This document specifies 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. It represents fire exposure of a fully developed fire. This method of test is only applicable to fire resistant ventilation ducts (same construction) with the following classification according to EN 13501-3: – fire from inside and outside i \u2194 o; – applicable to a pressure difference up to 500 Pa; NOTE 1 It is assumed that the duct A test(s) in accordance with EN 1366-1 has been performed with an under-pressure of minimum 500 Pa. – with integrity (E) and insulation (I) criteria equal to or higher than the intended classification for the smoke extraction duct. For the purposes of the test described in this document, the duct is referred to as duct C. This test method has been designed to cover both vertical and horizontal smoke extraction ducts. A vertical system need not be evaluated to this method provided that: – both horizontal (ho) and vertical (ve) classification according to EN 13501-3 has been obtained for the ventilation duct, and – it has been tested in a horizontal orientation to this method. If the ventilation duct in practice is only used for vertical applications in smoke extraction systems, only vertical (ve) classification is bound to be used and tested in a vertical orientation to this method according to EN 13501-3. This test method is suitable for ducts constructed from non-combustible materials (Euroclass A1 and A2 according to EN 13501-1). NOTE 2 Reaction with components of the duct can reduce the oxygen concentration and lead to misinterpretation of the calculated leakage rate. This standard applies to four sided ducts only (with fire exposure on all four sides). Ducts that utilize elements of construction for one, two or three sides are not covered. An alternative test method for one, two and three sided ducts will be developed separately.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 7<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 4 Test equipment 4.1 General 4.2 Furnace 4.3 Perforated plate <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 6 Test specimen 6.1 Size 6.1.1 General 6.1.2 Length 6.1.3 Cross-section 6.2 Number 6.3 Design 6.3.1 General 6.3.2 Openings in duct <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 7 Installation of test specimen 7.1 General 7.2 Standard supporting construction 7.3 Restraint of ducts 7.3.1 Inside the furnace 7.3.2 Outside the furnace <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 8 Conditioning 8.1 General 8.2 Water-based sealing materials 9 Application of instrumentation 9.1 Thermocouples 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 9.2.1 Furnace pressure 9.2.2 Under-pressure in duct <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 9.3 Oxygen measurements 9.4 Deflection measurement for determination of reduction in internal cross-section area <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 10 Test procedure 10.1 General 10.2 Pre-test adjustment of the perforated plate <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 10.3 Test at ambient temperature 10.4 Pre-fire test procedures <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 10.5 Fire test <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 11 Performance criteria 11.1 General requirements <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 11.2 Criteria at ambient temperature 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 11.3.1 General 11.3.2 Integrity 11.3.2.1 General 11.3.2.2 Leakage (Integrity) 11.3.2.3 Mechanical stability <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 13 Field of direct application of test results 13.1 General 13.2 Vertical and horizontal ducts 13.3 Sizes of ducts 13.4 Supporting construction 13.5 Steel ducts <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | Annex\u00a0A (normative)Measurement of volume\/mass flow A.1 Hints on measuring volume flow or mass flow with differential pressure devices A.2 Density <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | A.3 Absolute pressure (barometric pressure) A.4 Viscosity <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | A.5 Characteristic data of the inlet nozzles according to Figure 7 of this standard <\/td>\n<\/tr>\n | ||||||
| 45<\/td>\n | Annex\u00a0B (informative)Measurement of oxygen concentrationDetails on measuring oxygen concentration with paramagnetic cell analysers B.1 General B.2 Choice of O2 measuring devices <\/td>\n<\/tr>\n | ||||||
| 46<\/td>\n | B.3 Effect of O2 measuring device errors B.4 Zero and end point drift <\/td>\n<\/tr>\n | ||||||
| 48<\/td>\n | Annex\u00a0C (informative)The usage of correction factors for the consideration of different parameters 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 <\/td>\n<\/tr>\n | ||||||
| 51<\/td>\n | C.3 Application of correction factors in the simple mass flow formulae and achievable accuracy <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" BS EN 1366-8. Fire resistance tests for service installations – Part 8. Smoke extraction ducts<\/b><\/p>\n |