ASTM D3874-03

Standard Test Method for Ignition of Materials by Hot Wire Sources

SCOPE
1.1 This test method is intended to differentiate, in a preliminary fashion, among materials with respect to their resistance to ignition because of their proximity to electrically heated wires and other heat sources.  
1.2 This test method applies to molded and sheet materials available in thicknesses of 0.25 mm (0.010 in.) to 6.4 mm (0.25 in.).
1.3 This test method applies to materials that are rigid at normal room temperatures. That is, the specimen does not deform during preparation including especially the wire-wrapping step described in 8.1. Examples of deformation that render this test method inapplicable include:
1.3.1 Bowing, in either transverse or longitudinal directions, or twisting of the specimen during the wire-wrapping step to a degree visible to the eye.
1.3.2 Visible indentation of the wrapped wire into the edges of the specimen.  
1.4 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are for information only.  
1.5 This standard should be used to measure and describe the properties of materials, products, or assemblies in response to heat and flame under controlled laboratory conditions and should not be used to describe or appraise the fire hazard or fire risk of materials, products, or assemblies under actual fire conditions. However, results of this test may be used as elements of a fire risk assessment which takes into account all of the factors which are pertinent to an assessment of the fire hazard of a particular end use .
1.6 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: 30-Sep-2003
• ICS: 13.220.40 - Ignitability and burning behaviour of materials and products
• ICS: 29.035.01 - Insulating materials in general
• Technical Committee: D09 - Electrical and Electronic Insulating Materials

Relations

• Replaces: ASTM D3874-97 - Standard Test Method for Ignition of Materials by Hot Wire Sources
• Effective Date: 01-Oct-2003
• Replaced By: ASTM D3874-04 - Standard Test Method for Ignition of Materials by Hot Wire Sources
• Effective Date: 01-Sep-2004
• Referred By: ASTM E3020-22 - Standard Practice for Ignition Sources
• Effective Date: 01-Oct-2003

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
An American National Standard
Designation: D 3874 – 03
Standard Test Method for
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Ignition of Materials by Hot Wire Sources
This standard is issued under the fixed designation D 3874; 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 shall be employed in conducting these tests. Fire testing
involves hazardous materials, operations, and equipment.
1.1 This test method is intended to differentiate, in a
preliminary fashion, among materials with respect to their
NOTE 1—Although this test method and IEC 60695-2-20, differ in
resistance to ignition because of their proximity to electrically-
approach and in detail, data obtained using either are technically equiva-
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lent.
heated wires and other heat sources.
1.2 This test method applies to molded or sheet materials
2. Referenced Documents
available in thicknesses ranging from 0.25 to 6.4 mm (0.010 to
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2.1 ASTM Standards:
0.25 in.).
D 1711 Terminology Relating to Electrical Insulation
1.3 This test method applies to materials that are rigid at
E 176 Terminology of Fire Standards
normal room temperatures. That is, it applies to materials for
IEEE/ASTM SI-10 International System of Units (SI) The
which the specimen does not deform during preparation,
Modernized Metric System
especially during the wire-wrapping step described in 10.1.
2.2 IEC Standards:
Examples of deformation that render this test method inappli-
IEC 60695-2-20 Fire Hazard Testing—Section 20:
cable include:
Glowing/Hot-wire Based Test Methods, Hot-wire Coil
1.3.1 Bowing, in either a transverse or a longitudinal direc-
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Ignitability Test on Materials
tion, or twisting of the specimen, during the wire-wrapping
IEC 60695-4 Fire Hazard Testing—Part 4: Terminology
step, to a degree visible to the eye.
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Concerning Fire Tests
1.3.2 Visible indentation of the wrapped wire into the
2.3 ISO Standards
specimen.
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ISO 13943 Fire Safety—Vocabulary
1.4 The values stated in SI units are to be regarded as the
standard. The inch-pound units given in parentheses are for
3. Terminology
information only. (See IEEE/ASTM SI-10 for further details.)
3.1 Definitions:
1.5 This test method measures and describes the response or
3.1.1 Use Terminology E 176 and ISO 13943 and IEC
materials, products, or assemblies to heat and flame under
60695-4 for definitions of terms used in this test method and
controlled conditions, but does not by itself incorporate all
associated with fire issues. Where differences exist in defini-
factors required for fire hazard or fire risk assessment of the
tions, those contained in Terminology E 176 shall be used. Use
materials, products, or assemblies under actual fire conditions.
Terminology D 1711 for definitions of terms used in this test
1.6 This standard does not purport to address all of the
method and associated with electrical insulation materials.
safety concerns, if any, associated with its use. It is the
3.2 Definitions of Terms Specific to This Standard:
responsibility of the user of this standard to establish appro-
3.2.1 ignition, n—initiation of flaming produced by com-
priate safety and health practices and determine the applica-
bustion in the gaseous phase that is accompanied by the
bility of regulatory limitations prior to use.
emission of light.
1.7 Fire testing of products and materials is inherently
hazardous, and adequate safeguards for personnel and property
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This test method is under the jurisdiction of ASTM Committee D09 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Electrical and Electronic Insulating Materials and is the direct responsibility of contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Subcommittee D09.12 on Electrical Tests. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Oct. 1, 2003. Published November 2003. Originally the ASTM website.
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approved in 1988. Last previous edition approved in 1997 as D 3874 – 97. Available from International Electrotechnical Commission (IEC), 3 Rue de
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K. N. Mathes, Chapter 4, “Surface Failure Measurements”, Engineering Varembe, Geneva, Switzerland.
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Dielectrics, Vol. IIB, Electrical Properties of Solid Insulating Materials, Measure- Available from International Organization for Standardization (ISO), 1 rue de
ment Techniques, R. Bartnikas, Editor, ASTM STP 926, ASTM, Philadelphia, 1987. Varembé, Case postale 56, CH-1211, Geneva 20, Switzerland.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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