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eLibrary > 23/30444338 DC BS EN 1366-8. Fire resistance tests for service installations - Part 8. Smoke extraction ducts >

23/30444338 DC BS EN 1366-8. Fire resistance tests for service installations - Part 8. Smoke extraction ducts, 2023

41_e_stf (92).pdf [Go to Page]
1 Scope
2 Normative references
3 Terms and definitions
4 Test equipment [Go to Page]
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 duct
4.8 Extraction fan
4.9 Thermocouples
4.10 Surface thermocouples
4.11 Oxygen measuring equipment
4.12 Oxygen measurement probes
4.13 Restraining equipment
4.14 Deflection measurements
5 Test conditions
6 Test specimen [Go to Page]
6.1 Size [Go to Page]
6.1.1 General
6.1.2 Length
6.1.3 Cross-section
6.2 Number
6.3 Design [Go to Page]
6.3.1 General
6.3.2 Openings in duct
6.3.3 Joints in horizontal ducts
6.3.4 Joints in vertical ducts
6.3.5 Support for vertical ducts
6.3.6 Compensators
6.3.7 Access panels
7 Installation of test specimen [Go to Page]
7.1 General
7.2 Standard supporting construction
7.3 Restraint of ducts [Go to Page]
7.3.1 Inside the furnace
7.3.2 Outside the furnace
8 Conditioning [Go to Page]
8.1 General
8.2 Water-based sealing materials
9 Application of instrumentation [Go to Page]
9.1 Thermocouples [Go to Page]
9.1.1 Furnace thermocouples (plate thermometers)
9.1.2 Unexposed surface thermocouples
9.1.3 Measurement of gas temperature adjacent to nozzles
9.2 Pressure [Go to Page]
9.2.1 Furnace pressure
9.2.2 Under-pressure in duct
9.3 Oxygen measurements
9.4 Deflection measurement for determination of reduction in internal cross-section area
10 Test procedure [Go to Page]
10.1 General
10.2 Pre-test adjustment of the perforated plate
10.3 Test at ambient temperature
10.4 Pre-fire test procedures
10.5 Fire test
11 Performance criteria [Go to Page]
11.1 General requirements
11.2 Criteria at ambient temperature [Go to Page]
11.2.1 Ambient leakage
11.2.2 Reduction in internal cross-section area under ambient conditions outside the furnace
11.3 Criteria under fire conditions [Go to Page]
11.3.1 General
11.3.2 Integrity [Go to Page]
11.3.2.1 General
11.3.2.2 Leakage (Integrity)
11.3.2.3 Mechanical stability
11.3.2.4 Reduction in internal cross-section area under fire conditions
11.3.3 Insulation
11.3.4 Smoke-Leakage
12 Test report
13 Field of direct application of test results [Go to Page]
13.1 General
13.2 Vertical and horizontal ducts
13.3 Sizes of ducts
13.4 Supporting construction
13.5 Steel ducts
Annex A (normative)Measurement of volume/mass flow [Go to Page]
A.1 Hints on measuring volume flow or mass flow with differential pressure devices
A.2 Density
A.3 Absolute pressure (barometric pressure)
A.4 Viscosity
A.5 Characteristic data of the inlet nozzles according to Figure 7 of this standard
Annex B (informative)Measurement of oxygen concentrationDetails on measuring oxygen concentration with paramagnetic cell analysers [Go to Page]
B.1 General
B.2 Choice of O2 measuring devices
B.3 Effect of O2 measuring device errors
B.4 Zero and end point drift
Annex C (informative)The usage of correction factors for the consideration of different parameters [Go to Page]
C.1 Details for the development of the correction factors and their error limits
C.2 The complete formula for the leakage mass flow and the parameters
C.3 Application of correction factors in the simple mass flow formulae and achievable accuracy [Go to Page]

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