ISO 21925-2:2021
耐火試驗.空氣分配系統用防火閥.第2部分：膨脹型防火閥
Fire resistance tests - Fire dampers for air distribution systems - Part 2: Intumescent dampers
- 標準號
- ISO 21925-2:2021
- 發布
- 2021年
- 發布單位
- 國際標準化組織
- 當前最新
- ISO 21925-2:2021
- 引用標準
- ISO 5167-1 ISO 834-1
- 適用范圍
- 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. NOTE "Air transfer" is a low-pressure application through a fire separation door (or wall, floor) without any connection to an air duct.