ASTM WK75944

    New Test Method for Measuring Heat Transmission Through Heat Protective Clothing Materials in Flame Exposure Using a Cylindrical Specimen Holder

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    Developed by Subcommittee: F23.80 | Committee F23 | Contact Staff Manager



    WK75944

    1. Scope

    1.1 This test method measures the thermal stability of a material or combination of materials using a combined convective/radiant heat transmission apparatus consisting of an eccentric cylindrical test sensor. It can be used to estimate the non-steady state thermal transfer through flame-resistant materials used in clothing when subjected to a continuous, combined convective and radiant heat exposure and/or account for the thermal energy contained in a test specimen after the exposure has ceased. The average incident heat flux is 84 kW/m2 (2 cal/cm2s), with durations up to 30 s. 1.1.1 This test method is not applicable to materials that are not flame resistant. NOTE 1The determination of a materials flame resistance shall be made before testing and done according to the applicable performance or specification standard or both for the materials end use. 1.2 This test method is used to measure and describe the response of materials, products, or assemblies to heat 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. 1.3 The measurements obtained and observations noted only apply to the particular material(s) tested using the specified heat flux, flame distribution, and duration. 1.4 Units--The values stated in SI units are to be regarded as the standard. The values given in parentheses are mathematical conversions to inch-pound units or other units commonly used for thermal testing. If appropriate, round the non-SI units for convenience. 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.


    Keywords

    fire; flame testing; flammability; textile; cylinder; instrumented flammability testing; thermal testing; protective clothing; thermal heat protection; thermal energy ratio; heat transfer performance value; apparel

    Rationale

    Heat transmission through protective clothing is primarily determined by fabric thickness and clothing air gaps. Current tests for heat transfer performance of textile materials do not capture the effects of thermal shrinkage as a result of the planar geometry of the test device. A bench top test is needed that will evaluate the contribution of materials thermal stability leading to shrinkage, air gap reduction, and increased heat transmission.

    The title and scope are in draft form and are under development within this ASTM Committee.

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    Work Item Status

    Date Initiated:
    02-17-2021

    Technical Contact:
    John Morton-Aslanis

    Item:
    010

    Ballot:
    F23 (21-04)

    Status:
    Negative Votes Need Resolution