ISO 21925-2:2021 耐火试验 空气分配系统用防火挡板 第2部分：膨胀型挡板

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

本文件规定了一种测试方法，用于测定防火阀的耐热性，并评估其防止火灾和烟雾通过空气分配系统从一个防火分区蔓延到另一个防火分区的能力。本文件描述了膨胀型防火阀的相关试验要求。它适用于膨胀型防火阀，预计将被归类为EI防火阀。如果不增加机械阻尼器，它们就无法达到“S”级，其中包括在环境温度下施加的泄漏限制。本文件不适用于仅用于烟雾控制系统的风门、仅用于空气传输应用的消防装置的测试，或用于吊顶的风门，因为风门和风管的安装可能会对吊顶的性能产生不利影响，需要其他评估方法。注:“空气输送”是通过防火门（或墙壁、地板）进行的低压应用，不与风道连接。

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.

标准预览图