ISO 21927-8:2017
(Main)Smoke and heat control systems — Part 8: Smoke control dampers
Smoke and heat control systems — Part 8: Smoke control dampers
ISO 21927-8:2017 applies to smoke control dampers, placed on the market and intended to operate as part of a pressure differential system or smoke and heat control system. This document specifies requirements and gives reference to the test methods defined for smoke control dampers and their associated components, such as actuators which are intended to be installed in such systems in buildings. Furthermore, provision on marking and information on installation and maintenance of these products are also given. ISO 21927-8:2017 distinguishes between two categories of smoke control dampers, i.e. single-compartment smoke control dampers and multi‑compartment fire-resisting smoke control dampers. Smoke control dampers covered by this document can be installed into smoke control system ducts or onto the ducts' surface. They can be installed also into a wall, floor or ceiling/roof elements or onto the surface of these elements. NOTE To avoid duplication, reference is made to a variety of other standards. To this end, this document can be read in conjunction with EN 13501‑4, EN 1366‑10 and ISO 10294‑1 for details of the furnace testing. ISO 21927-8:2017 does not consider in detail the detrimental and/or corrosive effects that can be caused by process chemicals present in the atmosphere, which are drawn through the system intentionally or inadvertently.
Systèmes pour le contrôle des fumées et de la chaleur — Partie 8: Volets des désenfumage
General Information
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 21927-8
First edition
2017-04
Smoke and heat control systems —
Part 8:
Smoke control dampers
Systèmes pour le contrôle des fumées et de la chaleur —
Partie 8: Volets des désenfumage
Reference number
©
ISO 2017
© ISO 2017, Published in Switzerland
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ii © ISO 2017 – All rights reserved
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Smoke control damper requirements . 5
4.1 General . 5
4.1.1 Fire resistance . 5
4.1.2 General application . 5
4.2 Construction and components: Characteristics . 5
4.2.1 Construction and operation . 5
4.2.2 Protection against corrosion . 7
4.3 Fire resistance performance criteria: Single-compartment smoke control dampers . 7
4.3.1 Integrity, leakage, HOT400/30 . 7
4.3.2 Durability . 7
4.3.3 Fire resistance classification and designation. 8
4.3.4 Other performance criteria . 8
4.4 Fire resistance performance criteria: Multi-compartment fire-resisting smoke
control dampers . 9
4.4.1 Integrity, insulation, leakage, HOT400/30 . 9
4.4.2 Durability . 9
4.4.3 Fire resistance classification and designation.10
4.4.4 Other performance criteria .10
5 Test methods .10
5.1 Ambient leakage tests .10
5.2 Fire resistance tests .10
5.2.1 General.10
5.2.2 Smoke control damper: Integrity and insulation .12
5.2.3 Leakage rated smoke control damper .12
5.2.4 Response delay of a smoke control damper .12
5.3 Salt spray exposure test .12
5.4 Cycling tests .12
5.5 Damper aerodynamic performance .12
6 Marking and documentation .13
7 Product, installation and maintenance information (documentation) .14
7.1 Product specification .14
7.2 Installation information .14
7.3 Maintenance information .14
Annex A (normative) Salt spray exposure test .15
Annex B (informative) Example of inspection and maintenance procedure .16
Bibliography .17
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
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constitute an endorsement.
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World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: w w w . i s o .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 21, Equipment for fire protection and fire
fighting, Subcommittee SC 11, Smoke and heat control systems and components.
A list of all the parts in the ISO 21927 series can be found on the ISO website.
iv © ISO 2017 – All rights reserved
Introduction
This document contains the basic performance and requirements for smoke control dampers that are
to be used in conjunction with pressure differential systems and smoke and heat control systems. They
can also be used to pressurize when gas extinguishing systems are used.
Particular reference is made to EN 1366-10, which defines the furnace testing associated with these
products and EN 13501-4, which provides details on their fire resistance classification.
In addition to the prevention of transmission of smoke and combustion products from a fire zone, smoke
control dampers are utilized to contain the spillage of otherwise harmful and toxic extinguishing gases
from the affected area and for the control of pressurizing and excess air relief within pressurization
systems.
Smoke control systems are designed to fulfil the following basic functions.
a) The extraction of smoke from a single fire compartment to the outside of the building.
b) The extraction of smoke from fire compartments of a building, using a SHEVS connected to one
or more fire compartments. The smoke control system duct may or may not pass through other
compartments of the building to reach the outside of the building.
c) The use of pressurization to maintain smoke-free clear areas.
Smoke control dampers are commonly used in smoke and heat control systems as a means of limiting
the number of ducts and high temperature fan units. The ducts into which such smoke control dampers
are fitted generally serve a number of different fire compartments. The systems can be dedicated
smoke extraction or possibly a combined environmental ventilation/smoke extraction.
The smoke and heat control system can remove smoke using either high temperature fans (in
accordance with ISO 21927-3) or natural ventilators (in accordance with ISO 21927-2).
It may be necessary for a number of reasons (fire growth, smoke release, etc.) that the open smoke
control damper(s) is (are) required to close and that the damper(s) previously closed is (are) required
to open.
The tests defined in this document are based on the assumption that when smoke is detected within a
building, all smoke control dampers other than those serving the fire compartment/smoke reservoir
(where the fire has initiated) remain closed or move to the closed position. All smoke control dampers
serving the smoke-affected fire compartment/smoke reservoir remain open or move to the open
position, and the fan(s) started/natural vents opened.
NOTE Figure 1 gives examples of installation positions, but these are not the only positions where dampers
can be fitted.
Key
1 fire compartment
2 smoke reservoir
3 air inlet
4 smoke barrier
5 powered smoke and heat exhaust ventilator (fan)
6 smoke control dampers for single-compartments
7 smoke control ducts for single-compartments
8 smoke control ducts for multi-compartments
9 smoke control dampers for multi-compartments mounted inside or outside of wall or floor
10 smoke control dampers for multi-compartments mounted on the surface of the duct
11 electrical equipment
Figure 1 — Example of powered smoke and heat exhaust ventilation
Further guidance on the application of smoke control dampers can be found within the rest of the
EN 12101 series and technical reports.
The areas for which products supplied to this document are considered applicable including, for
example:
a) commercial premises;
b) shopping and retail centres;
c) hospitals;
vi © ISO 2017 – All rights reserved
d) multi-residential buildings.
Smoke control dampers are intended for use in the following types of systems, including:
1) pressurization;
2) pressure relief;
3) extraction systems;
4) ductwork systems;
5) inerting fire suppression systems.
It is realized that all the above systems do not address smoke directly, but similar properties are
required of such smoke control dampers to limit leakage in a fire and smoke control situation.
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