ASTM E648-06
(Test Method)Standard Test Method for Critical Radiant Flux of Floor-Covering Systems Using a Radiant Heat Energy Source
Standard Test Method for Critical Radiant Flux of Floor-Covering Systems Using a Radiant Heat Energy Source
SCOPE
1.1 This fire-test-response standard covers a procedure for measuring the critical radiant flux of horizontally mounted floor-covering systems exposed to a flaming ignition source in a graded radiant heat energy environment in a test chamber. A specimen is mounted over underlayment, a simulated concrete structural floor, bonded to a simulated structural floor, or otherwise mounted in a typical and representative way.
1.2 This fire-test-response standard measures the critical radiant flux at flame-out. It provides a basis for estimating one aspect of fire exposure behavior for floor-covering systems. The imposed radiant flux simulates the thermal radiation levels likely to impinge on the floors of a building whose upper surfaces are heated by flames or hot gases, or both, from a fully developed fire in an adjacent room or compartment. The standard was developed to simulate an important fire exposure component of fires that develop in corridors or exitways of buildings and is not intended for routine use in estimating flame spread behavior of floor covering in building areas other than corridors or exitways. See for information on proper application and interpretation of experimental results from use of this test.
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 The text of this standard references notes and footnotes that provide explanatory information. These notes and footnotes, excluding those in tables and figures, shall not be considered as requirements of this standard.
1.5 This standard is used to measure and describe the response of materials, products, or assemblies to heat and flame under controlled conditions but does not by itself incorporate all factors required for fire-hazard or fire-risk assessment of materials, products, or assemblies under actual fire conditions.
1.5 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. Specific hazard statements are given in Section 7.
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An American National Standard
Designation: E 648 – 06
Standard Test Method for
Critical Radiant Flux of Floor-Covering Systems Using a
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Radiant Heat Energy Source
This standard is issued under the fixed designation E 648; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 1.6 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.1 This fire-test-response standard covers a procedure for
responsibility of the user of this standard to establish appro-
measuring the critical radiant flux of horizontally mounted
priate safety and health practices and determine the applica-
floor-covering systems exposed to a flaming ignition source in
bility of regulatory limitations prior to use. Specific hazard
a graded radiant heat energy environment in a test chamber.A
statements are given in Section 7.
specimen is mounted over underlayment, a simulated concrete
structural floor, bonded to a simulated structural floor, or
2. Referenced Documents
otherwise mounted in a typical and representative way.
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2.1 ASTM Standards:
1.2 This fire-test-response standard measures the critical
C 1186 Specification for Flat Non-Asbestos Fiber-Cement
radiant flux at flame-out. It provides a basis for estimating one
Sheets
aspect of fire exposure behavior for floor-covering systems.
E 122 Practice for Calculating Sample Size to Estimate,
The imposed radiant flux simulates the thermal radiation levels
With a Specified Tolerable Error, the Average for a
likely to impinge on the floors of a building whose upper
Characteristic of a Lot or Process
surfacesareheatedbyflamesorhotgases,orboth,fromafully
E 136 Test Method for Behavior of Materials in a Vertical
developed fire in an adjacent room or compartment. The
Tube Furnace at 750°C
standard was developed to simulate an important fire exposure
E 171 Specification for Atmospheres for Conditioning and
component of fires that develop in corridors or exitways of
Testing Flexible Barrier Materials
buildings and is not intended for routine use in estimating
E 176 Terminology of Fire Standards
flame spread behavior of floor covering in building areas other
than corridors or exitways. See Appendix X1 for information
3. Terminology
onproperapplicationandinterpretationofexperimentalresults
3.1 Definitions—SeeTerminologyE 176foradditionaldefi-
from use of this test.
nitions.
1.3 The values stated in SI units are to be regarded as the
3.2 Definitions of Terms Specific to This Standard:
standard. The values given in parentheses are for information
3.2.1 blackbody temperature, n—the temperature of a per-
only.
fect radiator—a surface with an emissivity of unity and,
1.4 The text of this standard references notes and footnotes
therefore, a reflectivity of zero.
that provide explanatory information. These notes and foot-
3.2.2 corridor, n—an enclosed space connecting a room or
notes, excluding those in tables and figures, shall not be
compartment with an exit. The corridor includes normal
considered as requirements of this standard.
extensions, such as lobbies and other enlarged spaces, where
1.5 This standard is used to measure and describe the
present.
response of materials, products, or assemblies to heat and
3.2.3 critical radiant flux, n—the level of incident radiant
flame under controlled conditions but does not by itself
heat energy on the floor covering system at the most distant
incorporate all factors required for fire-hazard or fire-risk
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flame-out point. It is reported as W/cm (Btu/ft ·s).
assessment of materials, products, or assemblies under actual
3.2.4 flame-out, n—the time at which the last vestige of
fire conditions.
flame or glow disappears from the surface of the test specimen,
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This test method is under the jurisdiction of ASTM Committee E05 on Fire
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Standards and is the direct responsibility of Subcommittee E05.22 on Surface For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Burning. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved Feb. 15, 2006. Published March 2006. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1978. Last previous edition approved in 2004 as E 648 – 04. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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E648–06
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