ASTM F1236-15

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: F1236 − 15
StandardGuide for
1
Visual Inspection of Electrical Protective Rubber Products
This standard is issued under the fixed designation F1236; 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 3.1.2 age cracks—surface cracks that may look like the
crazing of glazed ceramics and become progressively worse
1.1 The purpose of this guide is to present methods and
with time (see Fig. 3).
techniques for the visual inspection of electrical protective
rubber products. This guide also includes descriptions and
3.1.2.1 Discussion—It is normally a slow oxidation process
photographs of irregularities found in these products.
caused by exposure to sunlight and ozone in the atmosphere
and starts in areas of the rubber that are under stress.
NOTE 1—It is not the purpose of this guide to establish the acceptance
level of any irregularity described herein. That shall be established by the 3.1.3 breakdown—the electrical discharge or arc occurring
standard for each product.
between the electrodes and through the equipment being tested
(see Fig. 4, Fig. 5 and Fig. 6).
1.2 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical 3.1.4 chemical bloom—a white or yellowish discoloration
conversions to SI units that are provided for information only on the surface of a rubber product caused by the migration to
and are not considered standard. the surface of chemical additives used in the manufacture of
the finished product (see Fig. 7).
1.3 This standard does not purport to address all of the
3.1.5 color splash—a spot or blotch on the surface of a
safety concerns, if any, associated with its use. It is the
rubber product that occurred during the manufacturing process
responsibility of the user of this standard to establish appro-
when a contrasting colored particle of unvulcanized rubber
priate safety and health practices and determine the applica-
became embedded into the finished product (see Fig. 8).
bility of regulatory limitations prior to use.
3.1.6 cuts— smooth incisions in the surface of the rubber
2. Referenced Documents
that are usually caused by a sharp-edged object that can
2
increase in size when they are placed under strain (see Fig. 9).
2.1 ASTM Standards:
3.1.7 depressions or indentations—a shallow recess in the
F496 Specification for In-Service Care of Insulating Gloves
surface of the rubber that exhibits a thinner rubber thickness at
and Sleeves
the bottom of the depression than in the surrounding areas (see
F819 Terminology Relating to Electrical Protective Equip-
Fig. 10).
ment for Workers
3.1.8 detergent cracks —cracks that appear on the inside
3. Terminology
surface of a glove or sleeve that encircle the outline of a spot
of detergent residue that was not removed during the cleaning
3.1 Definitions of Terms Specific to This Standard:
and rinsing of the form prior to the dipping process.
3.1.1 abrasions and scratches—surface damage that nor-
3.1.9 embedded foreign matter—a particle of non-rubber
mally occurs when a product makes contact with an abrasive
material that has been molded into the finished product and
surface (see Fig. 1 and Fig. 2).
may appear as a bump when the rubber is stretched (see Fig.
3.1.1.1 Discussion—Scuff-like damage can also occur from
11).
a brush contact with a hot object such as a soldering iron. This
3.1.10 form marks—a raised or indented section on the
can sometimes look like the graining on leather.
surface of the rubber that was caused by an irregularity in the
form.
1
3.1.11 hard spot—a hardened area on the rubber surface that
This guide is under the jurisdiction of ASTM Committee F18 on Electrical
Protective Equipment for Workers and is the direct responsibility of Subcommittee
is usually caused by exposure to high heat or chemical attack
F18.60 on Terminology.
(see Figs. 12-15).
Current edition approved April 1, 2015. Published May 2015. Originally
3.1.12 mold marks—a raised or indented section on the
approved in 1989. Last previous edition approved in 2014 as F1236 – 14. DOI:
10.1520/F1236-15.
surface of the rubber that was caused by an irregularity in the
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
mold (see Figs. 16 and 17).
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3.1.13 nicks, snags, or scratches—angular tears, notches, or
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. chip-like injuries in the surface of the rubber that have been
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