JIS T 8020:2020规定了两种互补的方法（方法A和方法B），用于确定防护服材料在热辐射下的耐热和防火性能。这些测试是在具有代表性的单层或多层纺织品或其他用于防辐射服装的材料上进行的 热它们也适用于与带或不带内衣的隔热服总成的整体结构相对应的总成。

JIS T 8020:2020 specifies two complementary methods (Method A and Method B) for determining the behaviour of materials used for protective clothing against heat and fire subjected to heat radiation. These tests are carried out on representative single or multi-layer textiles or other materials intended for clothing for protection against radiant heat. They are also applicable to assemblies, which correspond to the overall build up of a heat protective clothing assembly with or without underclothing.