NBN EN 1366-8 : 2004

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Test equipment
   4.1 General
   4.2 Furnace
   4.3 Perforated plate
   4.4 Inlet nozzles
   4.5 Ambient temperature leakage measuring device
   4.6 Pressure sensors for differential pressure control
   4.7 Welded connecting tube
   4.8 Extraction fan connecting duct
   4.9 Extraction fan
   4.10 Thermocouples
   4.11 Surface thermocouples
   4.12 Oxygen measuring equipment
   4.13 Restraining equipment
   4.14 Observation window
5 Test conditions
6 Test specimen
   6.1 Size
   6.2 Number
   6.3 Design
7 Installation of test specimen
   7.1 General
   7.2 Standard supporting construction
   7.3 Duct arrangement
   7.4 Restraint of ducts
   7.5 Perforated plate
8 Conditioning
   8.1 General
   8.2 Hygroscopic sealing materials
9 Application of instrumentation
   9.1 Thermocouples
   9.2 Pressure
   9.3 Oxygen measurements
   9.4 Observations on reduction of cross-section
10 Test procedure
   10.1 Pre-test calibration
   10.2 Leakage measurement at ambient temperature
   10.3 Fire test
11 Performance criteria
   11.1 General requirements
   11.2 Criteria at ambient temperature
   11.3 Criteria under fire conditions
12 Test report
13 Direct field of application of test results
   13.1 General
   13.2 Vertical and horizontal ducts
   13.3 Sizes of ducts
   13.4 Pressure difference
   13.5 Number of sides of duct
Annex A (informative) Surface temperature and volume/mass flow
        measurements
Bibliography

Describes a test method for determining the fire resistance of smoke extraction ducts. It is applicable only to smoke extraction ducts that pass through another fire compartment from the fire compartment to be extracted in case of fire.