SIST ISO 5925-1:2018/A1:2018

INTERNATIONAL ISO
STANDARD 5925-1
Second edition
2007-09-15
AMENDMENT 1
2015-02-01
Fire tests — Smoke-control door and
shutter assemblies —
Part 1:
Ambient- and medium-temperature
leakage tests
AMENDMENT 1
Essais au feu — Assemblages porte et volet pare-fumée —
Partie 1: Essais de fuite à température ambiante et moyenne
AMENDEMENT 1
Reference number
ISO 5925-1:2007/Amd.1:2015(E)
©
ISO 2015

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ISO 5925-1:2007/Amd.1:2015(E)

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ISO 5925-1:2007/Amd.1:2015(E)

Foreword
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The committee responsible for this document is ISO/TC 92, Fire safety, Subcommittee SC 2, Fire containment.
© ISO 2015 – All rights reserved iii

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ISO 5925-1:2007/Amd.1:2015(E)
Fire tests — Smoke-control door and shutter assemblies —
Part 1:
Ambient- and medium-temperature leakage tests
AMENDMENT 1
Page 10, Annex B
Add a new clause, B.3, as follows:
B.3 Methods for measuring leakage rates
Using the equipment described in B.2, one of the two following methods shall be used for measuring
leakage rates.
B.3.1 Method A
An inlet and an outlet pipe are connected to the chamber in Figure 1 on opposite ends of the chamber
(in the left wall and right wall of the chamber at mid-height). The outlet pipe shall be fitted with a valve
to control chamber pressure. The air flow rate shall be measured in each pipe using apparatus suitable
for this purpose. For example, use a hot wire anemometer traversed across the pipe inside diameter to
determine the average air speed (V ) in the pipe and a thermometer to measure air temperature for
avg
calculations to standard conditions). The airflow rate Q is expressed as
2 3
V (m/hr) × area of pipe (m ) = Q (m /hr)
avg
in each pipe. The air-speed measurement shall be made at least nine pipe diameters from the air flow
source and a minimum of five pipe diameters from the chamber wall. The pipe diameter shall be sized to
allow for accurate traverse averaging of the air speed instrument (at least 75 mm). The total leakage rate
is Q = Q (sealed) – Q (sealed). Before or after the test, the chamber leakage rate shall be determined
t in out
by hermetically sealing the chamber opening (EPDM rubber sheet roofing mounted in a frame, then
installed and sealed with silicone caulk is a suitable hermetic seal) where the door and framing is
normally installed, and measuring Q = Q – Q .
a in out
The specimen leakage rate is then calculated as
...