Standard Test Method for
Flammability of Blankets1

This standard is issued under the fixed designation D 4151; 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

1.1 This test method provides a means to identify blanket
fabrics which ignite easily and propagate flame across the
surface.

1.2 This test method specifies the procedures described in
the“ Voluntary Blanket Flammability Standard” which has
been used by the blanket industry in the United States since
1972.

1.3 This test method 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.

1.4 This standard does not purport to address all of the
safety problems, 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.

2. Referenced Documents

2.1 ASTM Standards:
D 123 Terminology Relating to Textiles2
D 1230 Test Method for Flammability of Apparel Textiles2
D 1776 Practice for Conditioning Textiles for Testing2
D 3411 Test Methods for Flammability of Textile Materials3

2.2 Federal Specification:
NNN-P-40b4

3. Terminology

3.1 Definitions:

3.1.1 blanket, n—for bedding, an unquilted fabric covering
designed primarily to provide thermal insulation.

3.1.1.1 Discussion—Blankets may be made by any textile
process from various types of fibers and may or may not have

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