ASTM F479-95
(Specification)Standard Specification for In-Service Care of Insulating Blankets
Standard Specification for In-Service Care of Insulating Blankets
SCOPE
1.1 This specification covers the in-service care, inspection, testing, and use voltage of insulating blankets for protection from electrical shock. The product requirements and acceptance testing are as shown in Specification D1048.
1.2 This standard does not purport to address all of the safety problems, 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 . See Section 6 for specific precautionary statements.
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Designation: F 479 – 95
Standard Specification for
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In-Service Care of Insulating Blankets
This standard is issued under the fixed designation F 479; 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 3.1.5 electrode—the energized or grounded conductor por-
tion of electrical test equipment which is placed near or in
1.1 This specification covers the in-service care, inspection,
contact with the material or equipment being tested (in
testing, and use voltage of insulating blankets for protection
accordance with Definitions F 819).
from electrical shock. The product requirements and accep-
3.1.6 flashover—the electrical discharge or arc occurring
tance testing are as shown in Specification D 1048.
between electrodes and over or around, but not through, the
1.2 This standard does not purport to address all of the
equipment being tested.
safety problems, if any, associated with its use. It is the
3.1.7 ozone—a very active form of oxygen that may be
responsibility of the user of this standard to establish appro-
produced by corona, arcing, or ultra-violet rays.
priate safety and health practices and determine the applica-
3.1.8 ozone cutting and checking—the cracks produced by
bility of regulatory limitations prior to use. See Section 6 for
ozone in a material under mechanical stress.
specific precautionary statements.
3.1.9 retest—the tests given after the initial acceptance test
2. Referenced Documents usually performed at regular periodic intervals or as required
because of physical inspection.
2.1 ASTM Standards:
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3.1.10 unassigned blankets—blankets that are in storage
D 1048 Specification for Rubber Insulating Blankets
prior to being issued for use.
D 2865 Practice for Calibration of Standards and Equip-
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3.1.11 voltage, maximum use—the a-c voltage (rms), clas-
ment for Electrical Insulating Materials Testing
sification of the protective equipment that designates the
F 819 Definitions of Terms Relating to Electrical Protective
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maximum nominal design voltage of the energized system that
Equipment for Workers
may be safely worked. The nominal design voltage is equal to
2.2 ANSI Standard:
the phase-to-phase voltage on multiphase circuits.
C 84.1 Voltage Ratings for Electric Power Systems and
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3.1.11.1 If there is no multiphase exposure in a system area,
Equipment (60 Hz)
and the voltage exposure is limited to the phase (polarity on d-c
3. Terminology
systems) to ground potential, the phase (polarity on d-c
systems) to ground potential shall be considered to be the
3.1 Definitions:
nominal design voltage.
3.1.1 breakdown—the electrical discharge or arc occurring
3.1.11.2 If electrical equipment and devices are insulated or
between the electrodes and through the equipment being tested.
isolated, or both, such that the multiphase exposure on a
3.1.2 compatible—not injurious to or changing the physical
grounded wye circuit is removed, then the nominal design
or electrical characteristics of the blankets or affecting their
voltage may be considered as the phase-to-ground voltage on
application, use, or acceptability.
that circuit.
3.1.3 designated person—an individual who is qualified by
3.1.12 voltage, maximum retest—the voltage, either a-c rms
experience or training to perform an assigned task.
or d-c avg, that is equal to the proof test voltage for new
3.1.4 electrical testing facility—a location with qualified
protective equipment.
personnel, testing equipment, and procedures for the inspection
3.1.13 voltage, retest—the voltage, either a-c rms or d-c
and electrical testing of electrical insulating protective equip-
avg, that used protective equipment must be capable of
ment (in accordance with Definitions F 819).
withstanding for a specified test period without breakdown.
3.1.14 voltage, nominal design—a nominal value consistent
with the latest revision of ANSI C84.1, assigned to the circuit
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This specification is under the jurisdiction of ASTM Committee F-18 on
or system for the purpose of conveniently designating its
Electrical Protective Equipment for Workers and is the direct responsibility of
Subcommittee F18.25 on Insulating Cover-up Equipment. voltage class.
Current edition approved Aug. 15, 1995. Published October 1995. Originally
published as F 479 – 76. Last previous edition F 479 – 93.
4. Significance and Use
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Annual Book of ASTM Standards, Vol 10.03.
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4.1 Compliance with this specification should continue to
Annual Book of ASTM Standards, Vol 10.02.
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Available from the American National Standards Institute, Inc., 11 West 42nd
provide personnel with insulating blankets of known and
St.,
...
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