ISO 21925-2:2021
Fire resistance tests — Fire dampers for air distribution systems — Part 2: Intumescent dampers
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.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principles of the test
5 Apparatus
6 Test construction
6.1 General
6.1.1 Introduction
6.1.2 Side to be tested
6.1.3 Dampers installed in both walls and floors
6.1.4 Dampers installed within a structural opening
6.1.5 Dampers mounted onto face of wall or floor
6.1.6 Dampers remote from wall or floor
6.1.7 Minimum separation between dampers
6.2 Size of specimen
6.3 Specimen installation
6.4 Supporting construction
6.4.1 Principles
6.4.2 Recommended supporting constructions
6.5 Conditioning
7 Determination of leakage of connecting duct and measuring station
8 Opening and closing cycles
9 Fire test
10 Classification and criteria
10.1 General
10.2 Number of tests required
11 Test report
12 Direct field of application of the test results
12.1 Size of fire damper
12.2 Fire dampers installed within structural openings
12.3 Fire dampers mounted onto the face of a wall
12.4 Fire dampers remote from a wall or floor
12.5 Separation between fire dampers and between fire dampers and construction elements
12.6 Supporting constructions
Annex A (normative) Durability
Annex B (informative) Test apparatus
Annex C (informative) Reaction to fire tests — Intumescent materials
Annex D (informative) The use and application of intumescent fire dampers in ducted air distribution systems
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principles of the test
5 Apparatus
6 Test construction
6.1 General
6.1.1 Introduction
6.1.2 Side to be tested
6.1.3 Dampers installed in both walls and floors
6.1.4 Dampers installed within a structural opening
6.1.5 Dampers mounted onto face of wall or floor
6.1.6 Dampers remote from wall or floor
6.1.7 Minimum separation between dampers
6.2 Size of specimen
6.3 Specimen installation
6.4 Supporting construction
6.4.1 Principles
6.4.2 Recommended supporting constructions
6.5 Conditioning
7 Determination of leakage of connecting duct and measuring station
8 Opening and closing cycles
9 Fire test
10 Classification and criteria
10.1 General
10.2 Number of tests required
11 Test report
12 Direct field of application of the test results
12.1 Size of fire damper
12.2 Fire dampers installed within structural openings
12.3 Fire dampers mounted onto the face of a wall
12.4 Fire dampers remote from a wall or floor
12.5 Separation between fire dampers and between fire dampers and construction elements
12.6 Supporting constructions
Annex A (normative) Durability
Annex B (informative) Test apparatus
Annex C (informative) Reaction to fire tests — Intumescent materials
Annex D (informative) The use and application of intumescent fire dampers in ducted air distribution systems
Bibliography