials have changed. The results of design validation tests are to be recorded and are considered valid for the whole class
of CFC.
3.1.4 DMA (dynamic mechanical analyzer), n—a device that measures the T of a polymer matrix or composite by subjecting
g
the sample to an oscillating stress while heating
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.