JIS T 8024:2020

$31.85

Clothing for protection against heat and flame – Determination of heat
transmission on exposure to both flame and radiant heat

Published By	Publication Date	Number of Pages
JIS	2020-03-25	45

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Category: JIS

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Description

This Standard specifies a test method for measuring the heat transferred through horizontally mounted flame-resistant textile materials when exposed to a combination of convective and radiant heat. The exposure conditions shall be adjusted to be approximately a 50/50 mixture of pure convective heat and pure radiant heat. The total exposure heat flux shall be 84 kW/m².

This test method is applicable to any type of sheet material used either as a single layer or in a multilayer construction when all structures or sub-assemblies are made of flame-resistant materials. It does not apply to materials that are not flame resistant.

This test method does not apply to the evaluation of materials exposed to any other type of thermal energy sources, such as radiant heat only or flame contact only. JIS T 8020 is applicable when evaluating materials for exposure to radiant heat only. JIS T 8021 is applicable when evaluating materials due to flame contact only.

Some, but not all, textiles materials can ignite and continue to burn after exposure to the convective and radiant heat produced by this test method.

This Standard should be used to measure and describe the properties of materials, products or assemblies in response to both convective and radiant energy 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, the results of this test method 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.

NOTE 1 This test method may not correlate to heat-insulative performance of vertically oriented flame-resistant textile materials when exposed to a combination of convective and radiant heat or used in actual clothing configurations.

NOTE 2 The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows.

ISO 17492 : 2019 Clothing for protection against heat and flame — Determination of heat transmission on exposure to both flame and radiant heat (MOD)

In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/IEC Guide 21-1.

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