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硅树脂油漆申请美国标准UL 790 Class A 合适吗?
2022-06-11 08:34:00 【中科易朔】
需要确认油漆喷涂的基材,如常规的金属板,不燃板等。UL 790 是针对屋顶覆盖物的防火实验室,有三个测试级别:Class A,B,C,Class A相对是要求比较高的,以此类推,故而申请Class C的会比较多。
备注:测试前需确认底板用可燃还是不燃,可燃基板为木质板或夹板,不燃基板为金属、混凝土、石膏板。
UL 790 标准条款1.2中描述了三个级别分类的火灾试验适用范围:
1.2.1 A级试验适用于以下屋顶覆盖物:
预计可有效抵御严重火灾,为屋顶甲板提供高度防火保护,不会从位置滑落,预计不会造成飞火危险。
1.2.2 B级试验适用于预期能有效抵抗中度火灾暴露、对屋顶甲板提供中度防火保护、不会从位置滑落且不会造成飞火危险的屋顶覆盖物。
1.2.3 C级试验适用于能够有效抵御轻度火灾、为屋顶甲板提供轻度防火保护、不会从位置滑落且预计不会造成飞火危险的屋顶覆盖物。
UL 790阻燃标准中有三个测试方法:
间歇火焰试验
火焰蔓延试验
木垛试验
参考产品:
光伏板;
木板;
各类屋面材料:
相关标准:
ASTM E108屋顶覆盖物防火试验标准试验方法
NFPA256 屋面覆盖物试验
ASTM D226 屋面和防水用饱和沥青有机毡规范
ASTM ED312 屋面用沥青规范
ASTM D2626 屋顶用饱和沥青和涂覆有机毡基板规范
ASTM D4442 木材和木材基材料含水率测定的试验方法
出自JJ2022
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