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ASTM C202-93(2004)

(Test Method)

Standard Test Method for Thermal Conductivity of Refractory Brick

Standard Test Method for Thermal Conductivity of Refractory Brick

SIGNIFICANCE AND USE
The thermal conductivity of refractory brick is a property required for selecting their thermal transmission characteristics. Users select refractory brick to provide specified conditions of heat loss and cold face temperature, without exceeding the temperature limitation of the brick. This test method establishes placement of thermocouples and positioning of test specimens in the calorimeter.  
This procedure must be used with Test Method C 201 and requires a large thermal gradient and steady state conditions. The results are based upon a mean temperature.  
The data from this test method are suitable for specification acceptance, estimating heat loss and surface temperature, and design of multi-layer refractory construction.  
The use of these data requires consideration of the actual application environment and conditions.
SCOPE
1.1 This test method supplements Test Method C 201 and shall be used in conjunction with that test method to determine the thermal conductivity of refractory brick with the exception of insulating firebrick (use Test Method C 182), and carbon refractories. This test method is designed for refractories having a conductivity factor of not more than 200 Btuin./hft2°F (28.8 W/mK).
1.2 The values stated in inch-pound units are to be regarded as the standard. The values in parentheses are provided for information only.
1.3 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
31-Aug-2004
ICS
81.080 - Refractories
Technical Committee
C08 - Refractories
Drafting Committee
C08.02 - Thermal Properties
Current Stage
Ref Project

Relations

Replaces
ASTM C202-93(1998) - Standard Test Method for Thermal Conductivity of Refractory Brick
Effective Date
01-Sep-2004
Replaced By
ASTM C202-93(2009)e1 - Standard Test Method for Thermal Conductivity of Refractory Brick
Effective Date
01-Mar-2009
Referred By
ASTM C201-93(2019)e1 - Standard Test Method for Thermal Conductivity of Refractories
Effective Date
01-Sep-2004
Referred By
ASTM C1470-20 - Standard Guide for Testing the Thermal Properties of Advanced Ceramics
Effective Date
01-Sep-2004

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ASTM C202-93(2004) - Standard Test Method for Thermal Conductivity of Refractory BrickASTM C202-93(2004) - Standard Test Method for Thermal Conductivity of Refractory Brick
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ASTM C202-93(2004) - Standard Test Method for Thermal Conductivity of Refractory Brick
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:C 202 –93 (Reapproved2004)
Standard Test Method for
1
Thermal Conductivity of Refractory Brick
This standard is issued under the fixed designation C 202; 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 3.2 This procedure must be used with Test Method C 201
and requires a large thermal gradient and steady state condi-
1.1 This test method supplements Test Method C 201 and
tions. The results are based upon a mean temperature.
shall be used in conjunction with that test method to determine
3.3 The data from this test method are suitable for specifi-
the thermal conductivity of refractory brick with the exception
cation acceptance, estimating heat loss and surface tempera-
of insulating firebrick (use Test Method C 182), and carbon
ture, and design of multi-layer refractory construction.
refractories. This test method is designed for refractories
3.4 Theuseofthesedatarequiresconsiderationoftheactual
having a conductivity factor of not more than 200 Btu·in./
2
application environment and conditions.
h·ft ·°F (28.8 W/m·K).
1.2 The values stated in inch-pound units are to be regarded
4. Apparatus
as the standard. The values in parentheses are provided for
4.1 The apparatus shall consist of that described in Test
information only.
Method C 201 with the addition of thermocouples, back-up
1.3 This standard does not purport to address all of the
insulation, and refractory fiber paper as described in Sections 6
safety concerns, if any, associated with its use. It is the
and 7 of this test method.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5. Test Specimens
bility of regulatory limitations prior to use.
5.1 The test specimens shall be selected and prepared in
accordance with Test Method C 201.
2. Referenced Documents
2
2.1 ASTM Standards:
6. Installation of Thermocouples in Test Specimen
C 155 Classification of Insulating Firebrick
3
6.1 Thermocouples—Calibrated thermocouples shall be
C 182 Test Method for Thermal Conductivity of Insulating
embedded in the test specimen at two points for measuring
Firebrick
temperature. Platinum-10 % rhodium/platinum thermocouples
C 201 Test Method for Thermal Conductivity of Refracto-
shall be used.Wire ofAWG Gage 28 (0.320 mm) shall be used
ries
in making the thermocouples.
E 220 Method for Calibration of Thermocouples by Com-
6.2 Installation of Thermocouples— The hot junction of the
parison Techniques
thermocouples shall be placed in the center of each 9- by
1
4 ⁄2-in.(228-by114-mm)faceandjustbelowthesurfaceofthe
3. Significance and Use
test specimen. Grooves to receive the wire shall be cut in each
3.1 The thermal conductivity of refractory brick is a prop-
1 1
9- by 4 ⁄2-in. face of the brick to a depth of ⁄32 in. (0.8 mm) by
erty required for selecting their thermal transmission charac-
means of an abrasive wheel 0.02 in. (0.5 mm) in thickness.The
teristics. Users select refractory brick to provide specified
layout for the grooves allows all of the cold junction ends of
conditions of heat loss and cold face temperature, without
the wires to extend from one end of the brick. A groove shall
exceeding the temperature limitation of the brick. This test
1 1
be cut in the center of each 9 by 4 ⁄2-in. face along the 4 ⁄2-in.
method establishes placement of thermocouples and position-
dimension and ending 1 in. (25 mm) from each edge. The path
ing of test specimens in the calorimeter.
of each groove is extended at an angle of 90° to one end of the
brick by cutting grooves parallel to and 1.0 in. from the edge
4
of the specimen. Before cementing the thermocouple wires in
1
This test method is under the jurisdiction of ASTM Committee C08 on
place, measurements shall be taken to obtain, within 60.01 in.
Refractories and is the direct responsibility of Subcommittee C08.02 on Thermal
(0.3 mm), the eventual distance between the center lines of the
Stress Resistance.
Current edition approved Sept. 1, 2004. Published October 2004. Originally
approved in 1945. Last previous edition approved in 1998 as C 202 – 93 (19938).
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Method E 220 specifies calibration procedures for thermocouples.
4
Standards volume information, refer to the standard’s Document Summary page on Alundum Cement RA 562 supplied by the Norton Co., One New Bond St.,
the ASTM website. Worcester, MA 01606, is satisfactory for this purpose.
Copyright © ASTM International, 100 Barr H
...

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