ASTM F433-02

Standard Practice for Evaluating Thermal Conductivity of Gasket Materials

SIGNIFICANCE AND USE
This practice is designed to compare related materials under controlled conditions and their ability to maintain a minimum amount of thermal conductance. Test results should be correlated with field results in order to predict heat transfer properties in particular applications.
This practice may be used as a routine test when agreed upon by the user and the producer.
SCOPE
1.1 This practice covers a means of measuring the amount of heat transfer quantitatively through a material or system.
1.2 This practice is similar to the Heat Flow Meter System of Method C 518, but modified to accommodate small test samples of higher thermal conductance.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 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: 09-Oct-2002
• ICS: 21.140 - Seals, glands
• Technical Committee: F03 - Gaskets
• Drafting Committee: F03.10 - Composite Gaskets

Relations

• Replaces: ASTM F433-98 - Standard Practice for Evaluating Thermal Conductivity of Gasket Materials
• Effective Date: 10-Oct-2002
• Replaced By: ASTM F433-02(2009) - Standard Practice for Evaluating Thermal Conductivity of Gasket Materials
• Effective Date: 01-May-2009
• Referred By: ASTM F868-17 - Standard Classification for Laminated Composite Gasket Materials
• Effective Date: 10-Oct-2002
• Referred By: ASTM F104-11(2020) - Standard Classification System for Nonmetallic Gasket Materials
• Effective Date: 10-Oct-2002

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: F 433 – 02
Standard Practice for
1
Evaluating Thermal Conductivity of Gasket Materials
This standard is issued under the fixed designation F433; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope
Dx = sample thickness, mm (in.)
2 2
A = sample cross-sectional area, m (ft )
1.1 This practice covers a means of measuring the amount
q = heat flow, W (Btu/h)
of heat transfer quantitatively through a material or system.
f = heat flow transducer output, mV
1.2 This practice is similar to the Heat Flow Meter System
N = heat flow transducer calibration constant,
of Method C518, but modified to accommodate small test
2 2
W/m ·mV (Btu/h·ft ·mV)
samples of higher thermal conductance.
2 2
Nf = heat flux, W/m (Btu/h·ft )
1.3 The values stated in SI units are to be regarded as the
DT = temperature difference, °C (°F) or mV
standard. The values given in parentheses are for information
T = temperature of lower sample surface,°C (°F)
1
only.
or mV
1.4 This standard does not purport to address all of the
T = temperature of upper sample surface, °C (°F)
2
safety concerns, if any, associated with its use. It is the
or mV
responsibility of the user of this standard to establish appro-
T = temperatureofHFTsurfacefacingsample,°C
h
priate safety and health practices and determine the applica-
(°F) or mV
bility of regulatory limitations prior to use.
T = temperature of upper heater surface facing
c
sample, °C (°F) or mV
2. Referenced Documents
T = temperature,° C (°F)
2.1 ASTM Standards:
d = total temperature drop across interfaces be-
C518 Test Method for Steady-State Thermal Transmission
tween sample and adjacent surfaces, °C (°F)
2
Properties by Means of the Heat Flow Meter Apparatus
or mV
D2214 Test Method for Estimating the Thermal Conduc-
r = coefficient of thermal resistance at interfaces,
3
2 2
tivity of Leather with the Cenco-Fitch Apparatus
m ·K/W (h·ft ·°F/Btu)
F104 Classification System for Nonmetallic Gasket Mate-
a = correction constant
4
rials subscript s = unknown sample
subscript r = known calibration sample
3. Terminology
4. Summary of Practice
3.1 Definitions:
3.1.1 thermal conductivity, k, of a solid material—the time 4.1 The sample and the heat flow transducer (HFT) are
sandwiched between two controlled heater plates. The lower
rate of steady heat flow, watts (or Btu/h), through a unit area,
2 2
m (or ft ), per unit temperature gradient in the direction heater is set at a higher temperature than the upper plate to
produce a flow of heat through the sample. The differential of
perpendicular to an isothermal surface °C/m (or °F/in.). The
2
k-factor is expressed W/m·K (Btu·in./h·ft ·°F). these two temperatures, DT, sensed by thermocouples, is
amplifiedalongwiththeelectricaloutput, f,oftheHFTandis
3.2 Symbols:
directly proportional to the heat flow through the sample,
2 2
expressed as W/m (Btu/h·ft ). See Appendix for further
k = thermal conductivity, W/m·K (Btu·in./
information. This recommended practice can be used for
2
h·ft ·°F)
measuring heat transfer at a hot side temperature up to 200°C
2 2
C = thermal conductance, W/m ·K (Btu/h·ft ·°F)
(392°F). See Figs. 1-5.
5. Significance and Use
1
ThispracticeisunderthejurisdictionofASTMCommitteeF03onGasketsand
5.1 This practice is designed to compare related materials
is the direct responsibility of Subcommittee F03.10 on Composite Gaskets.
under controlled conditions and their ability to maintain a
Current edition approved October 10, 2002. Published October 2002.
2
Annual Book of ASTM Standards, Vol 04.06. minimum amount of thermal conductance. Test results should
3
Annual Book of ASTM Standards, Vol 15.04.
4
Annual Book of ASTM Standards, Vol 09.02.
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F433–02
FIG. 1 Heat Flow Meter Assembly With Water-Cooled Heat Sink
user. (The guard heater is usually set at or near the average
sample temperature between the lower and upper heater
plates.)
9.1.1 Release the compressive load, pull out the tray, and
load the sample. Care must be maintained to ensure that the
tray compartment is free of any foreign matter. Clean as
required.
FIG. 2 HFT Electrical Output and Heat Flow Section With
9.1.2 Push the tray back into the chamber with a ball and
Temperature Sensors
plunger locking the tray into position.
9.1.3 Closethetestsectiondoorandswitchtheaircontrolto
be correlated with field results in order to predict heat transfer
“stack clamped.” The sample holder is now raised automati-
properties in p
...