标准编号：ISO 21925-2:2021
中文名称：耐火试验 空气分配系统用防火挡板 第2部分：膨胀型挡板
英文名称：Fire resistance tests — Fire dampers for air distribution systems — Part 2: Intumescent dampers
发布日期：2021-06
标准范围
This document specifies a test method for the determination of the resistance of fire dampers to heat, and for the evaluation of their ability to prevent fire and smoke from spreading from one fire compartment to another through an air distribution system.
This document describes the test requirements related to intumescent fire dampers. It is intended for intumescent fire dampers that are expected to be classified as EI dampers. Without the addition of a mechanical damper, they are unable to achieve the “S” classification, which includes a leakage limit imposed at ambient temperature.
This document is not intended to be used for dampers used only in smoke control systems, for testing fire protection devices which only deal with air transfer applications, or for dampers used in suspended ceilings, as the installation of the damper and duct can have an adverse effect on the performance of the suspended ceiling, requiring other methods of evaluation.
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