ASTM F479-06
(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 of workers from accidental contact with live electrical conductors, apparatus, or circuits. The product requirements and acceptance testing are as shown in Specification D 1048.
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 and for specific precautionary statements.
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Designation: F479 – 06
Standard Specification for
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In-Service Care of Insulating Blankets
ThisstandardisissuedunderthefixeddesignationF479;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.2 compatible—not injurious to or changing the physical
or electrical characteristics of the blankets or affecting their
1.1 This specification covers the in-service care, inspection,
application, use, or acceptability.
testing, and use voltage of insulating blankets for protection of
3.1.3 designated person—an individual who is qualified by
workers from accidental contact with live electrical conduc-
experience or training to perform an assigned task.
tors, apparatus, or circuits. The product requirements and
3.1.4 electrical testing facility—a location with qualified
acceptance testing are as shown in Specification D1048.
personnel,testingequipment,andproceduresfortheinspection
1.2 This standard does not purport to address all of the
and electrical testing of electrical insulating protective equip-
safety problems, if any, associated with its use. It is the
ment.
responsibility of the user of this standard to establish appro-
3.1.5 electrode—the energized or grounded conductor por-
priate safety and health practices and determine the applica-
tion of electrical test equipment which is placed near or in
bility of regulatory limitations prior to use. See Section 6 and
contact with the material or equipment being tested.
8.2 for specific precautionary statements.
3.1.6 flashover—the electrical discharge or arc occurring
2. Referenced Documents between electrodes and over or around, but not through, the
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equipment being tested.
2.1 ASTM Standards:
3.1.7 insulated—separated from other conducting surfaces
D1048 Specification for Rubber Insulating Blankets
by a dielectric substance (including air space) offering a high
D2865 Practice for Calibration of Standards and Equipment
resistance to the passage of current.
for Electrical Insulating Materials Testing
3.1.7.1 Discussion—When any object is said to be insu-
F819 Terminology Relating to Electrical Protective Equip-
lated, it is understood to be insulated in a suitable manner for
ment for Workers
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the conditions to which it is subjected. Otherwise, it is, within
2.2 ANSI Standard:
the purposes of this definitions, unisulated. Insulating covering
C 39.5 Safety Requirements for Electrical and Electronic
of conductors is one means of making the conductor insulated.
Measuring and Controlling Instrumentation
3.1.8 ozone—a very active form of oxygen that may be
C 84.1 Voltage Ratings for Electric Power Systems and
produced by corona, arcing, or ultra-violet rays.
Equipment (60 Hz)
3.1.9 ozone cutting and checking—the cracks produced by
3. Terminology
ozone in a material under mechanical stress.
3.1.10 retest—the tests given after the initial acceptance test
3.1 Definitions:
usually performed at regular periodic intervals or as required
3.1.1 breakdown—the electrical discharge or arc occurring
because of physical inspection.
betweentheelectrodesandthroughtheequipmentbeingtested.
3.1.11 unassigned blankets—blankets that are in storage
prior to being issued for use.
3.1.12 voltage, maximum use—the ac voltage (rms), classi-
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This specification is under the jurisdiction of ASTM Committee F18 on
fication of the protective equipment that designates the maxi-
Electrical Protective Equipment for Workers and is the direct responsibility of
Subcommittee F18.25 on Insulating Cover-up Equipment. mum nominal design voltage of the energized system that may
Current edition approved September 1, 2006. Published September 2006.
be safely worked. The nominal design voltage is equal to the
Originally approved in 1976. Last previous edition approved in 2001 as
phase-to-phase voltage on multiphase circuits.
F479 – 95(2001). DOI: 10.1520/F0479-06.
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3.1.12.1 If there is no multiphase exposure in a system area,
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
and the voltage exposure is limited to the phase (polarity on dc
Standards volume information, refer to the standard’s Document Summary page on
systems) to ground potential, the phase (polarity on dc sys-
the ASTM website.
3 tems) to ground potential shall be considered to be the nominal
Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
4th Floor, New York, NY 10036, http://www.ansi.org. design voltage.
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