ASTM-D3874 2012

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D3874-12 Standard Test Method for Ignition of Materials by Hot Wire Sources

Published By	Publication Date	Number of Pages
ASTM	2012	11

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Categories: 13.220.40 - Ignitability and burning behaviour of materials and products, ASTM

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Description

ASTM D3874-12

Historical Standard: Standard Test Method for Ignition of Materials by Hot Wire Sources

ASTM D3874

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 or sheet materials available in thicknesses ranging from 0.25 to 6.4 mm (0.010 to 0.25 in.).

1.3 This test method applies to materials that are rigid at normal room temperatures. That is, it applies to materials for which the specimen does not deform during preparation, especially during the wire-wrapping step described in 10.1. Examples of deformation that render this test method inapplicable include:

1.3.1 Bowing, in either a transverse or a longitudinal direction, 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 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. (See for further details.)

1.5 This test method measures and describes the response or 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 the materials, products, or assemblies under actual fire conditions.

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.

1.7 Fire testing is inherently hazardous. Adequate safeguards for personnel and property shall be employed in conducting these tests.

Note 1—Although this test method and IEC 60695-2-20, differ in approach and in detail, data obtained using either are technically equivalent.

Keywords

hot wire; ignition; resistance to ignition ; Electrical insulating solids; Electrical resistance/resistivity–insulating materials; Heating tests–electrical insulating materials; Hot wire sources/applications; Ignition–electrical insulating materials; Sheet materials (general)–electrical insulating

ICS Code

ICS Number Code 13.220.40 (Ignitability and burning behaviour of materials and products)

DOI: 10.1520/D3874-12

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology Summary of Test Method
2	Significance and Use Apparatus Safety Precautions Test Specimens Conditioning Procedure
3	Report Precision and Bias Keywords A1. TEST WIRE CALIBRATION A1.1 General A1.2 Apparatus and Equipment A1.3 Procedure A1.4 Calculation FIG. A1.1
4	FIG. A1.2

Additional information

Standard Title	D3874-12 Standard Test Method for Ignition of Materials by Hot Wire Sources
Published Code	ASTM
Publication Date	2012
Pages Count	11
ICS Codes	13.220.40 - Ignitability and burning behaviour of materials and products