ASTM C155-97(2002)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: C 155 – 97 (Reapproved 2002)
Standard Classification of
Insulating Firebrick
This standard is issued under the fixed designation C 155; 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 weight per unit volume for any group as sold, but is not meant
to be used for detailed engineering calculations.
1.1 This classification covers heat insulating material
known as insulating firebrick. This material is suitable for
4. Basis of Classification
lining certain kinds of industrial furnaces.
4.1 The classification of insulating firebrick in accordance
NOTE 1—Insulating materials for use below 1000°F (538°C) are
with Table 1 is based on bulk density (weight per cubic foot)
covered by ASTM Committee C-16 on Thermal Insulation.
and the behavior in the reheat change test conducted at the
specified temperature.
2. Referenced Documents
2.1 ASTM Standards:
5. Test Methods
C 134 Test Methods for Size, Dimensional Measurements,
5.1 The properties enumerated in this classification shall be
and Bulk Density of Refractory Brick and Insulating
determined in accordance with the following ASTM test
Firebrick
methods:
C 210 Test Method for Reheat Change of Insulating Fire-
5.1.1 Bulk Density—Test Methods C 134.
brick
5.1.2 Reheat Change—Test Method C 210. For the purpose
of this classification, the percentage of reheat change shall be
3. Significance and Use
obtained from only the 9-in. (228-mm) dimension of the test
3.1 This classification establishes an orderly grouping of
brick.
insulating firebrick to provide group identifications for use by
those producing or purchasing these materials. The group
6. Retests
identification number is not meant to specifically designate the
6.1 Because of variables resulting from sampling and the
maximum service temperature although the number times 100
lack of satisfactory reproducibility in tests conducted by
does approximate the temperature (in degrees Fahrenheit) to be
different laboratories, the material may be resampled and
used to check the reheat change and can be used as a guide for
retested when requested by either the manufacturer or the
relative temperature stability. The bulk density limits the
purchaser. This may apply in instances when the first test
results do not conform to the
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